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LT's and ORY installed = 0 gain in hp?

This is a discussion on LT's and ORY installed = 0 gain in hp? within the External Engine forums, part of the LSx Technical Help Section category; Originally Posted by GottaHaveLS1 Alright i guess i'll try that. One question: will my fuel pressure be messed up if ...

  1. #21
    !!!!!!!!!!!!!!!!!!!!!!!!! ATCharming's Avatar
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    Quote Originally Posted by GottaHaveLS1 View Post
    Alright i guess i'll try that. One question: will my fuel pressure be messed up if the fuel pump is bad. I'll be testing it tomorrow.
    ummm.... depends... if ur gas tank is full, im guessin it wouldnt be messed up, but if ur runnin low, ur gonna be suckin fumes so it probly will be messed up

    dont quote me on that part tho...

  2. #22
    Senior Member Wheeler99WS6's Avatar
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    Are you sure the tuner didnt mess with the fuel delivery? You did say he had messed with the AF ratio. Ask him which fuel trims he was adjusting.

  3. #23
    Rice Hungry GottaHaveLS1's Avatar
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    I don't know what he did with the fuel trims but before I left he put the best tune on it that he could. I changed my fuel filter and the inside of the original filter was really dirty.

  4. #24
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
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    Are you still running your stock MAF?

  5. #25
    Rice Hungry GottaHaveLS1's Avatar
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    Quote Originally Posted by Wheeler99WS6 View Post
    Are you still running your stock MAF?
    Yea, I've heard I won't need a new one until i have 500 hp or so.

  6. #26
    Member mnypitZ's Avatar
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    I would think your SOTP Dyno might be broke. When I got my car back from getting the headers, ORY and heads done I didnt think it felt much faster, til I ran it against a lightly modded Mudstang GT and just stompted him into the pavement. I had run Mudstangs previously and beat them, but not that bad. Then yesterday I picked it up after the cam install and mild tune and again, didnt feel a big differance, til I got beside a bolt-ons Formula and tore him up.

    Without real numbers you can never tell. Without a before and after it is definately just a guess as to whether it has more HP or not.

    I have seen these cars run over 550rwhp with stock fuel pumps and if yours was bad I doubt it would run decent. It sounds like it still has a lot of power, so if you dont feel like it lost power I would guess your fuel pump is fine.

    Get a dyno and see. Its not that expensive and will give you peice of mind. And if your not up in HP then start looking for problems.
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