big stroker
Thread Starter
Heel & Toe
Joined: Jan 2008
Posts: 24
Likes: 0
big stroker
im looking to up the cubes on my 85 l98, and im a go big or go home type of guy. i want to try something like this... http://www.summitracing.com/parts/SC...I/?image=large . i know that this is going to require alot of work, but can anyone tell me what else ill probably need to replace, and/or if this block can even take the kind of power that will produce.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
http://www.summitracing.com/parts/SCA-1-40900BI/
but relatively expensive and requires more grinding work on the block for clearance which is why everybody builds 383's
A 383 can be built for $300 more than rebuilding a 350.
http://www.summitracing.com/parts/SCA-1-40610-1/
Last edited by rodj; Sep 22, 2009 at 12:10 AM.
Pro
Joined: Mar 2000
Posts: 658
Likes: 7
From: Perth Amboy New Jersey
im looking to up the cubes on my 85 l98, and im a go big or go home type of guy. i want to try something like this... http://www.summitracing.com/parts/SC...I/?image=large . i know that this is going to require alot of work, but can anyone tell me what else ill probably need to replace, and/or if this block can even take the kind of power that will produce.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
I agree with CFI-EFI, HUH??? Do not drink and post...
I run a 408 (4" stroke), and have built multiple 421s (4.125" stroke) in the factory blocks. And while it can be done, it requires higher end rods (i.e. Oliver's, my preference), which really places these builds out of most people's budgets.
Most would be satisfied with a nice 383 build...
I run a 408 (4" stroke), and have built multiple 421s (4.125" stroke) in the factory blocks. And while it can be done, it requires higher end rods (i.e. Oliver's, my preference), which really places these builds out of most people's budgets.
Most would be satisfied with a nice 383 build...
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Michael S. Palmer
Team Owner
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From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Race Director
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From: The Top of Utah
RACE ON!!!
Le Mans Master
Joined: Oct 1999
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remove material from the bottom of the cranks rod journal, keeping the journal round, thus making a smaller diameter crank journal, and needing a smaller rod journal to make up the difference.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
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From: Australia
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
As to your original comment, I think it would have been easier to understand if it was stated as the journal diameter begins to become quite small (vs the rod journals getting narrow).
I was just funning with ya!
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
You can use a 4.00" stroke X 4.030" bore and make a 408.2 or 409 ( NHRA rules) depending on how you want to look at it. I have done several along with Aaron (AKS Racing). The geometry is the same as a 434. It is a proven engine combo, but you should use good parts (expensive). It all depends on how much money you want to throw at it. 383's can be built for dirt cheap.
A 4.125" stroke is a whole different deal.
A 4.125" stroke is a whole different deal.
Thread Starter
Heel & Toe
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Le Mans Master
Joined: Feb 2005
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From: The Motor City
Your friends probably think you are talikng about a big block 454.. TPI 421 Vette and AKS both have bigger inch sbc's in their cars. TPI 421 vette is a 450 c.i. (if I recall correctly). The aftermarket blocks (sbc) are capable of big c.i. and will fit the standard motor mount locations. As everyone has said the parts list will be pricey. If you're willing to go that far you may want to consider a complete custom instal. Then the sky would be the limit.....a basic 572 bbc, or maybe a Sonny Leonard 980 c.i. or ??
Last edited by mseven; Sep 23, 2009 at 04:01 AM.
Le Mans Master
Joined: Aug 2000
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From: Australia
Thread Starter
Heel & Toe
Joined: Jan 2008
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im looking for something slightly more streetable than a 2100 hp 89000 dollar engine, but thanks for giving me something else to drool abt