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couple questions about a FAST

This is a discussion on couple questions about a FAST within the Internal Engine forums, part of the LSx Technical Help Section category; Originally Posted by shady milkman bad..vacuum leak still ...my pcm is out getting tuned so once i fire it up ...

  1. #21
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by shady milkman View Post
    bad..vacuum leak still ...my pcm is out getting tuned so once i fire it up i will see if its still running a leak..i had the intake off right before i sent my pcm out...still dont quite know whats causing it but besides that its running fine
    How are your injestor o-rings? thats what caused mine.

  2. #22
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by Dr.Crash View Post
    How are your injestor o-rings? thats what caused mine.
    @ injestors i think 1 might be bad..when i get my pcm back..i am going to run it and see if its still reporting lean on both banks and then change the seals..shit its only like 8 bucks

  3. #23
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    Quote Originally Posted by shady milkman View Post
    @ injestors i think 1 might be bad..when i get my pcm back..i am going to run it and see if its still reporting lean on both banks and then change the seals..shit its only like 8 bucks
    ya hooked on phonics works for me!!!!!

  4. #24
    i f*****g hate rice adam0321's Avatar
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    fast 92 and ptm 92 hear. no problems just replace the maf also

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    Quote Originally Posted by adam0321 View Post
    fast 92 and ptm 92 hear. no problems just replace the maf also
    Why replace the MAF also? Still have the stocker here.... though, not really using it at the moment

  6. #26
    i f*****g hate rice adam0321's Avatar
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    i noticed a big difference when i replaced mine, plus we were having problems tuning it with the stock. didit go huge just replaced with one out of a zo6. hey i have a ??? about your 408. what made you go witht hat size? i got the lq9 now i need to decide on the rest

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    Hi, I have a Fast Lsx 78 mm Manifold, to convert it to 92 mm did I only need to change the upper shell???

  8. #28
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by adam0321 View Post
    i noticed a big difference when i replaced mine, plus we were having problems tuning it with the stock. didit go huge just replaced with one out of a zo6. hey i have a ??? about your 408. what made you go witht hat size? i got the lq9 now i need to decide on the rest
    408 is a very common displacement..its about all you can go relatively cheaply and safely...some go 402 so that they have enough for a refresh or a hone if things go bad

  9. #29
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by shady milkman View Post
    408 is a very common displacement..its about all you can go relatively cheaply and safely...some go 402 so that they have enough for a refresh or a hone if things go bad
    Even if you go with a 408 there is still a little room for a clean up later. not much but enough. But there isnt really much of a diff between the 402 and 408. I went with the 408 so i could get the pistons i wanted and keep the CR i wanted. Its really just up to you

  10. #30
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    Can somebody answer my question.
    I have a Fast Lsx 78mm Intake Manifold to convert it to 92mm did I only need to change the upper shell???

  11. #31
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by cesarls1 View Post
    Can somebody answer my question.
    I have a Fast Lsx 78mm Intake Manifold to convert it to 92mm did I only need to change the upper shell???
    i dont think so.

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