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LS6 intake and FAST

This is a discussion on LS6 intake and FAST within the External Engine forums, part of the LSx Technical Help Section category; What is the gouge on the LS6 intake and FAST 90? I am shopping for an LS6 intake(waiting to find ...

  1. #1
    weberje
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    LS6 intake and FAST

    What is the gouge on the LS6 intake and FAST 90?

    I am shopping for an LS6 intake(waiting to find one on here or ebay for reasonable price), but a friend told me to just get a FAST 90mm.

    I haven't decided whether to go FI or head/cam yet, but have Long Tubes now and want to let the engine breath with a better intake.

    Can someone give me the down n' dirty?

  2. #2
    The Bandit Wesman's Avatar
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    1998 Trans Am WS6

    Quote Originally Posted by weberje View Post
    What is the gouge on the LS6 intake and FAST 90?

    I am shopping for an LS6 intake(waiting to find one on here or ebay for reasonable price), but a friend told me to just get a FAST 90mm.

    I haven't decided whether to go FI or head/cam yet, but have Long Tubes now and want to let the engine breath with a better intake.

    Can someone give me the down n' dirty?

    Only go with the FAST 90/90 if you are definitely planning on getting a heads/cam package. The 90/90 is just too much airflow for the stock heads and cam, the motor won't be able to use it all, and you'll probably lose a bunch of low end power.

    The LS6 is a great manifold for stock to full bolt on cars. I believe the LS6 gets maxed out somewhere above 500WHP, so unless you're planning on lots of boost or a very agressive H/C package, it should suit you just fine.

  3. #3
    weberje
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    Excellent- thanks

    I also understand that since I have a 98, I will need to buy some EGR stuff for the LS6?

  4. #4
    Member Nitrous's Avatar
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    97 GMC with 02 LS6 engine

    Pull the EGR off and use HPTuners or EFILive to delete it from the PCM. You'll still pass emissions.

  5. #5
    member since may 2000 nhraformula's Avatar
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    2000 nhra edition formula

    Quote Originally Posted by Nitrous View Post
    Pull the EGR off and use HPTuners or EFILive to delete it from the PCM. You'll still pass emissions.
    yup, thats what i did.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  6. #6
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    1999 Hardtop Z28

    cant beat an ls6 manifold price!

  7. #7
    Member blackbird99's Avatar
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    2000 t/a

    i was thinking about getting a bbk intake,my brother has one on his ta.

  8. #8
    Junior Member
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    white
    99 trans am convertible

    for a 99 ls1. would you go with a stock ls6 intake or an aftermarket like a weiand or slp?

  9. #9
    Member Nitrous's Avatar
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    97 GMC with 02 LS6 engine

    Go with the LS6 or F.A.S.T.

  10. #10
    weberje
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    Is it worth getting a dyno tune ('bout $450) after intake and LT header/y swap? Then, could just have them delete the EGR out then?

  11. #11
    CocheeseWS6 cocheesews6's Avatar
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    Pewter
    2000 Pontiac Formula WS6

    Yes, its worth it, they can delete the codes, when I had mine done, I learned my car was running way to rich, plus its like $50 to have a retune as more mods are added.

  12. #12
    Visualize°Design°Create SSwt00SS's Avatar
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    '12 Silver SS 1SS
    '00 Black SS #8617

    the 'gouge' on the top shell of the intake is for the fuel lines to cross over the top of the intake...

    go FAST, IMO, especially if you are a heads/cam car. the ls6 is a joke once those mods are done...

    go ls6 if you are going to go F/I or spray (avoid blowing off the top shell or parts of it)...

    figure out what your goals are and then get the intake that fits to achieve that goal...

    pic of why the 'gouge' in the FAST is needed:
    2000 SS - The Wicked Witch: °°Cammed 'n Slammed°° 458rwhp/410rwtq
    Quote Originally Posted by Bowtie_girl30
    I was hoping to just hump her up the exhaust cause she is so damn sexy....
    "Never argue with an idiot. They drag you down to their level, then beat you with experience."

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