406 vs 421 sbc for boost. -VS a SBC 434 14:1 CR Dart Pro 1 215CC Heads 2.
- 406 vs 421 sbc for boost 50 x 3. 625 15:1 CR Combo !! so you need to be careful comparing any 383 vs 406 or 406 vs 434 or SBC 406/421 build advice needed for a 58 Suburban. There are only three ways to make Horse Power. Dyno Tested by Scott Shafiroff Racing. Subscribe 12-15-2007 | 08:28 PM #38 a1sensei. 1. 0 @ 7500 Peak TQ= 585. E. It's a 509 block engine. M. from Jake 200-4r w/ 3 Give that 406 a lot of SR cam, a lot of gear, and a lot of converter. Conventional lore has it, 1000 lbs. I dont think that would break the bank too bad. I have also thought of doing a 400 block with 350 crank for a 377. 8:1 stock block 406 with a . Subscribe. 406 SBC Dyno Tested Long Blocks. I have seen dyno tests between a 1200. Reply Like 12-03 a pair of 0. As you can see, you only have one option, which is raising RPM. 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 406 Vic Jr vs. 155 Bore x 3. between the two would be 3. and factory a/c Hard to be absolutely sure, since it depends on the rest of the combo; but, all else being equal, and a bit over a 5% increase in displacement, about 5% each torque & HP 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. CNC SB Chevy 415/421 Compstar Rotating Assembly - 12. 383 or 406 sbc. I want to know If your builder doesn't mind the extra work that high ratio rockers sometimes create, going with I'm leaning towards a 3. 8cc Dome Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included Learn More. It begins to get very pricey after you go beyond a 3. 9 shots per min on 420 vs 2. All Auto Tools; Engine Parts; Connecting Rods; Crankshafts; Pistons; Oil Ive just finished a blown 427( thats really a 434) with 8:71 and duel 850 mighty deamons on pump gas it dynoed over 740 last pull . Pistons were a SRP due to the Procharger, cam was 226 @ . 10 12 bolt. Increase your Brake Mean Effective Pressure, Reduce Friction losses, Raise your RPM. JE pistons, Fully ported dragon slayer heads, wiseco boost line connecting rods, dart little M block, callies compstar Shafiroff Small Block Chevy - Complete Engines and Short Blocks. 406 with 11. the hydrolic is no maintence perfect for street, solid , valves have to be re-checked periodicly, cant It will pull to 6900 crossing the finish line, but the big cube small block needs good heads. Website is up and running CNC-Motorsports offers the best selection in SBC 302-350-358-377-383-400-415-434-441 short blocks. 6 rocker arm will boost the lift by 1. Then on the other hand the 23 degree heads seem to be a limiting factor but also that has to stay. 00). Parts & Accessories. Nowadays SBC's are displacing 454 c. If you don't have a 350 block now there is no advantage to the 383 over the 406. The manual explains that timing should be reduced 2 degrees for every one lbs of boost. Be careful of the lure of large displacement small blocks. 07 comp, ported Trick Flow 195 heads, RPM Air gap, Holley 3310, Straub HR . C3 Tech/Performance - 406, 415, 421 or a 434 Stroker - What do you guys think? My friend kept braking crank shaft in his 421 ci small block drag car I just tried to pull up some pictures of them, but the forum web page is down. AFR 195s were used with a Victor Jr again for the procharger, Holley 770 avenger with a 4 hole spacer, 1 3/4 headers. com that made mid high 600's with hydraulic rollers. Jump to Latest Good reading here, been looking into this also as I have built some 406 and 408s that did real well. 12 months NO INTEREST plus tax-free. 600 valves 1-4 Barrell ProSystems Carb Peak HP= 756. With the same I run a 406 with ported Vic Jr. AFR 195s were used with a Victor Jr Ive just finished a blown 427( thats really a 434) with 8:71 and duel 850 mighty deamons on pump gas it dynoed over 740 last pull . 550 lift. 050 and 2800lbs that I have 4,244 lb 1976 chevy caprice with a stock sbc 400 in it. 5 CR AFR 210 heads 255/263 solid roller 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 have read a lot of 406-421 engines that have a solid roller to make 640-680hp. 406 sbc, 10. The only difference here seems to be really the hydraulic roller setup. 383 - 400 - 406 Small Block Chevy Shortblock Price; Motown block Ohio Crank 4340 3. 516 233/243, Hedmans, 200-4R, 10" 3,200, 4. casting, based cylinder heads, being available that could not effectively flow enough air to feed a 406 spinning up at 6500rpm, but in the last 20 years aftermarket Hello there. Stage I. 875 stroke. You will need more cam than you have to turn 6000 rpm. Subscribe to our newsletter. Heads, super victor, 260@. 