What do you think it would cost? Was thinking of a good street motor with some stirp time. An EFI set up. Iron block with iron or aluminum heads. Can someone give me any insight to how much it would be to build one?>

 

You could get a big block and have it refreshed..

I think theres a strocker kit for the 400 sbc that gives u that ..

Or fing an old rocket block.. was designed to use chevy crank-rods

according to the lingenfelter book.

The big block probably has a steel crank already ..

 

spec... it would be very hard to make a small block out of a big block!!!! hehehe. The reason I wana small block because i like the nice size of it and it wont get another look.. a sleeper kinda car... but will push near 400 to 500hp. anyone else have any input? Cant I use a regular small block 350 and bore/stroke it out?

 

Old saying "If you have to ask the cost of it, then you can not afford it". Any 427 gone to cost Big Big Bucks. So if you want one be prepared to spend some serious money.

 

money isnt a problem really.. im not gunna rush into this at all. this is gunna be at least a 10 year project as I am in college. I just want to know because i have seen several people on these boards with small blocks bigger then 383 and i just want a guestimate and any advise on how to save money if i can. I dont wana pay 24k for an engine that is really worht 4k. got me?

 

The biggest part of the cost is the 400 block (GM or otherwise) and the 4" stroke crank. You'll probably wanna go with 6" rods too, just to keep it in one peice when you get a little too enthusiastic

Lunati makes a 4" stroke crank, but its something like $1500 i think.

 

hope this helps you a little.. http://www.speedomotive.com/CHEVY%20...ANK%20KITS.htm
Im sure better or worse prices can be found if you look.

CHEVY 421 RACING ASSEMBLY

FOR GM 400 BLOCK OR AFTERMARKET DART LITTLE "M" BLOCK
ALL FORGED RACING ASSEMBLY

$1795.00

EACH KIT INCLUDES:

JE 23°DOME TOP PISTONS WITH RAIL SUPPORTS ( SOLID DOME CAN BE MODIFIED )
COMP. RATIO: 58cc =14.2-1, 64cc =13.2-1, 76cc =11.4-1
PLASMA MOLY FILE TO FIT RING SET
FORGED 4340 6" LONG H-BEAM CONNECTING RODS
FORGED 4340 3.875" STROKE CRANK ( 350 MAIN SIZE FOR BOWTIE BLOCK )
CLEVITE 77 "H" OR FEDERAL MOGUL PERFORMANCE CHAMFERED BEARINGS

PEAK TORQUE =561 @ 5000, PEAK HP 605 @ 6500
-----------------------------------------------------------------------------------

SMALL BLOCK CHEVY~~481 CUBIC INCH ALL FORGED CRANK KIT

THIS CRANK KIT REQUIRES A DART IRON EAGLE TALL DECK BLOCK. ALL BRAND NAME PARTS WITH CUSTOM PISTONS ALLOWING YOU TO DESIGN YOUR OWN COMPRESSION RATIO

481 CUBIC INCH FORGED CRANK KIT $2725.00

EACH KIT INCLUDES:

4340 FORGED 4.125: STROKER CRANK LITE-WT. 52# HEAT TREATED, NITRIDED AND 4 LIGHTENING HOLES
4340 FORGED 6.250" H-BEAM RODS WITH 7/16 ARP CAP SCREW BOLTS, FULL FLOATING
CUSTOM FORGED 4.310" PISTONS, LITE-WT. CNC MACHINED, FORGED PIN OILERS, DESIGN YOUR OWN COMPRESSION RATIO
TOTAL SEAL TSI RACE RING SET
CLEVITE H-SERIES MAIN & ROD BEARING
BORE=4.310"
STROKE=4.125"
ROD LENGTH= 6.250"
ROD RATIO= 1.52
BLOCK HEIGHT= 9.325"

-------------------------------------------------------------------------------

SBC 450 CUBIC INCH DAILY DRIVER CRANK KIT

A STREET RODDER'S GREATEST DREAM~~~450 CUBIC INCHES SMALL BLOCK CHEVY ENGINE ON PUMP GAS AS A DAILY DRIVER. THIS BUILD REQUIRES A DART IRON EAGLE TALL DECK BLOCK.



