LS Stroker
Thread Starter
Teching In
Joined: Jan 2010
Posts: 40
Likes: 0
LS Stroker I am building a 69 chevelle, doing a conversion, I can't stand the thought of not putting a 396 ci or bigger in my factory bbc car. So naturally, I have a few questions regarding building an LS big inch motor.
I have done some research and found that I can't use a 5.3 if I want to have a bigger bore then a 3.908 or about and that's if I only build this thing one time because it won't go any bigger if I wear it out. So then, naturally one would jump to a LQ4/9 block. But then a 396 ci is out unless some one out there makes a crank for it. Does anyone make cranks that are not 3.622, 4.000, and 4.125. I can't find one.
The stock 396 bbc is a 4.095(?) bore and a 3.760 stroke. Why hasn't anyone done this with an LS block before? It seems to me that you would get the same CIs as the old engine for nostalgia purposes and eliminate piston slap at the btdc of the stroke that you get with the 4.000 stroke.
Am I missing something or has no one ever done this because there are no parts out there? Does anyone make a crank that is 3.760ish and a piston that is a 4.095ish size?
Thanks guys.
I have done some research and found that I can't use a 5.3 if I want to have a bigger bore then a 3.908 or about and that's if I only build this thing one time because it won't go any bigger if I wear it out. So then, naturally one would jump to a LQ4/9 block. But then a 396 ci is out unless some one out there makes a crank for it. Does anyone make cranks that are not 3.622, 4.000, and 4.125. I can't find one.
The stock 396 bbc is a 4.095(?) bore and a 3.760 stroke. Why hasn't anyone done this with an LS block before? It seems to me that you would get the same CIs as the old engine for nostalgia purposes and eliminate piston slap at the btdc of the stroke that you get with the 4.000 stroke.
Am I missing something or has no one ever done this because there are no parts out there? Does anyone make a crank that is 3.760ish and a piston that is a 4.095ish size?
Thanks guys.
https://ls1tech.com/forums/generatio...o-i-begin.html
Not too many budget options, but it can be done with a 4.100" bore and 3.750" stroke crank. Nostalgia isn't cheap.
Not too many budget options, but it can be done with a 4.100" bore and 3.750" stroke crank. Nostalgia isn't cheap.
Trending Topics
Why not build a more common 402 and then just tell everyone its a .030 over 396? GM did this in several cars, badged them as 396 or even 400 and then installed a 402. If the General could pass it off, why couldn't you? (I know, I know... you would always know the difference, I totally get it.)
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Can you run the Manly 4.100" crank in a 5.7 block at .030" over...???
397...but you could call that a "396"
I know my 1970 SS "396" actually came with a "402"...
Which would be the 6.0's 4.00" stroke with a 4.00" crank...???
397...but you could call that a "396"
I know my 1970 SS "396" actually came with a "402"...
Which would be the 6.0's 4.00" stroke with a 4.00" crank...???
Thread Starter
Teching In
Joined: Jan 2010
Posts: 40
Likes: 0
[QUOTE=TimE;19201007]Why not build a more common 402 and then just tell everyone its a .030 over 396? GM did this in several cars, badged them as 396 or even 400 and then installed a 402. If the General could pass it off, why couldn't you? (I know, I know... you would always know the difference, I totally get it.)[/QUOT
I have thought about that as well. 4.000 bore and stroke would be cool. But then I'd have to find out buy a new block. And still have the issue of piston slap.
I have thought about that as well. 4.000 bore and stroke would be cool. But then I'd have to find out buy a new block. And still have the issue of piston slap.