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FAST 102 aftermarket Ls1 fuel rail?

This is a discussion on FAST 102 aftermarket Ls1 fuel rail? within the External Engine forums, part of the LSx Technical Help Section category; ...

  1. #1
    Join Date
    Jun 2008

    1998 trans am

    FAST 102 aftermarket Ls1 fuel rail?

    Iím looking at replacing my intake on a heads / cam car Ls1. If I put a FAST 102 on the car I know I will need a different fuel rail if stock.
    But the car already has an aftermarket billet style fuel rail not sure of the brand. Is it the crossover on the stock rail that gets in the way with the 102? Or can I use this billet fuel rail with stock Ls1 style injectors? thanks.

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Ugy Lower Corner of AL

    Navy Blue Metallic
    98 T/A w/ mods, 97 FBVert

    Yes the LS1 style crossover tube doesn't clear. LS2 will. You will also need spacers to use the LS1 style injectors.

    Two more things on the wire harness for the injectors. On Num 7 & 8 cyl you may have to loosen up the loom in order for the harness to connect to the injectors.

    And do you know you need to clearance the water pump if you are not using a LS2 water pump?

    It's not much so be careful I had my pump off and used a grinder VERY LIGHT PASSES. Took about 4-5 tries till I got clearance for the NW102 throttle body to clear.

    Hardest part was that bolt tab. It's not there for LS2 style pumps. If you get a LS2 water pump you need to transfer the something off the LSq1 style but I can't remember what exactly at this time.

  3. #3
    Junior Member 99ss405's Avatar
    Join Date
    Feb 2015
    Florence , SC
    or you can do like me an redneck the ls1 rail to fit ... cut it ! I also use high temp engine paint to paint the fast intakes black !

    Last edited by 99ss405; 02-18-2015 at 10:05 PM.

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