bigger injectors for 3100

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  • drayrunner
    • Feb 2007
    • 61

    #1

    bigger injectors for 3100

    I have a 02 3100 malibu with a rsm kit and 28 lb injectors that are maxed out, i would like to go a little bigger like about 30, i really don;t which ones will work with my fuel rail, i;m pretty sure some of the ford injectors will work but don;t know which ones, did the search couldn;t find anything, seems like other guys with the 8 lb rsm kit are using the 28 lb injectors, i;ve only got headers and a 2 one half inch exhaust, got a new fuel filter and the fuel pressure is good 48 with vacuum and 54 without. any ideas.
  • Superdave
    Been there, Built that.
    • Sep 2004
    • 5850

    #2
    injectors from a L67 fit and work well. You may have to change the connectors on the harness though. They are 36lb/hr @ 55PSI. That'll give you room to grow.
    Past Builds;
    1991 Z24, 3500/5 Spd. 275WHP/259WTQ 13.07@108 MPH
    1989 Camaro RS, ITB-3500/700R4. 263WHP/263WTQ 13.52@99.2 MPH
    Current Project;
    1972 Nova 12.73@105.7 MPH

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    • polishdog
      • Aug 2009
      • 6

      #3
      ive also got an '02 malibu. im not finding an rsm kit for a 3.1. did you use the 3.4 model?

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      • robertisaar
        W-Body for Life!
        • May 2007
        • 6414

        #4
        Originally posted by polishdog View Post
        ive also got an '02 malibu. im not finding an rsm kit for a 3.1. did you use the 3.4 model?
        for the most part 3100=3400. about the only differences are internal(bigger bore)
        1995 Monte Carlo LS 3100, 4T60E...for now, future plans include driving it until the wheels fall off!
        Latest nAst1 files here!
        Need a wiring diagram for any GM car or truck from 82-06(and 07-08 cars)? PM me!

        Comment

        • no_doz
          • Sep 2005
          • 912

          #5
          well depending on the year that is...

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          • robertisaar
            W-Body for Life!
            • May 2007
            • 6414

            #6
            Originally posted by no_doz View Post
            well depending on the year that is...
            the reason for the modifier "for the most part"...

            in this situation, 3100=3400=3x00...
            1995 Monte Carlo LS 3100, 4T60E...for now, future plans include driving it until the wheels fall off!
            Latest nAst1 files here!
            Need a wiring diagram for any GM car or truck from 82-06(and 07-08 cars)? PM me!

            Comment

            • asylummotorsports
              Banned
              • Oct 2005
              • 649

              #7
              Is that the RSM shaft driven thing?

              I thought they were out of business and took that POS with them.

              Comment

              • robertisaar
                W-Body for Life!
                • May 2007
                • 6414

                #8
                Originally posted by asylummotorsports View Post
                Is that the RSM shaft driven thing?

                I thought they were out of business and took that POS with them.
                it sounds like it...

                i'm waiting for a post saying "the pulley broke off/the shaft broke in half/etc..."
                1995 Monte Carlo LS 3100, 4T60E...for now, future plans include driving it until the wheels fall off!
                Latest nAst1 files here!
                Need a wiring diagram for any GM car or truck from 82-06(and 07-08 cars)? PM me!

                Comment

                • drayrunner
                  • Feb 2007
                  • 61

                  #9
                  rsm kit

                  I bought a used rsm kit from blackly gp or someone with a name like that off this site, before i could use it , i had to have the pulley end build up with weld and machined plus a new keyway in both the pulley and shaft plus new high speed bearings and seal, and yes the kit was for a 3400 grand am,it fit my malibu with no problem, about the injectors, do you think there to big for the few mods i got. stock motor, except headers and 2 one half exhaust, i would like a set of those high lift rockers, but i guess that will not happen till christmas.

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