406 vs 421 sbc for boost It is quite a bit larger at 200" than a Comp 288/296 ROLLER---171/179 vs 169/173. Same exact AFR heads and my cam is almost the exact same size too, except a Lunati (pn 60133). 4 to 1 compression Ported 200cc Brodix RaceRite heads (2. I like the looks of a gen 1 sbc under the hood of it also. Correct me if I'm wrong, but the reload advantage of 406 is not worth it. 81ElCamino Discussion starter. i. Sure is nice to be able to turn the key and have 500+ hp available that you can hardly hear run. 155, and drill steam holes in the AFR heads. I do not want to overbore more than . 05 valves) Comp Cams XR300HR hydraulic roller cam specs: 300/306 advertised 248/254 @. 7000rpm, has to be Hydr. The goal is 550-600 streetable hp at ~6500 rpm and run on 93 octane. 421 to 406 is gonna lose about 20lbs roughly using the same parts. 5 Give me some input as i would like to know how much more torque that the 406 will have vs. 875 stroke/6" Rod = 421:thumbup: an easier route is the 415 cid 3. Balanced race kits at CNC-Motorsports. Anyway (Copy what Bill Jenkins did in his engine books. Perfer pump THE PLACE --- Willowbank Raceway, The Challenge --- Two Friends, two cars, two different engines. The engine compartments are huge. Will a stock block work? Sure. Tech / General Engine - SBC 421 dyno results - Finally got my sbc 421 together and put it on the dyno Here are the specs: 4. 406" SBC roller engine. Save Share My motor was suited for boost, so I wanted to build a fuel system that could support E85 to run boost without having to build a different motor. 19 @142 and a 5. With the 406 in the Chevy II, I was shifting at about 7400rpm, with the cast/hypereutectic 406 in the '55 right now, I shift at 6200. I just pulled out my SBC 400 (2-bolt) for a refresher. e85. I have been getting ready to order parts, but the two most competent engine machinists I have found have both (independently) recommended that I would be better off with a 377 (4. The 500 hp SBC will be a little hard to live with unless you are hard core hotrodder. 06 S/S valves , 100 thou longer push rods , 5. 0 BUSHED OR PRESS FIT RODS. So, start off with as much HP as possible before boost. My interest is on the Hydraulic Roller Voodoo Retro-Fit Lunati 20120711K (60111). Will be a good long term investment, good for several rebuilds. 383 vs. To me, if you can make the same power with a 6,000 rpm 406 and a 7,000 rpm 355, then the 355 is more likely to break bottom end parts due to rpm. Fresh motor getting ready to race after bigger Carb was installed. 19 posts · Joined 1999 Add to quote; Only show this user #1 · Mar 5, 2000. It made 536 hp and 526 ft lbs on dyno this last spring. It's a weekend TOY that will also spend time at the dragstrip. The original discussion was on normally aspirated 383 vs 406, not about boost. I just dont know if I should go with a 200, a 215 or a 230cc sized head. In the process of rebuilding my sbc400 to a 406. We use the best name brands such as Dart, Callies, Lunati, The 396 SBC stroker is rather in-depth to build, you can use the same stroke crank used to make a 396 from the 350 block to make a 414 to 421" engine with the bigger bore block. will be good on a street/strip 406. 4:1 1. You Decide The Boost - You Decide The Power!! Supercharged / Turbo. 672/. Brodix and Profiler heads are quality companies. com. I had a similar problem with an annular booster 800 Mighty Demon and wound up going from . s of boost. 230cc. I have 11" of vaccum at idle and it 406 or 420 sbc. 421 is a good n/a and nitrous . After the supercharger locked out at 20 works surprisingly well. 6 rocker arm will boost the lift by 1. Currently I am propped it about 5400 running a 23p Mirage. The Goal ---- Too Win, Too be the Quickest, Too be the Fa If you want to build something that probably will have the best longevity. autotransdesign. 10 gear 406 sbc, 10. General Q & A - 406 / 421 sbc builds - Anyone care to share their build experiences with a 400 small block chevy? I have several blocks available, thinking of building a GM block 406 or possibly a 421. Just would like to see everybody's opinion on this, Hypothetically speaking if you have a 496bbc built for boost, a good roller cam, a set of dart heads (in proportion to the cubic inch)9. 31 12 bolt that's why i run boost and small cams now, i want it all, Put together a 421 recently with cam specs almost identical with ported RHS 235 heads and had similar results. and free HP. Callies Dragonslayer crank with their Ultra H-beam Rods. A brand-new, unused The stock chevy block, not so much due to the main webbings. 750 400 crankshaft. Overview Building a high-performance 421 cubic inch small-block Chevrolet (SBC) engine that produces 700 horsepower is no small feat. 13 Degree Brodix Heads worked by Eric Weingartener, Titanium Intake Valves, Inconel Exhaust Valves, T&D Billet Steel Shaft Rocker System, Dart Little M Block Just wondering what would be the best starting platform to build a 400 or 406 sbc. That is . Quick fuel 750 annular booster carb I was thinking of has an electric choke your not wanting. Was wondering if it is possible with AFR's big heads and 850cfm or bigger carb. We run the Brodix 18X heads a custom grind Comp roller cam, Lunati crank and rods . Our pump-gas 383's average approximately 475 HP and our 400's come in around 575. 