Differences in LT1/LT4 short block

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May 7, 2009 | 07:57 PM

#21

pushrod-v8

Drifting

Joined: Apr 2007

Posts: 1,291

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From: Chicago IL

Quote:

Originally Posted by cheetah

Why?

yes, its "technically" incorrect, but aside from the reverse flow cooling system and opti spark, its basically the same block. Of course there are other minor differences, but it is basically the same block.

The LS1 engine is totally different block from top to bottom. Completely new design, completely different all around from a to z. Big difference.

*edit* and this is excluding the LT5 from the '90 to '95 ZR1 Corvette.

May 7, 2009 | 08:28 PM

#22

BlackHarleyMan

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Joined: Jan 2006

Posts: 1,740

Likes: 2

From: Winchester Virginia

Quote:

Originally Posted by pushrod-v8

I always refer to the SBC up until the ls1 came out as a 1st gen small block.

It's still the Gen-II Block, no matter how you call it, if it walks like a duck and quacks like a duck, then 9 times out of 10......It's a Duck!

Noland

P.S. The LS1 motor is a Gen-III

May 7, 2009 | 08:35 PM

#23

pushrod-v8

Drifting

Joined: Apr 2007

Posts: 1,291

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From: Chicago IL

Quote:

Originally Posted by BlackHarleyMan

It's still the Gen-II Block, no matter how you call it, if it walks like a duck and quacks like a duck, then 9 times out of 10......It's a Duck!

Noland

P.S. The LS1 motor is a Gen-III

quack quack....

it's a duck!

May 7, 2009 | 08:58 PM

#24

BlackHarleyMan

Drifting

Joined: Jan 2006

Posts: 1,740

Likes: 2

From: Winchester Virginia

Quote:

Originally Posted by pushrod-v8

quack quack....

it's a duck!

Yes Sir, that there is a Good Ole American Duck!

May 8, 2009 | 08:57 AM

#25

BrianCunningham

Team Owner

Joined: Mar 2001

Posts: 30,847

Likes: 293

From: Boston, Dallas, Detroit, SoCal, back to Boston MA

This guys selling his stock crank

http://forums.corvetteforum.com/c4-f...nterested.html

May 8, 2009 | 12:35 PM

#26

96lt4c4

Pro

Joined: Nov 2005

Posts: 536

Likes: 0

From: Bardstown Kentucky

I have a stock LT4 crank with 50K miles on it lying in the top of my garage if you are interested. Its in good shape. The only reason i tore the motor down was to build a 383. It was suppose to just be a cam swap.....

May 8, 2009 | 01:07 PM

#27

pianoguy

Thread Starter

Safety Car

Joined: May 2007

Posts: 3,651

Likes: 10

From: Apple Valley MN

Thanks for the leads on a crank - I'll keep that in mind!

May 8, 2009 | 11:27 PM

#28

tpi 421 vette

Melting Slicks

Joined: Mar 2002

Posts: 3,108

Likes: 126

From: S.L.C. UT

Personally, if your going to tear it apart, why not do a 383. You can build one as cheap or cheaper these days than a 350. Especially if you have to by pistons. And the torque improvement with a 383 is huge.