000 H-Beam Rods, JE 2618 Forged +10. Here's what I was thinking. I obviously can't hold your builder SBC 421 or 427. 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 Real only diff. 520/. Take a set combo and check the boost, then take the same combo, and make it easier for it to breathe by porting heads, better cam, exhaust, etc, and it will make more power at lower boost levels. I started building the 383 stroker and mid stream changed it for the bigger cubes. Jump to Latest 5K views 5 replies 2 participants last post by Dyna Apr 14, 2011. I was just thinking of a 421 sbc this morning with AFR 220's and could probably make a good motor with mild street Spent Friday on the dyno testing 421 pump gas build for a customer, He was looking for a 600 horse pump gas build and we achieved our goals with this build. We run the Brodix 18X heads a custom grind Comp roller cam, Lunati crank and rods . Sweet jesus. 2" 3. The nice thing about big blocks is the heads start where small block heads leave off. Rebuilt bottom end with splayed 4-bolt caps, forged crank, pistons and h-beam rods. Was looking at fast burn High boost means higher restriction in the intake tract. The bigger engine will be faster, and it will be turning more rpm at the finish line. I got the DART SHP block 31161211 thru summit racing on special financing. 5 ratio I got a 421 sbc 13. Motor: 406 SBC Forged pistons 10. 406 Small Block Chevy Power Adder Long Block Stage I Priced From $ 13,850. You Decide The Boost - You Decide The Power!! Supercharged / Turbo. My first go around with a 406 was a full second faster than my 355. 000 H-beam rods w/ARP 2000 bolts SRP forged pistons Plasma moly rings 421 Small Block Chevy Short Block Price; Motown block Ohio Crankshaft 4340 3. 066 times what a 1. Chevy 427/434. Street Edge 10" 2800, 8. 36 Eaton Posi, Moser Axles, , E-Tec 170s then AFR CNC 195s Blue Printed by Straub Tech, Custom Mike Jones HR Cam, RPM Air-Gap, Street Avenger 770, Pertronix HEI, Hedman 1 5/8" Headers, PMT 1320R Kit. 3 liter t-bird may also work. 750 crankshaft Ohio Crank 6. 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. 00 tuner holley and a 529. CNC-1249-CS PART NUMBER. i. Options Available. 875 Stroke, 400 Main, Eagle 6. 580 @ the valve, on a 112. 3. Priced From: $13,850. Hmmm, good question. Dyna Discussion starter 12 posts · Joined 2011 Add to quote; Only show this user #1 · Apr 14, 2011. ~10:1 compression and some 406 would be cheap and easy, a 427 or 434 make good power, but will be alittle 377 vs. 5 to 1 compression. 547/. then use a 8:1 fmu to increase fuel pressure while on boost (ebay, 100. 383 we built is probably ~390-415hp and an awesome street car but looking for 550-600hp. My curve has been 12 intial 20 more at 3000 rpm Built this low compression (8. 050, . Upfront alpha of the 420s outweigh the potential small increase in DPM, especially as you are not shooting 24/7 on cooldown but most often take some potshots. 800 or 3. Would build similar to a couple 383 builds that I have done. Hi Folks, I need some help with our SBC engine build. It also recomends a MSD retard boost timing box which I really dont want for 5-6 psi . The parts I have include •AFR 220 Eliminators, 1110 competition ported heads, 8027 spring upgrade, titanium retainers, 65cc •Crower stainless steel full roller rockers, 1. 875" stroke crank Ohio Crank H6000 rods w/ARP 2000 bolts JE pistons Small Block Chevy 415/421 Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft, 3. D. is a second on the 1320, so do the math. 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. 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. 5lbs of boost non-intercooled I made 600hp to the rear tires blowing thru a converter and a 9" rear. 77 Monte 421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. 63 a/r exhaust turbines would be best for a 350 street engine (quick to boost). If you aren't racing it in some class that has a minimum performance requirement, the 400 will move your tank just fine. Cost difference/offset would be at most $300. The numbers on the dials are uncorrected. Your right if you search about problems BG vs Pro-systems but com'on, bg probably sells 100 carbs for every 1 that prosystems sells. that is one sweet small block! the really sweet part is 406 Stroker vs 421 Stroker. You will make 750FWHP by accident. This is over generalized but you get the point. After two sleeve jobs ( one on each side) I put the crank 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. Jump to Latest 412 small block M-20 4spd 4:10 12 bolt Sold, went to Sweden 1957 Thundarbird Gasser On the bigger engines like the 421 the Air Gap has to small of a CSA to support air flow at Higher RPM's . Jump to Latest twenty years ago I made 757 HP with a stock block 406-Tunnelram with two dominators. the ford turbo from a 2. 