562/. 0285" on the HS bleeds to flatten the curve out. Engine is built for boost and racing. 5 CR AFR 210 heads 255/263 solid roller 383 SBC. Jump to Latest (511) 4 bolt mains w/studs. 05@110 I would look at a 421 using a 4 inch stroke in a standard cam tunnel block you end to small of base circle cam which creates a lot of lifter pressure angle. 8. 420 lobe I can get away with a 1. Then spray away. 5 rocker does, and the heads flow well Put together a 421 recently with cam specs almost identical with ported RHS 235 heads and had similar results. Brand New. 400s are the best bang for the buck when it comes to SBCs. reason for the ****ty rods is they were cheap got it all for under 1000, I wanted the 227 or the 235 because this motor will only be use a season maybe 2 then set on the shelf for a backup and replaced with a 434 and I would like to have either of the heads What's the BEST SBC to build for bracket racing in 2019? Let's discuss what's going to be in the car at the drag races this year, plus some other updates fro I am thinking of building a sbc 408 for a street car and would like opinions on the 408 stroker . A 350 eagle steel, and a stock 3. 07 @ 131 - 6. From actual dyno runs: The 400 sbc that I mentioned above is make 477 ftlb at 2500 and 525 ftlb at 3500 rpms. greg_moreira. 48” stroke). Been looking into SB2 topend,as you all know done right is big money. It was making 5. 125/1. Street Edge 10" 2800, 8. We run a Naturally aspirated 421 SBC in my daughter's 69 Firebird . 7 or 6" rod 406 is all you need with a stock block, if your going to build for cubes, buy the dart block and build a 454 cid SBC now thats a stroker! 2wld4u Best way to get 500 hp and 500 tq from 406 sbc. Jump to Latest 77 Monte 421 Profilers ported by Eric Weingartner, they have downleg boosters. $5000 for a 400 SBC rebuild and 20+ vs. 15 to 17lb. I used 6" rods with a standard base circle camshaft with minor rod grinding. If so what advantage would the larger engine be in a light weight dragster? Tom. I see that the 6" rod combo is the cheaper way to go . And at that point it is a mere crapshoot that the stock 4 bolt will withstand boost abuse for any extended period. Surprisingly it makes just under 500hp. 630 104 LC 4000# with driver TH-400 w/ 3800 stall Super Victor and 235 Pro Toplines Race Demon RS 1050 Any other advice on the tune would be great. 5 ex rockers, Victor Jr,750 dbl pmp Holley. 1. 875" stroke crank Ohio Crank H6000 rods w/ARP 2000 bolts JE pistons Race rings and bearings Internally balanced - Billet caps add $700. 67 camaro 420 - 641hp HRcam 1. BUILT FOR BOOST! BOROWSKI RACE ENGINES, INC. So max you're shooting 4 more salvoes in a full game. " Alot more 406-421-434 builds but I wanted to be differant. Carb for 406 sbc. 55 watchers. I would like to know is a 406 a better choice over a 383 for 383 or 421 sbc. 000 base circle cam using a Callies rotator using the compstar rods. R. 50 ProCharger I have a 9"ATI converter that flashes 4500 with the current 9. MGP’s Pro 6100 Series Billet Big Block Chevy Aluminum Rods 6. 6. Free shipping. 50 and is a comps cam, and I know both the 227 and the 235 take shaft mount rockers. Hey guys. I would be happy to get 580 to 600 hp out of it with room to move in the future. 427 vs 355ci While I love my 2 ss the 406 will scare The manual explains that timing should be reduced 2 degrees for every one lbs of boost. Get the best deals for 421 Sbc Engine at eBay. a 421), and use easy to find, off the shelf parts. I have a buddy who offered me a set world product heads Sportsman 2 2. About Us; Promotions; Videos; We Ship Worldwide. 200, for the same at . 10:1 CR. Listing ID 182689746. With a nice set of Diamond Nitrous Domed pistons. BTW, hydroboost is awesome on boosted engines. ) SHP or Little M will get you 421" pretty easy. Plus cam to rod clearance is Nuts with a 4. a lot of kits with the 6" rod. Now, if you can afford all the best in bottom end parts, then this may not seem big. New Scat Forged Crank I’ve had Chris Straub from Straub technologies do 4 cams for me. 7 psi of boost to a 275hp 350 and it will make 550hp. 29 sixty 6. I got 6" rods in my 406 the advantage is a heck of alot more HP disavantage is youll need different pistons or you could go with 6" rods and a different crank but youll need some clearancing done which really isnt advisable on a 406 due to the block webbing being thin. It also recomends a MSD retard boost timing box which I really dont want for 5-6 psi . 1/4's. 7 Eagle rods , Victor Junior & Victor 4x4 , 830 Holley. 85" of extra length is all in front of the engine mounts, since the mounts are in the same location relative to the back of the block. 7 406 SBC head recommendations. May need more spring pressure than 155, shim to 175-180 would work depending what lobe lift is available before bind I ran those pac spring afr195’s to 7000 in a 383 sbc. $201. Now testing new Travis Quillen Motorsports Engineering Methanol boost referenced high pressure MFI system Easy tune and killing power. 0 compression, efi, procharger F1 (cog) set up to max out at 7000rpm 70000 impeler rpm, lets say the big block peaks at 15 psi of boost, now the sbc, 383 good roller, 9. SBC Heads Questions 406 vs 388. 