LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Low dyno numbers with headers

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Old Apr 3, 2003 | 01:31 AM
  #16  
HM Murdock's Avatar
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Joined: Mar 2003
Posts: 465
From: The Great State of Texas.
Originally posted by KCFormula
Is there anymore information I might be able to give you guys to help me figure out why my car is such a dyno turd?
BTW a buddy of mine went from this dyno to another dyno the following day and this dyno was 2hp off the other one. So I figure its not the dyno that is giving me the low numbers. (for being wrong anyway)
Post a scan of your dyno. You may just make decent power across the board, which would explain low dyno, good track #'s, rather than high peak, low everywhere else.

Personally, I want the low track #. Peak HP don't mean **** when you get drug by someone with less of it.
Old Apr 3, 2003 | 01:50 AM
  #17  
Wild1's Avatar
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Joined: Oct 2002
Posts: 2,277
From: Orange Kounty, Kalifornia
If the temps and humidity are different from your baseline test, you'll get different results on the dyno. But even if that was an extreme difference, I would have expected stronger gains than that.

If you can get a reading on your computer (freescan is for 94-95) not sure about 93s... but it may be possible you're getting knock retard. That's what I had on the dyno and it pulled 10* of timing out of the motor. Wasn't good... would be great if you can get knock readings.
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