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F.A.S.T. Fuel Rails for LSX Mounting DON'T FIT

This is a discussion on F.A.S.T. Fuel Rails for LSX Mounting DON'T FIT within the External Engine forums, part of the LSx Technical Help Section category; Hey has anyone else ran into this problem............The little billet brackets included with their fuel rail kit with fittings is ...

  1. #1
    Nitrous Tuner LS2Tuner's Avatar
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    F.A.S.T. Fuel Rails for LSX Mounting DON'T FIT

    Hey has anyone else ran into this problem............The little billet brackets included with their fuel rail kit with fittings is at least 3/8" off!!!!!!!! I guess I'll call them tomarrow and see what they have to say. Please if anyone else has had this problem ANY input would be Greatly appreciated.
    Thanks.

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    2002 Trans Am WS6

    Mine fit perfectly. Can you upload a pic?

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    Nitrous Tuner LS2Tuner's Avatar
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    F.A.S.T. rails are designed for "old" style inj.

    I'll upload some pics later this week but the problem is the rail is designed for LS1 which uses "old" tall style injectors.The old "Bosch" style is 3" tall where as the new nippondenso inj. that is used on the LS2 is only 2 3/8".
    Needless to say I had to machine down the billet mounting pedestals to where the "feet" were flush with bracket. I think it took about .420 on the Bridgeport.
    Now it puts you in a another bind because when you bolt the bracket to the rail it doesn't line up with the bosses in the intake. You need to purchase 3/8" to 1/2" longer 10/24 bolts and washers to space the brackets away from the rails to line up with intake holes.I had to put 2 #10 AN style washers between each bracket and rail.
    The problems aren't finished there though..........Now the rails are right against the bosses for the intake mounting bolts. So I guess I'll take a little sanding pad from 3M and 45 the edges to clear the rails.
    It would of been nice to be informed or a footnote from F.A.S.T. included about mods necessary for LS2 installs.
    And your reply of yours fitting fine you MUST have a LS1!!!!!!!!!!

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    2002 Trans Am WS6

    Yes, I have an LS1. Sorry, didn't realize you had an LS2.

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    Nitrous Tuner LS2Tuner's Avatar
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    Just noticed Nap town

    Yeah I didn't notice you are in "Nap"...... Unfortunatly I'm from Ft.Wayne.... DON'T MISS AT ALL!!!! I've heard you guys have been getting a shit load of rain. Ever run at Muncie Raceway or Bunkerhill????

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    2002 Trans Am WS6

    Yeah, we're supposed to get dumped on tonight. I've been up to Muncie one, and driven by Bunkerhill plenty of times. I usually race over at ORP (used to be IRP), since it's closer. That's where I'll be Tuesday!!

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    Nitrous Tuner LS2Tuner's Avatar
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    PICS of mods needed for LS2 Inj.

    Here is a few pics of what I had to do to get the F.A.S.T. rails to fit.
    I know they arent the best but thought they could help some people.
    Basically the mounting "post" or tab has to be ground all the way off for them to fit.
    Last edited by LS2Tuner; 11-22-2006 at 07:01 PM.

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