30 over with H-beam 5. the 383( both motors built the same) I have heard that the 406 is a torque monster? True or false?The 383?? Thanks! Remember that the trans is a th350 and the gears are a 4:10. Would build similar to a couple 383 builds that I have done. Total Seal plasma moly rings will do the job just fine. I recently purchased AFR heads, 195 street port. . I would go for the 406 anyday. Save Share I am partial to the 421 builds myself . 00. Frankly the blown SBC is my cup mainly because I can't afford the blown BBC. I'd stick with a 406 with those heads, if your plan is to turn over 7000rpm . T-flow C3 Tech/Performance - 383 vs 406 - I have a lead on a 350 4 bolt and a 406 2 bolt. 125" BoreCrankshaft: Smeding 4340 Forged Steel, Internal/External Balance, 3. Top. Jump to Latest 10K views 23 replies 7 participants last post by 81ElCamino Mar 13, 2000. It does not have to have any 'street' manners, and won't have AC, power brakes, etc. I agree that boost is a great equalizer but I am building a 421 sbc with a short block from Ohio crank. mike I'm looking to build a high compression 406 cu in full race engine for nostalgia bracket racing. Jump to Latest Wouldn't the big bore and thin cylinder walls on the 472ci sbc give you head gasket issues at high boost? How would it rpm with the long stroke? Also the biggest flowing SBC heads cost a packet more than equivalent flowing BBC heads. Moderator: Team. Would like for your opinions, thoughts, recomendations AFR CHEVY SBC 406 421 434 ELIMINATOR HEADS 220cc 65cc SOLID ROLLER # 1065 . Customer Service 605-692-1697. 410-415ci would be my choice unless you go Tall Deck. are also suitable for use with nitrous systems up to approx. 875 stroke) 95% street/strip combo, pump gas. 406 with 11. 875 stroke (421 cid)is worth the cost , potential durability or potential problems, personally Id stick to building a 406 sbc ( 4. 155 Bore x 3. WISECO FORGED PISTONS 4. The second one is a 421 brodix race rite cnced heads, eagle crank rods, billet caps, team g intake ( done by wilson) C3 Tech/Performance - SBC 383 vs. With the 4. Ed-vancedEngines. I was looking into the Dart Iron Eagle Platinum series cylinder heads. 600? were the test engines valve train tops 406 sbc guys? Jump to Latest 406 X2 what Al said. I beat the heck out it and don't expect good fuel economy. One of the best cam for bracket engines in your cubic inch range, and great for 327/350 engines at 406 SBC Build. Engine Specifications Engine is a 421 SBC built with a Dart SHP block. 1972 Chevrolet #511 400 block with 4-bolt mains. Turbo 400 with a 2400 stall converter and 3:55 gears. I'm needing around 750 horsepower to be competitive at my race track (super latemodel) circle track. New. Steam holes. I added the Billet Splayed Main caps to mine. Jump to Latest Good reading here, been looking into this also as I have built some 406 and 408s that did real well. The key thing to remember is boost is a hp multiplier. 79 @ 137. 0" stroke. Pistons were a SRP due to the Procharger, cam was 226 @ . 12549 posts · Joined 2007 Add to quote; Only show Putting together a 421 SBC ( 4. The solids are in a 434, 421, and 406. 0 @ 7500 Peak TQ= 585. I'm waiting for the specs on the cam but I know the heads are pretty aggressive but I think with a 406 they should work good. 6 in 1. 496. 2" 3. Thread starter Lmus10; Start date Nov 14, 2016; L. Sponsored by: going with a 1. Is this in an apples-to-apples comparison, or are there perhaps (Add) My guys just faxed the dyno sheet over to me from a 421" SB similar to the one also mentioned above. 250hp and superchargers up to approx. 030", if at all possible . He needs enough vacuum for 400 sbc I am a professional engine builder and have just built a 421 c. 1st, 406 11:1 home ported stock valve size 062 Vortec heads Ported Super Victor, 1000 M/D Hyd flat tappet cam 1 5/8" headers Results, best of 10. The 421 seems very popular now and the 220 AFR's would be the way to go. 1000 using a 420 lobe. But if your on a budget, then it definately is. 2800 to 3200 stall!! 1970 chevelle silent sleeper sbc powered jap trap eater 406 SBC M21 3. Chat Online; Help Center; Order JE makes a nice blower piston for a 4. Same question for the big block 468 vs. 25 to 1 compression. 06@111 in a 3250 pound car. 200/1. 11 gear and a regular radial tire it could be traction challenged if you get aggressive with the I spoke to an engine builder he suggested a 406 small block to be more reliable because of a bigger displacement. This was the actual sales ad from the engine builder who built and dynoed the engine. AFR 195s were used with a Victor Jr again for the procharger, Holley 770 avenger with a 4 hole spacer, 1 3/4 headers. 2347 posts 406 SBC on E85 - 10. It’s been Cadillac V8, 225 should be sufficient for a 406 – 421 (depending if I stroke or not). 7 to1 comp and same pulleys as you and I am just breaking in what are your engine specs my blower has no surge and makes boost right off idle. :thumbup: -VS a SBC 434 14:1 CR Dart Pro 1 215CC Heads 2. Bill Simpkins 74 Nova SBC 406 3240 pounds 1. It begins to get very pricey after you go beyond a 3. Be careful of the lure of large displacement small blocks. 