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fast 90/90

This is a discussion on fast 90/90 within the External Engine forums, part of the LSx Technical Help Section category; is the fast 90mm intake still available new. the only one i can find is the 102mm and that seems ...

  1. #1
    Member 02fbody35th's Avatar
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    2002 camaro 35th anv.

    fast 90/90

    is the fast 90mm intake still available new. the only one i can find is the 102mm and that seems to big for my application. i seen a few used adds but im not interested in those either unless i dont have a choice. thanks

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    None Shall Pass Knight's Avatar
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    It is not available new any longer. Your best bet is going to be to buy a used one, or get the 102.

    And you can never be too big.

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    Member 02fbody35th's Avatar
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    thats what i thought, does the 102 basicly supercede the 90 and the 92. you said you can never go too big, cant you loose bottom end torque if you go to big?

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    None Shall Pass Knight's Avatar
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    You will only take in as much air as the engine can use. Too small of an intake/throttlebody can impede performance. Your engine may not use the intake and tb to it's full capability, but it won't hurt anything. Which is also why they discontinued the smaller size.

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    Member 02fbody35th's Avatar
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    2002 camaro 35th anv.

    that makes sense, so im doing a h/c/i swap. the heads are prc stage 5.3 heads with 224 cam. and i guess the fast 102 intake. so my question is what throttle body would be best for this set up the 90, 92, or 102mm tb

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    Don't buy a fast 90 tb. They have a sticking problem right out of the box. Find you a Nick Williams or a PTM from Texas Speed.
    TSP 347 SB, TSP Stage 2.5 PRC LS6, TSP MS4, Performabuilt Stage 2 4L60E, Yank PT4000, 4.11s, Fast 90/90, FTRA Cold air intake+all the free mods, Dynatech Supermaxx Exaust System, DMH Cutouts, Hooker Catback/FTRA Tips. Tuned by RPM/Garner NC. 11.28@119

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    Member 02fbody35th's Avatar
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    2002 camaro 35th anv.

    Quote Originally Posted by PFM View Post
    Don't buy a fast 90 tb. They have a sticking problem right out of the box. Find you a Nick Williams or a PTM from Texas Speed.
    ok thanks, so are you recomending a 90mm tb for my setup?

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    Member BrntWS6's Avatar
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    2002 WS6 M6 - 461hp 406tq

    don't forget with the 102 you will need new fuel rails, skinney injectors, new water pump or grind your stock one down, and get rid of the MAF for an SD tune.

    I'd personally get a used 90 / 92 (there around) and sacrifice the 5hp.

    You'll sacrifice a little down low with the 102 (5 - 7hp) but will gain it back after I think 3-4k rpms.

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    do you HAVE to get a ne TB if you get a FAST?

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