LT1-LT4 Modifications 1993-97 Gen II Small Block V8

1995 caprice lt1 work in a 1996 fbody?

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Old Nov 8, 2006 | 02:36 PM
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Default 1995 caprice lt1 work in a 1996 fbody?

working on a project z/28, what would i have to do just swap heads?
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Old Nov 8, 2006 | 02:37 PM
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and i believe waterpump for fan clearance, but that is all.
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Old Nov 8, 2006 | 04:33 PM
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just have to swap belt accessories and waterpump
otherwise caprice LT1 is same save for cast iron heads.
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Old Nov 9, 2006 | 01:57 AM
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thanks!
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Old Nov 9, 2006 | 06:38 AM
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Originally Posted by ty97z
working on a project z/28, what would i have to do just swap heads?
Is it the baby LT1 or the Police package caprice??
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Old Nov 9, 2006 | 11:19 AM
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the 9c1 caprice could come with eithe the L99 or the LT1.
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Old Nov 9, 2006 | 02:14 PM
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lt1 is what they said i haven't looked at it yet.
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Old Nov 9, 2006 | 02:36 PM
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L99 is the 4.3 right? Is that the "Baby LT1"? Anyone have pics readily linkable, I was curious about that when I read it befor.
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Old Nov 9, 2006 | 06:25 PM
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yes the 4.3L is the L99 aka The "baby" LT1. They look identical to an LT1. Have to check the block casting to tell difference or remove head and do some measuring of the bore.
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Old Nov 10, 2006 | 05:54 AM
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The baby LT1 was a 265ci wasnt it?
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Old Nov 10, 2006 | 07:31 AM
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Oh so it IS a V8? I thought it was the 4.3 V6! I was kinda getting excited, that would've been cool
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Old Nov 10, 2006 | 08:11 AM
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http://www.akmcables.com/l99.htm

There's a 4.3 L99 motor going in to my 94Z. Bolted right in. It put down 203 rwhp on the dyno (at 10:1 afr, yeah, needed tuning).

It's now sitting on an engine stand. I'd sell it if anyone wanted it. Cheap.
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Old Nov 10, 2006 | 09:11 AM
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So it's a corvette block with normal cast iron heads and so forth, just less bore? Or is the crank stroked different? If so, making a LT1 destroker for higher RPM would be cool!
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Old Nov 10, 2006 | 09:51 AM
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It's a small stroke small bore motor. Yes, you could use the crank to make a destroked 'normal' LT1.

3.750" bore x 3.00" stroke 5.94" rod
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Old Nov 10, 2006 | 10:56 AM
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That'd make one hell of a reving motor at bigger bore!
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Old Nov 10, 2006 | 07:44 PM
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Originally Posted by Formula350
That'd make one hell of a reving motor at bigger bore!

not with the stock PCM it wont..
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Old Nov 11, 2006 | 01:23 AM
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lol Well true, you'd have to change it up to have the rev limiter raised. Low stroke = revs though. That's why Ferrai, Lambo, etc, use 10 and 12cyl 5.x L motors instead of making power the old fashion way like we do

I kinda want a baby-LT1 now just for the block and lower end!
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Old Nov 11, 2006 | 12:51 PM
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Originally Posted by Formula350
lol Well true, you'd have to change it up to have the rev limiter raised. Low stroke = revs though. That's why Ferrai, Lambo, etc, use 10 and 12cyl 5.x L motors instead of making power the old fashion way like we do

I kinda want a baby-LT1 now just for the block and lower end!

actually no. You're going to have to go to aftermarket fuel management, unless you consider 7200rpm a high-revving motor....
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Old Nov 11, 2006 | 05:01 PM
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Originally Posted by buffman
actually no. You're going to have to go to aftermarket fuel management, unless you consider 7200rpm a high-revving motor....
Well I can chip mine over 9K RPMs, but it's a 93 so, probably the difference Sucks for you MAFs! lol For a stock motor, yes 7200 is high-reving.
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Old Nov 11, 2006 | 08:53 PM
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Originally Posted by Formula350
So it's a corvette block with normal cast iron heads and so forth, just less bore? Or is the crank stroked different? If so, making a LT1 destroker for higher RPM would be cool!
The Vette's are the only ones with 4-bolt Mains. The 4.3 is no where near a Vette motor, doesn't have the bore. The L99 could be built to be powerful, we have built de-stroked 327's that went to 8000+RPM's
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