040 over)with Billet Steel Caps, Boost Line Rods, Callies Ultra Magnum 3. IMO a BBC fits just about as well as a SBC in these cars. As far as a crank is concerned , I like an internal balanced crank set up for 6 inch rods. Build a 406. The hydraulic roller is in a zz3 350 with 195 AFR heads. Post by Ed-vancedEngines » Sat Aug 11, 2007 11:51 pm. 76 60FT Drag Radials But depending on head choice, you may never see any difference in power what so ever with more cubic inch. based on a factory 400 sbc for my son. 08, 220cc 64 heads complete with a roller cam ect. 025" Deck Height, 1 Piece Seal, 4. All make over 600hp on pump gas. -My first option is to have the Chevy 400 block machined for 4-bolt splayed main caps, punch it out to 4. Here's what I have so far: When you run it itn the car VS on the dyno under ideal controled conditionss VS on road every day less than ideal conditions it will need a higher octane gas My friend is building a 377 and I am building a 406 and here is some info on both My 406 Forged bottom end 10. 155” bore by 4” stroke). 3. Just doing the math, compression is worth about 2% per point. You need a small base circle cam or the rods will hit it or go with a +. 400 inches of valve lift have taken place (see Fig 1). 875 ). Does it get good fuel economy? No, but I dont drive my nova in looks for good fuel economy. 832 stroke 5. I went this route becuase I have stock block and I wanted to spray 200-350 nitrous. My engine is very similar to the one in the article and is a 406. 406 SBC Dyno Tested Long Blocks. 8 in the can at 10 " vacuum. We are installing new flat top pistons because we cracked a dome piston not to mention it would be 12. Why not the tried and true 406 in SBC or better yet a 408 in a LS. 5-1 CR Dart Little "M" Block w/Splayed Nodular Caps Manley 4340 Non SBC 406 11. Have 400 and 350 rods. 600 valves 1-4 Barrell ProSystems Carb Peak HP= 756. Have read all of the 406 combos I could find. 02 @ 229 (3. derosnopS. I can toast the MT et streets at 30mph on the street anytime. I know, and knew, it is a 421. QUESTION,if I swapped out these heads now,I Block: Smeding Heavy Duty 4 Bolt Mains, 9. I’m interested in hearing your view and arguments of what heads to go for, IMO the only reason to ever build a sbc using a 4 inch bore block is if you already have a 4 inch bore block. Nice that a smaller head can do almost the same. cranecams. TCI TH350. 🙂 This is a pretty big cam for a flat tappet. Shop by SBC CHEVY 406 421 434 DART SHP BLOCK 4. If you have to buy a new crank you might as well stroke the 400 block out to 415 or 421 is safe. My roller cams are about 10* bigger at . I ran 11. 5cc DISH PISTONS SCAT CRANK & RODS . Discussion in 'The Hokey Ass Message Board' started by TB3, Feb 9, 2012. 400 SBC, 9:1, AFR 195s, TH400, Coan converter, 3. 36 @ 107 All motor ~ 3200 lb. Regardless of port volume all these heads flow about the same cfm until some 0. 07 comp, ported Trick Flow 195 heads, RPM Air gap, Holley 3310, Straub HR . I’m not new to engines, done several rebuilds but it’s been original spec mostly and never a Chevy engine. It is driven on the street and it never overheats even in traffic . We have a 406 sbc Motown block, Lunati I beam rods, Cola crank, its a solid roller engine at the moment, Iron Dart 220 Heads that flow just shy of 300. My 421 makes gobs of power and tq and is pretty darn drivable. 580 @ the valve, on a 112. 421 Small Block Chevy Short Block Price; Motown block Ohio Crankshaft 4340 3. The block will be the 880 roller block . 7" Rods General Q & A - 406 / 421 sbc builds - 94Sylvan- I have never had engine on a dyno but an educated guess would be peak power at about 5500-5600 rpm. 040 over and a 3. Motor: 406 SBC Forged pistons 10. 875 stroke, 421sbc nitrous motor 12-1 compression, The converter is from the last combo (flat top 406) and stalled at Building and testing a 406 ci small block chevy vs a 402ci ls2 chevy small block - Chevy High Performance Magazine C4 General Discussion - 377 build vs 406 sbc??? - Street build. 155 bore x 3. For Trade : a 1970 SBC 406 4bm, (Complete - Freshly rebuilt; New Forged Crank) for a BBC 454. Mikej26 Member Posts: 103 Joined: Sat Jul 14, 2018 11:53 pm That's gonna follow the difference in cubes pretty directly. 750 Stroke 8. the smaller cranks puts less stress on mains and has a A friend of mine with 406 small block in a 65 Chevelle needs a cam recommendation from the "real pros" :beers: It's a weekend cruiser with appox. 14 1 Dart SHP LS Next 427 Turbo or NA Short Block However - I haven't seen a test / comparison on a 406; On the bigger engines like the 421 the Air Gap has to small of a CSA to support air flow at Higher RPM's . whiteperformance1 (211503) 99. 535 Boost, Nitrous. 050, . 875" stroke- puts you into a forged 4340 crank then, $1500 LSX vs. 434 sbc 421 sbc. 91@660) Well i'm shopping for a crank for my 406 (stock block). 066 times what a 1. 64cc chamber. 875 inch stroke, (415-421 cid). 875 Crank, matched Brodix Intake, Manton Push Rods, Howard’s Lifters, Custom Comp Cam, Comp Belt The COMP Cams CL12-212-2 Magnum Cam and Lifter Kit is an exceptional choice for a cam seeking reliable performance for a 406 SBC engine. Wonder who has built one and if they'd do it again. I don't know if i need or not a small base circle cam. 509 two bolt 400 block, bored . I am mainly concerned about the 350 Block vs 400 Block strength and overheating issues . The store will not work correctly when cookies are disabled. 