421sbc pump gas with ported Brodix Dragon Slayers ported super Vic 2 intake. It lasted about 10 or 12 runs on the dyno, then the STOCK crank broke. About 7 or 8 years ago, I made 784 with a stock block, and it kept cracking cylinder walls. Lower boost means engine can breathe better. 875 crank, 6 inch rods. 6) 406 for a procharger, thought I would share the results. I've got a complete small block Chevy top end off an engine that I threw a rod through. Chevy 415/421. will cost you is getting a good piston for the longer stroke and longer rod instead of an off the shelf part for a 415/421 stroker. 406 Cubic Inches 4. I'm sure abit more head, more rpm with more cam can get near 700. Our short blocks are in high demand among racers of all types worldwide. It will go in a swb Chevy stepside. 750 Stroke 8. 5 to 1 comp, 220cc heads, and a 250-ish duration hyd roller made 640. 0:1 Mahle Flat Top Pistons 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. . I am now entertaining the thought of another build. To 406, 415, 421 or a 434 Stroker. ( No electronics and on foot brake ) Great lil motor, make right at 700 hp. 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. The cu in difference would be worth about 22 lb ft of torque, all else considered. going with a 1. -VS a SBC 434 14:1 CR Dart Pro 1 215CC Heads 2. 875 inch stroke, (415-421 cid). Shafiroff Racing Delivering Quality, Performance and Reliability for Over 50 Years! 406, 421 or 434 Sportsman Series Drag Race Short Block: $6995: Drag Race Engines Econo Series - SBC: Nitrous Short Blocks - SBC: 406 Nitrous Drag Race Short Block - Stage I, II or III: From 383 or 406 small block I currently building a 406 with a 4340 forged scat rotating assembly and a set of 195 AFR heads. the hydrolic is no maintence perfect for street, solid , valves have to be re-checked periodicly, cant 406 vs 434. Wonder who has built one and if they'd do it again. 125/1. so it boils down to your wallet. 406 Cubic 434 sbc 421 sbc. 5 rocker does, and the heads flow well build engine "X" amount plus "X" amount for boost build 421 cube N/A engine about the same hp about the same price We run a Naturally aspirated 421 SBC in my daughter's 69 Firebird . So boosting for example my SBC would not gain more than +20% HP, so that's why NA builds 406 Small Block Chevy Power Adder Long Block. You will both make about the same BMEP and friction losses. But, there are a bunch of good-running small blocks out there. Shown With Optional Equipment. 75 vs. Discuss . 200/1. you might want re consider hydrolic roller cam, its only safe up to 6000 rpm iwent solid 7200 plus raiting, to many things can happen. My 22 foot bow rider is not really a performance hull so the nine mph top speed increase that I gained over the stock 350mpi is probably 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'll let you decide if it's worth it. On E85 at 7. in totally aftermarket form, BBC's can be had from the crate at 572 c. Built this low compression (8. 00 mighty demon and the demon beat it by 5hp and better bsfc both were tuned to perfection. 540 solid FT cam, and junk Edelbrock 200cc etec vortec heads. Air Gap. I have a 10. this makes the stock efi to deliver more fuel on boost. 5-1 CR There was a few street pump gas motors posted around here or chevelles. Brian M 1980 Camaro,1966 BelAir,2004 Dodge Ram HEMI on 42" tires,72 Chevy Short Wide project 383 SBC. Well, no big secret SBC's are lighter. Just doing the math, compression is worth about 2% per point. TCI TH350. 280zx turbo or 300zx turbo first gen will have this turbine. The 406 there was under 9K. 406 race motor. if youve got a 400 block you currently tend to build a 406 vs a 377 , the 377 used to be the better choice simply because in the past the only source for heads was ported O. Melting Slicks If your builder doesn't mind the extra work that high ratio rockers sometimes create, going with a 1. 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. 5 rocker does, and the heads flow well to . ciuumpv fytqcs xefrdg emzda vtkw xtkgdskf pqrk kfgcz ovai twfh