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

I love it when people try and sell L99's as LT1's! LOL

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Old 06-21-2009 | 09:49 PM
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What we do to keep our cars on the road is often quite different from what we know to be the ideal route.
I would guess a L99 with 3.42s would probably just leave a stop like the V6. Will be fine for transportation.
Old 06-21-2009 | 09:51 PM
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What did the caprices come with gear wise?
Old 06-21-2009 | 10:28 PM
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The L99 was available with a best of 3.23 gears and those were only in the L99 9C1(police) cars. Most standard civilian L99 cars came with 2.93s and 27.5" tires, 1400rpm stall, some guys have even found 2.73s.

You are giving it more gear and less weight.

If I had it to do all over again I think I would have started with gears and stall behind the L99 think those things would have been a HUGE improvement before even doing the LT1.
Old 06-21-2009 | 11:23 PM
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If you want a boat anchor I have a 2.8 MPFI v6 sitting on a pallet in my garage out of a turd gen for ya' . The T5 glass tranny is sitting right next to it too! .
Old 06-21-2009 | 11:35 PM
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Originally Posted by Puck
If you want a boat anchor I have a 2.8 MPFI v6 sitting on a pallet in my garage out of a turd gen for ya' . The T5 glass tranny is sitting right next to it too! .
Dude, my stock short block L99 was way faster than what your sig says....
Old 06-22-2009 | 01:52 AM
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I always thought that the 302 was a cubic inch limit placed on by what ever racing series those cars were running in?
Old 06-22-2009 | 04:52 AM
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It was.
Old 06-22-2009 | 06:07 AM
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The trans am series
Old 06-22-2009 | 09:38 AM
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Originally Posted by GIZMO
Dude, my stock short block L99 was way faster than what your sig says....
Cool - I didn't say anything about L99's though, I was talking about the 2.8 MPFI v6's that came in the 3rd gen f-bodies to give a real example of a "boat anchor". Maayybe 140 to the wheels .
Originally Posted by Puck
If you want a boat anchor I have a 2.8 MPFI v6 sitting on a pallet in my garage out of a turd gen for ya' . The T5 glass tranny is sitting right next to it too! .
Old 06-22-2009 | 10:23 PM
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Ok picked up my power house L99. Silly question should i put this stock lt1 cam i got in it? I also got the valve springs.
Old 06-23-2009 | 11:31 AM
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What about the 4.3 V6? Plenty of howse power.
Old 06-23-2009 | 12:36 PM
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same as the v8 version. Unfortunately after getting my battery charged and tested. I finished checking the compression on the motor i just bought. blown head gasket between 5 and 7 and of course this place isnt local. Full of f*cking excuses too.....................
ARGHHHHHHH
Old 06-23-2009 | 12:58 PM
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So what cars come with the l99 4.3 v8? just Caprice's/impala's?
Old 06-23-2009 | 06:59 PM
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Just the Caprice sedan. The wagons, the Impalas, the Roadmasters, and Fleetwood all got the LT1 standard.
Old 06-23-2009 | 07:33 PM
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Originally Posted by 96capricemgr
Been done, no point too it since the stock 3.48 crank will take more rpms than the pcm will allow.

If you use the L99 crank and rods then you can use a stock LT1 piston and the deck height comes out stock, but you can't trust the rods at high enough rpms to take advantage.

I think the old 302/327 stuff was done because they lacked the metalugy to make repiable parts in longer strokes at high rpms. That is no longer the case.
Well said.

Originally Posted by xx_ED_xx
Ok picked up my power house L99. Silly question should i put this stock lt1 cam i got in it? I also got the valve springs.
I'd go bigger...
Old 06-23-2009 | 07:57 PM
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Originally Posted by Puck
Cool - I didn't say anything about L99's though, I was talking about the 2.8 MPFI v6's that came in the 3rd gen f-bodies to give a real example of a "boat anchor". Maayybe 140 to the wheels .


I would say that's on the high side, however even though they were powerless they were solid through and through. I had an '95 Camaro and put 200,000 miles on it and it never missed a beat. I only ever had to replace belts, water pump and A/C condensor. Changed the oil religiously and it never leaked or burnt anything noticeable.
Old 06-25-2009 | 06:08 PM
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Well got a replacement for the original motor that had a blown head gasket
Old 08-10-2009 | 12:13 AM
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Originally Posted by 96capricemgr
Just the Caprice sedan. The wagons, the Impalas, the Roadmasters, and Fleetwood all got the LT1 standard.
Did the L99 and LT1 use the same intake manifold?
Old 08-10-2009 | 06:14 AM
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Originally Posted by Rich2279
Did the L99 and LT1 use the same intake manifold?
Yes they did.
Old 08-10-2009 | 06:54 AM
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Originally Posted by xx_ED_xx
True But this is a very broke *** budget build till after I get into the army
HA! till you get in the army says the airborne guy


Quick Reply: I love it when people try and sell L99's as LT1's! LOL



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