ALL FORGED 450 CID CRANK KIT $2350.00

EACH KIT INCLUDES:

4340 FORGED 4.125 STROKER CRANK, LITE-WT. 52# HEAT TREATED, NITRIDED AND 4 LIGHTENING HOLES
4340 FORGED 6.125" H-BEAMS RODS WITH 7/16 ARP CAP SCREW BOLTS, FULL FLOATING
JE/SRP FORGED DISH TOP PISTONS~~ ZERO DECK COMPRESSION RATIO: 76cc 10.1, 72cc 10.48-1, 64cc 11.3-1, 58cc 12-1,
SPEED PRO MOLY RINGS
CLEVITE H-SERIES MAIN & ROD BEARINGS
BORE= 4.165"
STROKE= 4.125"
ROD LENGTH= 6.125"
ROD RATIO: 1.49
BLOCK HEIGHT=9.3125

-----------------------------------------------------------------------------------

415 CID 500 HP MAXI MOUSE
THIS STROKER IS ONE OF OUR MOST POTENT POWER COMBINATIONS. BIG TORQUE AND HORSEPOWER WITHOUT THE HEAVYWEIGHT. OVER 450 LBS./TORQUE BELOW 3,500 RPM AND WITH DEEP DISH PISTONS RUNS ON PUMP GAS. A GREAT STREET / STRIP COMBINATION. 400 SBC STROKER CRANK KIT.


HYPEREUTECTIC PISTON CRANK KIT

$1049.00

EACH KIT INCLUDES:

HI-NODULAR 3.832 CAST STROKER CRANK
5.7 STAGE 1 GM RODS WITH ARP WAVE LOC BOLTS
KEITH BLACK DISH HYPEREUTECTIC PISTONS
COMP. RATIO: 58cc =10.8-1, 62cc =10.5-1, 64cc = 10.2-1, 76cc =9.4-1
SEALED POWER CAST RING SET
CLEVITE TRI-METAL ROD & MAIN BEARINGS

--------------------------------------------------------------------------------

There are quite a few way you can get what you want.

 

i guess that 421 would need the block to be bored over to get 427? wow... that is a lot of compression!!! even for teh 76cc heads. Wow, thats really not bad. now to find a 400 block!! i guess bore over .030? maybe i wont get the dome pistons, just regular flat top's.
thank you again... TPI383 you rock man...

 

Alex my friends brother has a 71 chevelle with a custom 427 sbc puttin out over 550hp at the flywheel and somewhere near like 475 or more i think ft. lbs of torque. the motor has cost him so far 8-9,000 and right now he's having the motor rebalenced becuz something get messed up. just something to think about.

 

oops.. sorry.. my bad..

The olds rocket block can be brought up to
468 cu.in, thanks to its 9.325 tall deck.

its heavy.. 200 lbs.

its designed to use chevy crank-rod -camshaft and head.

I would build a rocket block over a 400...

But they're rare... so the 400 wins I guess..

 

A small block 427 won't cost you too much more than a high quality 350 build. A small block 427 has a 4.125 in. bore and a 4in. stroke. The hardest part would be finding a stock cast iron block that has the thickness in the cylinder walls to allow you to bore it out that much. Other than that, the cost would be driven up or down depending on the parts you used. Obviously it will be more expensive than just a 350 but if you play it smart, I would think that 8k-10k on the engine would be a good estimate if you are using all new parts. If you use rebuilt/referbished stock components where ever you can you'll save alot. I would suggest you read "How to build max performace small block chevrolet engines on a budget" by David Vizard. Good luck.

 

That's the stock 400 bore, no overbore.

It's unlikely that one would build a 427 with a used block. Most likely it would be a 434, which is a .030" over 400 block.

Cost would depend on how much of the work (grinding etc.) you do yourself. The crank, rods & pistons will run about $2200-2500 for street-grade parts. Of course, there are plenty of ways to spend more than that. A certain amount of machine work and grinding will be necessary, and a small-base-circle cam might also be needed.

 

Using an aftermarket block such as the Dart little M or a World Products motown. Put all aftermarket quality name brand internals in it & you will be over ten grand "pan to heads " not including the cost of the intake & fuel delivery system"
Trust me, I have the receipts to prove it

Bruce