800" StrokeRods: Smeding 5140 Forged Steel I-Beam with 3/8" Bolts, 5. I have 4. Re: Anyone do a 406 to 421 SBC comparison? Results? Worth the change? by RevTheory i would run the 406 for shorter stroke than the 421 that way you can get a better piston built that way you can put some boost in it . 700" LengthPistons: JE Custom 2618 Forged Aluminum, 18cc Dish, Coated SkirtsRings: Stainless Steel I have Wisecos in my blown 406, they work fine. 8:1, AFR 227 wicked on the street 500 will be that, my pretty simple and streetable (to me, some may have called it borderline) 406 was right there and it was a blast to drive and I tell people if your going to build a 400 or 406 bump up to the 421 for a street build its the way to go. 8-71 supercharged 421 sbc. com www. 6) 406 for a procharger, thought I would share the results. Good luck which ever way you go. I am running AFR 210 Eliminator heads I am considering replacing the rotating assembly with a forged one and upticking boost to 12 PSI . The cu in difference would be worth about 22 lb ft of torque, all else considered. Afr 220 406-421 sbc is a tried and true street combo with hyd roller. I am having ring seal problems with the stock block, but it may be caused by not Torque plate honing it when I have it bored. 4 bolt mains are weaker than 2 with these. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. So far with a . It’s A 406 Sbc . 383 vs 406 Chevy. We just bolted on a BLP 1230 Alky Dominator on my 23° Brodix Track One 233 421 s/b Chevrolet on top of a SV2 intake we put a 4500 top on. As for the Shop the Best SBC 415-421 Stroker Kits and Forged rotating assembly kits for turbo, nitrous, or street. I have read just as many problems with SBC headers and BBC headers. Hey guys,,,,, lets see what your running (pic's?) Some of you might already know from a past post but I have been working on my 406 the last couple weeks, thinking of trying some different combo's out at the track, so LIST your combo of your 400 or 406 sbc here,, lets see what you got and how it runs, drives and sounds,, all by the way all out racing combos are just fine 2nd choice sbc 406 no carb or accessories (4300$) motor is on engine stand never ran Fresh from machine shop! Fresh, all new forged internals, SB Chevy 406 motor, complete, intake to pan. 300 raised cam Dart block to avoid this problem but you don't have an oil filter pad on the race block so you need to do something in a remote filter. SBC vs LS Presently have a 406" dynoed 560hp. You'll save a pile of money (vs. SBC 400 - What do you guys think? The 406 is probably the most economical option with the Brodix Track 1s she wants or some other aluminum heads and some nitrous. 155 x 3. $2,975. Depends on what you want to do with your car, and what boost levels the engine will see. 85 We have a 421 SBC with 220 AFR heads and we are using Littlefield 6-71 supercharger @14lbs boost, Callies Magnum crank, Lunati rods, JE pistons, 7. The initial build was costly but the freshen ups we did were only a few thousand. GM headed 18* 406 Victor Glidden intake 13. 875 crank and 6 ing rods. Ive got a 406 chev, RPM air gap, AFR 195 heads, TKO 600 in a 3400 lb car and im looking at the Holley 850 street HP carb. 875 Stroke. 415 SBC pump gas street car:twisted: I’m looking to build a 414 421 sbc (3. If it is a decent blower, 10% overdriven will probabably put you at 15lbs boost which is rather pushing it with 8:1 compression and pump gas. I would consider selling the 400 block and all your used parts and buying a good used 421 engine or a complete new engine if you can find one. Add 14. I have bought a 142 weiand blower off my buddys 406. New (Other) $195. I have several blocks available, thinking of building a GM block 406 or possibly a 421. 18 @ 110 with my 70 chevelle 3,540lb street strip car. The intent here is to run four pairs of the Dart Platinum Pro 1 heads having intake port volumes of 180, 200, 215, and 230 cc. In a 421 cubic inch engine it will idle much better and have more vacuum. This motor was never fired up. Would build similar to a couple 383 I was researching crate motors using the Dart SHP block and noticed 421, 427 and 434 cubic inch engines being built. 904 lifters because of the smaller base circle cams. 155 BORE SIZE FOR SBC 406 ENGINES, -13. 39, 9. www. 3 solid rollers and the last one was a hydraulic roller. ( No electronics and on foot brake ) Great lil motor, make right at 700 hp. 5 lbs of boost on his 406. Check out our custom options and packages below I have a 406 sbc short block that I am going to build. Stage I. I'll let you decide if it's worth it. 625 15:1 CR Combo !! so you need to be careful comparing any 383 vs 406 or 406 vs 434 or A 427 SBC will be in the same game as far as cost as the big block at this hp level. CNC-Motorsports offers the best selection in SBC 302-350-358-377-383-400-415-434-441 short blocks. Jump to Latest We run a 421 n/a on alcohol with 18 degree bowtie heads and intake not sure on how much hp it makes but it ran a best of 9. I don't think going with a larger bore than 4. Here's what I was thinking. 155 bore good street kit, the 421 is good to 6500 the 415 about 5500-6000 imo, a 5. Great acceleration, torque and I have a 434 sbc with 10. 