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F.A.S.T. 90/90 Combo

This is a discussion on F.A.S.T. 90/90 Combo within the External Engine forums, part of the LSx Technical Help Section category; current mods and numbers in sig. what would the gains be if i go to a FAST 90/90 setup. i'm ...

  1. #1
    Visualize°Design°Create SSwt00SS's Avatar
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    F.A.S.T. 90/90 Combo

    current mods and numbers in sig. what would the gains be if i go to a FAST 90/90 setup. i'm mainly looking for more TQ. yes a swap to a bigger cam (Torquer v2) is in the near future as well. thanks.
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    Slow'er'Ass Mr. Luos's Avatar
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    10-15 for both HP and TQ would be my guess.

    The LS6 intake does really well for most H/C cars. It is when you go beyond that it can start to be a little restriction.



    Also...if you do it, get the FAST 90mm intake and a NW 90mm TB.

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    perhaps i should go with the cam first and see where i sit power wise. that route is cheaper than the 90/90 setup...

    set 90/90 includes a NW t/b...

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    Slow'er'Ass Mr. Luos's Avatar
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    Okay good.
    I got the FAST 90mm TB and read after the fact that people had issues with them. So far so good with 3500-4000 miles on it.




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    can i reuse the factory fuel rails/setup on the FAST 90...

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    Slow'er'Ass Mr. Luos's Avatar
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    You can.

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    plug and play huh? sweet!

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    Pretty much like any intake install for the most part.

    I made a mistake installing my valley cover though. I knew I had to use the new bolts FAST sends but I didn't anyways....must have been one of the beer drinking working on car afternoons.
    Got lucky I didn't crack the intake.

    You will need to make sure you get the port gaskets though. Mine didn't come with them. TB gasket as well.

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    port gaskets for the heads i assume?

    yes i have read about the valley cover plate issues...crappy

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by SSwt00SS View Post
    port gaskets for the heads i assume?


    I was told I could re-use the ones on the LS6 intake...but I went ahead and got new ones. One of those things with an all new build I guess.

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    Quote Originally Posted by Mr. Luos View Post


    I was told I could re-use the ones on the LS6 intake...but I went ahead and got new ones. One of those things with an all new build I guess.
    what gaskets do you recommend?

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    I went with the ones FAST sells.

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    you mean that aren't included with the intake and t/b?

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    Slow'er'Ass Mr. Luos's Avatar
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    I know....

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    yo, SLOWASS, hehehe...

    i just purchased a ported FAST 90/90 combo (with 0 miles) and will be picking it up this Saturday. it will come with valley bolts, intake gaskets, and the trimmings. picked it up for $1100...

    anything you feel to share with me about install, etc., let me know!

    here is a pic of it on the car it was supposed to go on...


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    If you have done an intake install before...pretty much the same thing.

    Vasoline for the injector o-rings.
    Make sure to use the valley cover bolts supplied.

    Otherwise...straight forward.
    Enjoy!!!

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    Quote Originally Posted by Mr. Luos View Post
    If you have done an intake install before...pretty much the same thing.

    Vasoline for the injector o-rings.
    Make sure to use the valley cover bolts supplied.

    Otherwise...straight forward.
    Enjoy!!!
    Vasoline for the injector O-ring, why is that? I did not do that in regards to my Ls6 intake when i installed it...

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    Torquer v2 hell yea!

    Hey mr louis what problems have 90/90's had ????
    Stuff break on em?

    Quote Originally Posted by SSwt00SS View Post
    current mods and numbers in sig. what would the gains be if i go to a FAST 90/90 setup. i'm mainly looking for more TQ. yes a swap to a bigger cam (Torquer v2) is in the near future as well. thanks.

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    when you say 15 more hp is that over a ls6 with a port and polished stock tb or is that 15 hp on top of that cause im in the same situation except im deciding between keeping the ls6 and porting tb and buying heads or buying the fast 90/90

    what would be better fast 90/90 or heads?????

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    Quote Originally Posted by SSwt00SS View Post
    Vasoline for the injector O-ring, why is that? I did not do that in regards to my Ls6 intake when i installed it...
    Make sure not to bind up a ring. Just a precaution.


    No issues that I know of...with the intake.
    I have read of people having issues with FAST's throttle body. Mine works great though.
    If I could do it again...I would get the Nick Williams.

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