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Thread: what size injectors?

  1. #1
    Senior SCH Member
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    what size injectors?

    I am currently running 30lbers with my mods in my signature, this winter I will be adding afr165's, with a 75mm tb, systemmax intake and 1.7 rockers, can I still use the injectors, maybe with an fmu, if so, what ratio?
    90gt 5speed, chp stroker 331 with forged internals including crank, afr 165's, custom grind cam, trickflow street heat intake, 1.7 rockers, 80mm pro M with morpheus power pipe and bosch bypass valve, full off road exhaust, revised novi 1K with 8"asp pulley, 255 in tank, 30lbers, accufab afr, msd6al with coil, 355's on stock suspension and street tires.

    Dynojet#'s= 505rwhp, 469rwtq@7psi boost.


    91 coupe 5speed:
    fully ported stock heads, cobra upper and lower intake, 65mm TB, 75mm mass air, full exhaust, compucar adjustable kit, 155lph pump, king cobra clutch, msd coil and stock 308's and street tires.

    13.9@102mph

  2. #2
    SCH Moderator Hustler's Avatar
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    I was using a 4:1 with 42lb injectors, I would say 30/36lber's would work with a 6:1 ratio fmu. Obviously if you can get rid of the fmu altogether it would be better. You could sell your fmu on ebay and your injectors, and maybe find some 42/50's and have the car tuned.

  3. #3
    Senior SCH Member
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    what were your mods?
    90gt 5speed, chp stroker 331 with forged internals including crank, afr 165's, custom grind cam, trickflow street heat intake, 1.7 rockers, 80mm pro M with morpheus power pipe and bosch bypass valve, full off road exhaust, revised novi 1K with 8"asp pulley, 255 in tank, 30lbers, accufab afr, msd6al with coil, 355's on stock suspension and street tires.

    Dynojet#'s= 505rwhp, 469rwtq@7psi boost.


    91 coupe 5speed:
    fully ported stock heads, cobra upper and lower intake, 65mm TB, 75mm mass air, full exhaust, compucar adjustable kit, 155lph pump, king cobra clutch, msd coil and stock 308's and street tires.

    13.9@102mph

  4. #4
    Senior SCH Member lx-convertible's Avatar
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    42lbers with a tune, you will love it.
    Neil
    Engine: DSS Pro Bullet 306, Windsor Jr. heads, E303, 42lb inj., Cobra intake(fully ported lower)65mm TB, 80mm Mass Air, MSD 6BTM, MSD coil

    Power Adder: Novi 1K, Anderson PowerPipe, ASP 8 IN Crank. No PS, AC, SMOG.

    HP: 488.3
    TQ: 461.7 Tuned by FordChip.com

    11.77 @ 119.9
    Best 60ft-1.56
    New project 1991 coupe
    NEW TOY 1995 H/D Sportster

  5. #5
    Senior SCH Member fanglemeister's Avatar
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    Hey Neil,

    Is there any chance of finding out what changes FordChip made to your eec programming? Just curious. Also, are you running alloy Juniors or the iron?

    thanks.
    Chris

  6. #6
    blown5oh
    Guest
    I ran out of injector on my recent dyno tune, running w/ the 6:1 FMU...it ran lean almost from idle w/ the 3" pulley.

    I'm gonna get the 42# squirters and leap over the 400rwhp hurdle.

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