How Big Can A SBC Get?
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
don't know if this helps.
http://www.hotrodders.com/forum/sbc-...-a-116385.html
http://www.hotrodders.com/forum/sbc-...-a-116385.html
Last edited by pologreen1; Aug 6, 2009 at 01:52 AM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Off the shelf 454 SBC ;600Hp / 585ft/lb on pump gas
$12K w/ 2yr warranty
http://www.theengineshop.com/product...e-engines.html
http://www.hotrod.com/techarticles/e...ine/index.html
$12K w/ 2yr warranty
http://www.theengineshop.com/product...e-engines.html
http://www.hotrod.com/techarticles/e...ine/index.html
Last edited by rodj; Aug 6, 2009 at 08:14 AM.
Team Owner
Joined: Oct 2006
Posts: 20,393
Likes: 431
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17
NCM Member '09
Off the shelf 454 SBC ;600Hp / 585ft/lb on pump gas
$12K w/ 2yr warranty
http://www.theengineshop.com/product...e-engines.html
http://www.hotrod.com/techarticles/e...ine/index.html
$12K w/ 2yr warranty
http://www.theengineshop.com/product...e-engines.html
http://www.hotrod.com/techarticles/e...ine/index.html
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
I run a 408 (some would call it a 409, but it really is a 408.17cid) in a factory L98 block for many years. I have also built a pair of 421s in the same L98 type block, but would not recommend it (way too much clearance work and high dollar parts).
I have a 447 in a 400 based block, but again some expensive parts. There are many aftermarket alternatives that make these large cube builds much easier. I think Jim has the same basic config but with a larger bore (0.010 larger bore) that sits at 450CID. That is the largest that I have seen in the vettes (of course not including BBCs).
And if i had to do it again, I can add additional boost easier than putting together a super exotic build with more cubes. Boost overcomes cubes easily.
I have a 447 in a 400 based block, but again some expensive parts. There are many aftermarket alternatives that make these large cube builds much easier. I think Jim has the same basic config but with a larger bore (0.010 larger bore) that sits at 450CID. That is the largest that I have seen in the vettes (of course not including BBCs).
And if i had to do it again, I can add additional boost easier than putting together a super exotic build with more cubes. Boost overcomes cubes easily.
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Verdad Gallardo
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Look at the quoted $$$ some of the guys here have in their smaller cube engines. Close to 10K is not uncommon.
You think you are saving $$ by building your own , but when you add up what you actually spent
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
less to buy one done unless youre stuck on DIY;just ignore how much its really going to cost..sunk 12k into a lousy 350, was shocked when I added it all up.
The margin these days is tiny so they have to crank them out in volume.
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
limit on bore size is about 4.090 for some lt1 blocks, and 4.065-4.070 for some L98 block. Note I said some not all.
Crank limit seem to be 4.00". Still need stroker rods, but most rods will work. 4.00" also requires triming of the block to clear the 4.125" is possible using every trick in the book.
BUT CI DOESN"T GIVE YOU POWER!!!!! stroker help flow restricte parts get more torque at a lower RPM. Get some HEAD, then CAM, then intake, then exhaust, then power will be yours.
"So Wes why do you have a 427ci SBC?" I am purposely using Race heads (ported AFR 227cc) which I want all of it available at lower RPM vice 7500 rpm. I am using a much smaller cam (10 deg less) as well to be sneaky