00 ATI SB I would start with a 421 or a 427 the 434 is going to bore the block to the limit from the start. 40 minutes dyno 377 vs 406 vs 434. 75 SBC and 5. 7 psi of boost a 150 hp smogger 350 engine then it will only make 300hp. If you don't have a 350 block now there is no advantage to the 383 over the 406. [inpost_gallery post_id=2305 group=”1″] The Test Heads. Very pleased with Straubs cams. The 406 sbc kicked the 402 bbc in low rpm and mid range torque. santhuffshocks. Do they pose any problems using Iron Welcome to the site. 421 SBC CAM UPGRADE. A 402 built by chevyhiperformance made 394 ftlbs at 2500 and 456ftlb at 3500. 02 & 1. Absolute Killer 421 SBC Built For Boost. 00 shipping. SBC 421 cylinder head selection. Would like to run pump gas. I like your plans. 67 Nova HotPass OK, we've done some of these in the past and trying to figure out the my sizing. I dont have heads yet and know they will be alum. Jump to Latest This camshaft with Dart 215's as cast on a 406 has been 5. asbi street drive my car . The 406 sbc with vortec heads makes BBC torque even in the low rpms. I wouldve thought a 750 wouldve been big enough but for reasons beyond me the 850 is better on the software dyno. Used parts are bring a premium. 5:1 Ignition Timing = 35 Degrees Block = Factory 400 Crankshaft = Scat cast iron Rods = Scat 4340 I-Beam Pistons & Rings = 377 vs 434 SBC?? I had pretty much narrowed down my engine combination to a 434 small block (4. It just doesn't make sense if you ask me. 040" down to . 0,dart heads, Will I ever put one in my nova? Probably not. PM was sent. 20's in the 1/8, provides GREAT torque. Jump to Latest twenty years ago I made 757 HP with a stock block 406-Tunnelram with two dominators. 7" rods that will put you right where you want to be on the static compression ratio. If you were comparing a 396 vs a 406 I think I'd lean a little more toward the 406 but even then the 396 has the advantage of bigger heads with more airflow capacity. It seems to have what i want. 83 1/8 at the shootout last November in an 91 s10 currently building a 63 chevy II should be lighter with the same engine hoping for eights!!! 406 vs 434. 08 @ 132. n2omike Guru Posts: 1067 Joined: Sun Sep 03, 2006 2:56 am Location: West Re: What heads for 421 SBC? Post by CNC BLOCKS » Fri Aug 22, 2014 12:23 pm wyrmrider wrote: "You don't need a raised cam tunnel block with a 3. Like said tho, cam libe choice and a good lifter is needed to work at higher rpm. I had built a 406 small block Chevy back wondering if I should replace these for 461 Camel humps I have on the motor now. I want to know which of these two, 406 or 421 stroker engines would be best for this car and why? The car will be a If your builder doesn't mind the extra work that high ratio rockers sometimes create, going with a 1. The BBC is taller and longer than a SBC, but the 1. I hear ya on wanting to go a different route as far as cube numbers but my little 406 dynoed 540 hp and 551 ftlbs torque with an 1-5/8 header. The short block is stock. Low hours. I know that the 377 will handle a few more revs than the 406, so it would work great in the '55 (it has 5. (The two bolt main blocks are stronger than the four bolt blocks in the 400 motors). com I run a 421 sbc with 3. Opens in a new window or tab. 04 for 24 months with PayPal Credit * Condition: New New. I plan to go forged lower end and it will be going into a 77. 36 Eaton Posi, 77 Monte 421 Profilers ported by Eric Weingartner, A 383 vs a 406 is like comparing a BBC 396" to a BBC 427" really no contest ! Steve 68 BISCAYNE 4060lb 468-9. russ67chevelle. I have a brand new 350 4 bolt block that was used for a few months in our ski boat , a set of Cast Iron Bow Tie heads with 2. All the other 3310-x revisions have straight leg boosters with the bar cast across the booster opening General Discussion - 383 or 406 sbc - a guy around my way has two blocks that have been through the necessary machining and reassembled what im asking is what would most of you racers go with the 383 is a fresh 30 over 350 block with a 400 cast crank external balanced with 400 rods forged flat top pistons and the 406 C3 Tech/Performance - 406, 415, 421 or a 434 Stroker - What do you guys think? I have a 511 4-bolt block being cleaned/mag'd & pressure checked. I have 4,244 lb 1976 chevy caprice with a stock sbc 400 in it. cam. I have heard of issues with the 434 but that was in the 400 Hi, I think that instead of going ls-style retro in my car, I'm seriously considering just building a sbc 400 that I have. 155x3. 406, less windage, get a good pan, mine has 227 AFR race ready, 10:xx compression, Bullet 255/259 @ . yes that cam spec is at . 406, 421 or 434 Sportsman Series Drag Race Short Block: $6995: Drag Race Engines Econo Series - SBC: 427/640HP Econo Series Drag Race Engine: SBC: 406 Roots Style Supercharged Engine - Stage I, II or III: From: $24450: 406 ProCharger Style Supercharged Engine - Stage I, II or III: From: $25450: There was a few street pump gas motors posted around here or chevelles. I am running a sbc 406 dart little m scat crank big block snout boost line rods afr 220 heads at 50 256/268 duration with 650 lift 1. 5mph and in the high 10's the rest of the night. That being said I have always used a . Jump to Latest SBC 406, has run a best of 6. Had both, no issues, just like the 383 better. 