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

Trying to guess HP

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Old Sep 11, 2022 | 04:18 PM
  #21  
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SS RRR, exactly, what you are saying sounds dead on.
Usually around 300rw for a full bolt on m6. With the occasional freak that pushes 320rw
autos usually around 280-285rw with the extra drivetrain lose
that was good power for the 1990s
then when you really wanted to feel the sotp difference it was time for the cam/heads and or stroker motor
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Old Sep 15, 2022 | 09:36 PM
  #22  
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Originally Posted by Fast355
Maybe it was a Monday or a Friday car. It still had factory cat, a factory muffler and a standard crank pulley. Your LT1 is a bit of a freak. Then again I think the 92-93 speed density LT1s are some of the strongest runners for a stock LT1.
Factory cat and muffler, you're doing pretty good then. And I have heard the same about the speed density LT1 cars, which wouldn't surprise me, as GM probably wanted to show as big a difference as possible between the outgoing TPI and incoming LT1.

Originally Posted by SS RRR
I dunno... like a groupie I used to hang out at a shop in TX that had a dynojet. They were very meticulous about keeping it calibrated, and this being the mid/late 90's, all the LT1 f-body bros would go there to get their bolt on cars dynoed especially on Fridays and then hit the track. The average I would see out of M6 cars still carrying their cat(s) was around 280rwhp and 310 torque. The torque numbers were always pretty much the same. This was going through at least 10 or more dyno sheets. After exhaust/no cats/shorty headers (LT's were not available yet) they would be around 310rwhp. Can't remember what torque was, but they were all in the very low 13 or high 12 range at ~107mph. Usually with back seats removed. I think bolt-on autos were all around the 260rwhp mark, IIRC. I may not. I don't know since I didn't care about auto cars back then.
These numbers are way more on par with how my car runs. Maybe I just saw a bunch of auto dynos and didn't realize it?
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