Difference in B-body LT1 blocks
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
Difference in B-body LT1 blocks
I'm looking for a new LT1 due to a spun bearing (see other thread: http://forums.corvetteforum.com/show...56&forum_id=48)
I found a few B-body LT1's locally. A forum member mentioned that there are two versions of that motor, one is not a true 350. Can someone point out the differences so that when I take a look at these motors I can ensure I'm looking at the right one?
Thanks!
I found a few B-body LT1's locally. A forum member mentioned that there are two versions of that motor, one is not a true 350. Can someone point out the differences so that when I take a look at these motors I can ensure I'm looking at the right one?
Thanks!
Team Owner
Joined: Oct 1999
Posts: 31,977
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Originally Posted by ScaryFast
I'm looking for a new LT1 due to a spun bearing (see other thread: http://forums.corvetteforum.com/show...56&forum_id=48)
I found a few B-body LT1's locally. A forum member mentioned that there are two versions of that motor, one is not a true 350. Can someone point out the differences so that when I take a look at these motors I can ensure I'm looking at the right one?
Thanks!
I found a few B-body LT1's locally. A forum member mentioned that there are two versions of that motor, one is not a true 350. Can someone point out the differences so that when I take a look at these motors I can ensure I'm looking at the right one?
Thanks!
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
Thanks for the info. If the motors are assembled so that I can't measure the bore are there any other signs or markings, numbers, etc on the block I could see?
For a stock HP motor is it necessary to go to the 4 bolt? I'm going to turn my current 4 bolt motor into a stroker, this one's just to get me by.
Thanks again.
For a stock HP motor is it necessary to go to the 4 bolt? I'm going to turn my current 4 bolt motor into a stroker, this one's just to get me by.
Thanks again.
Team Owner
Joined: Oct 1999
Posts: 31,977
Likes: 487
From: Guinness Its whats for B'fast JAWGA
CI 3-4-5-9 Veteran
Originally Posted by ScaryFast
Thanks for the info. If the motors are assembled so that I can't measure the bore are there any other signs or markings, numbers, etc on the block I could see?
For a stock HP motor is it necessary to go to the 4 bolt? I'm going to turn my current 4 bolt motor into a stroker, this one's just to get me by.
Thanks again.
For a stock HP motor is it necessary to go to the 4 bolt? I'm going to turn my current 4 bolt motor into a stroker, this one's just to get me by.
Thanks again.
Sorry I can't help you out on telling the L99 apart from the others.
Advanced
Joined: Sep 2002
Posts: 95
Likes: 1
From: Leominster MA
Casting Numbers on block:
10168588 = 265 ci, 1994-1996, 2 bolt, L99, Gen II, 4.3L, B-Body, Reverse Flow Cooling
10125327 = 350 ci, 1992-1996, 2 bolt (B & F Body) & 4 bolt (Y Body), LT1, Gen II, 5.7L, Reverse Flow Cooling
10125327 = 350 ci, 1996, 4 bolt, LT4, Gen II, 5.7L, Reverse Flow Cooling
The block code, which is stamped on top of the passenger side of the block at the rear, is just behind the intake manifold.
Take Care!
10168588 = 265 ci, 1994-1996, 2 bolt, L99, Gen II, 4.3L, B-Body, Reverse Flow Cooling
10125327 = 350 ci, 1992-1996, 2 bolt (B & F Body) & 4 bolt (Y Body), LT1, Gen II, 5.7L, Reverse Flow Cooling
10125327 = 350 ci, 1996, 4 bolt, LT4, Gen II, 5.7L, Reverse Flow Cooling
The block code, which is stamped on top of the passenger side of the block at the rear, is just behind the intake manifold.
Take Care!
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Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
Mojo that's a great link. Thanks.
The motors are the 5.7L block, iron heads. I"m discussing whether or not it's worth swapping my cam into the motor or just dropping it in stock and working mine completely.
280 hp sounds sooo low...
The motors are the 5.7L block, iron heads. I"m discussing whether or not it's worth swapping my cam into the motor or just dropping it in stock and working mine completely.
280 hp sounds sooo low...