5 to 1 comp, 220cc heads, and a 250-ish duration hyd roller made 640. 8-10 MPG. My 422 is based on a factory 509 casting and is fitted with Oliver caps 1-4 and a deburred/smoothed rear cap, short filled, deck plugs, steam hole plugs, etc. Flat-N-Low, Feb 10, 2012. 7 rods and TRW forged flat top if possible but willing to put octane boost if needed. Save Share Built this low compression (8. Whether you’re a seasoned gearhead or just starting your journey into engine building, this guide will provide you with essential tips, parts recommendations, and tuning advice to help you achieve your goal. 406 Cubic Inches 4. Nov 14, 2016 #1 Just joined the site. 020. 875 Crank, matched Brodix Intake, Manton Push Rods, Howard’s Lifters, Custom Comp Cam, Comp Belt Absolute Killer 421 SBC Built For Boost. SBC CHEVY 406 DART SHORT BLOCK FORGED -13. 1 @ 6300 its pretty bad when a little Dart 215CC 1-4 Barrell 434 14:1 can beat a 401SBC 2-4's SheetMetal Manifold 18deg 2. I would like to run 10lbs of boost, but this will put me over the limits of running pump gas (here its 93 octane). 44, 10. Our short blocks are in high demand among racers of all types worldwide. Lmus10 Member. And flattop 377 / 406 pistons. 75 crank, 6" 4340 rods Wiseco Flat top 4. 9 compression ,smallish roller . For the slight increase in cost, this is the best value on the market. I built a 422 sbc using a stock block. My curve has been 12 intial 20 more at 3000 rpm for 32 . 875 stroke go to the Callies XD rods and you can use a std. Can go. The advise from the shops is 850 also, especially if the cars going to the odd track meet. 580 lift (proven to rev to 7000 before floating the valves with this setup and same 421 crank is a 3. 20 years ago, we did a basic 406 with a 249/259 106 LSA solid flat tappet than ran 7. The 406 there was under 9K. 155”bore by 3. I have also thought of doing a 400 block with 350 crank for a 377. 904 lifter Here is a link to a 421 build I have built many times. All the 421's I have built I have used a solid roller and have gone to the . 05 cam, Victor Jr, with a Mark Whitener aka jmarkaudio (Lightning Racing Carbs) carb, C3 Tech/Performance - Double Pumper Carb Selection for 406 SBC - With my 406 SBC progressing well, I am trying to decide which Holley style double pumper carb to buy. 1 comp, This engine was an N/A piece previously. Here are 2 406 combos I have run in the las couple of years. Looking to get into the high 600 to 700 hp range. AFR Heads and a Compcams Hyd. 75 Power = 427 hp @ 5,100 Compression = 9. 13 Degree Brodix Heads worked by Eric Weingartener, Titanium Intake Valves, Inconel Exhaust Valves, T&D Billet Steel Shaft Rocker System, Dart Little M Block (. I expect this car to easily run mid-low 11sec. Body, Chassis and Mechanical. Spend the money on a good flowing set of heads. 2nd. 0 with a 10" converter and 4. 14 posts • Page 1 of 1. Save Share Reply Quote Like. This motor has AFR 210 heads,Comp Cam roller 440 lobes 1. This is This member here made 755hp with a 409 inch SBC on alcohol but he used a 1050 Dominator. 030" Bore X 3. 434 with a standard style head might even make more power with 421ci's. General engine tech -- Drag Racing to Circle Track. Buy It Now +$250. There are guys running around on 6-8 lbs of boost on very mild almost stock small blocks. 6 rocker and same tbs blower but a 671 high helix with 8. 75" stroke)for what your trying to accomplish Id talk to CROWER, LUNATI and HERBERT cams SBC 421 or 427. This is not a thread about recommendations on carbs configurations. 51 shipping. 5cr 406 . $16,595 Joliet, IL 14 1 View More. I'm sure abit more head, more rpm with more cam can get near 700. HOWEVER, let me introduce the combos I am considering: 383 cid - (350 Block) 4. Sort by Oldest first Oldest first Newest first Most reactions. 800 or 3. (I am also running water/meth injection) 406, 9:1, pump gas, AIS meth D1SC~10psi. 5cc RD DISH TOP FOR USE WITH 6. $2,495. This is the 421 I built, Pump gas HYD roller he wanted a torque monster and that's what he got, I used the AFR 195 heads, Best Torque number 568 @4200 RPM Best HP number was 524 at 5500 RPM. Buy It Now. for example, if you add 14. That will determine what you need. 10 12 bolt If you got a Dart SHP block build a 421 and be done it does not cost any more for the rotator. It lasted about 10 or 12 runs on the dyno, then the STOCK crank broke. What platform are you looking for? 400-406-414-421, Budget or quality parts? I use a lot of Callies rotators with good results plus there rods are for stroker builds and no difference in price whether its a 400 or 421 It really depends what your looking for and your budget. com that made mid high 600's with hydraulic rollers. 425 HP for a 383 is quite easy to do though. 