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

Dyno #s a little low and LEAN!!

Old Oct 30, 2005 | 01:00 PM
  #1  
jsetzer's Avatar
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From: Moore OK
Dyno #s a little low and LEAN!!

First pull
Second pull
Stock pump, pcm4less tunes, do I need more injectors? More pump? Brian is working on the tuning for me.
Old Oct 30, 2005 | 05:04 PM
  #2  
Cmr0z28's Avatar
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From: Palm City, Florida
Re: Dyno #s a little low and LEAN!!

I'd change the pump anyways....cheap and easy (Walbro 255lph). I don't think you'll be maxing out the stock injectors with that much power....I think that starts happening in the ~365rwhp range.

Once you get the A/F where it should be, your numbers will be where they should...they don't look too bad though. Dyno it again with the new tune and go from there
Old Oct 30, 2005 | 05:09 PM
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Re: Dyno #s a little low and LEAN!!

I wold bump up the the injectors to at least 30's. hell I was maxing my stocker injectors when I added my long tubes+boltons.
Old Oct 30, 2005 | 07:11 PM
  #4  
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Re: Dyno #s a little low and LEAN!!

Datamaster was showing as high as 98%, I know its not an accurate way to judge,,,, but.

Everyone seems to agree the pump won't hurt anyways. And if I get to the numbers I want I will be real close to maxing the injectors. I have a set of heads locally that I may buy that would put me very close to the 400 range.... so maybe a pump and 32s are worth the time/money.
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