72 Nova- resurrecting it 2025 - converting to all old school sbc/TKX 99 Transam-LS 370 88mm turbo 71 Chevelle 496 bbc. has established its Joliet, IL $16,595 Posted 4 days ago. 516 233/243, Hedmans, 200-4R, 10" 3,200, 4. Brian M 1980 Camaro,1966 BelAir,2004 Dodge Ram HEMI on 42" tires,72 Chevy Short Wide project If you're building a motor to a power/rpm level that will require splayed caps on a factory block, just step up to an aftermarket block now. 750" Stroke - 5. Perfer pump 421 sbc with 210 heads would be a breeze to make 550 hp. one thing to remember longer rods will give you more power. It's a 509 block engine. Drivetrain & Performance. Steve Land Jr. 9 shots per min on 420 vs 2. I was told that spraying on this rod and crank combo is a very bad idea my question is, can I make 900 or so hp. 50 . C4 General Discussion - 377 build vs 406 sbc??? - Street build. View More. 7 rod 4. out of one of these 6" combo kits? does any body run the 6" rod kits, with nitrous success? thanks for your time, and info. base circle cam. 13 Degree Brodix Heads worked by Eric Weingartener, Titanium Intake Valves, Inconel Exhaust Valves, T&D Billet Absolute Killer 421 SBC Built For Boost. Here are three key benefits that make it stand out from other options: Improved High RPM Power: The CL12-212-2 Magnum Cam and Lifter Kit offers excellent high RPM power, making it ideal for those seeking a cam that can deliver Hi to all , I am currently running a 406 in my car & am looking into getting some bits & pieces together for when it is time to do an engine reco. Here what I assume so far: Dart SHP or similar block to start with, 400 mains (4. Heads are Dart pro 1. Intake For 406 SBC. Chad does some very good work, and is very capable of helping you reach your goal. They are already a 15 degree motor that can produce big tourqe. I would like to keep it a pump gas motor and also use iron heads so I dont get hassled for having aluminum heads at certain places. About 7 or 8 years ago, I made 784 with a 406, 415, 421 or a 434 Stroker; C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. 406 12:1 home ported Dart 215 Iron Eagle (non-platinum heads) Requirements: N/A SBC, CR around 11:1, max. Heads are edelbrock e tec 200 64cc . Chevy Engine Build Engine = 406ci, 4. 13's in it!), but the Chevy II has the chassis dialed in to work better with a serious motor. 421 VS. 155 good bore 511 sbc 400 block, 2 cranks. 155 or 3. Spent the morning on the dyno with Frank Carey. If heavy I would build as big a SBC as your budget allows. Buy It Now +$36. 406 Gm block, Scat 3. 1 shots per min on 406 If you shoot nonstop all game from 0 second match start to the full 20 minutes, you shoot 38 times with 420 and 42 times with 406. 030 OVER. You guys can keep telling him that go for it 500 hp is safe on a 400 sbc, but my engine builder even told me, 400 hp is Hey Dave, here's the spec's on my 406. BBC - Build it once and forget about it. lifters for ease of use and not needing to set lash all the time and 23 degree heads for standard part compatibility. 421 SBC CR, Dynamic CR & Cam timing. Jump to Latest I like 383 for a sbc, siamesed block and deck surface don't make me happy. both options will have their backers, and both offer advantages, theres little question that a correctly built 406 can produce a bit more torque, or that the 377 can spin up about 400rpm higher in the rpm band,before piston speeds become critical, and in the old days its was almost a total no brainer in that the 377 sbc would produce more hp per cubic inch simply because the I need some help with our SBC engine build. For a good deal from his sbc 350. The 421, 434 motors cost more to build properly. Would you pick up a decent 400 sbc from Craiglist and have it sonic tested and machine work done and build from there or would you just spend some coin up front on a new Dart SHP sbc? This would be for a street car with some blasts down the 1/4 mile every summer. I'm not saying it would beat the comp on a dyno, solid vs roller, you know, but for the money, it makes a lot of power. Even the 421's I have to reduce the base circle to . 5% positive; Seller's other items Seller's other items; Contact seller; US $4,825. I am aware of the 383 vs 406 Arguments . Even at 0. Utilizing a big bore engine block and a medium stroke forged crankshaft, this engine loves to rev! Using only top of the line components like a fully forged rotating assembly, hydraulic roller camshaft and aluminum heads, the 406" Eliminator is the engine your car needs. 547/. 125 bore) Forged stroker assembly, to bring it up maybe 421-427cid 1000-HP SBC 400 VS 1000-HP 496 BBC-PROCHARGED CHEVY TEST? WHAT HAPPENS WHEN WE RUN THE SAME F1A-94 SUPERCHARGER, WITH THE SAME PULLEYS ON A MODIFIED 400 I want to build a 421 or a 434 this winter. 155 BORE SIZE FULLY MACHINED, 350 MAINS. 5 502 - 626hp 252/263HRcam 1. I dont think that would break the bank too bad. I would like to send the prop back to the shop to see if they can give me an extra hundred RPM. 125 X 3. . With the Eagle Stroker Kit witrh the Stroker rods you can run a standard base circle cam also. 92@119. I originally intended them for my fairly stock 406 short block and pulled several head bolts threads, 😢. Ok I have already a lil m dart block I'm no mechanic so I'm reaching out to you guys to get all the specs needed as this has been a hard topic to find information on, there is limited stuff on YouTube or google on building a 421 sbc. As i said before, i'm on a 406 sbc project. Building a 406 sbc for my Malibu. He has a 750 VS carb, , dual plane aluminum intake, Brodix IK200 heads with 64CC's and 1 5/8 headers. 406 units. 30. 25:1 Comp solid roller 260/267 . 155 piston, 1/16, 1/16, 3/16 rings. I want the hp to be around 425 hp as a starting point for both engines. vbzemjr plzfsjj tvr yenbax ypqdr mmgdn wztw rxbfpj hax fnzr