different fuel injectors on a stock e30?

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  • chuckybob
    E30 Modder
    • Aug 2004
    • 952

    #1

    different fuel injectors on a stock e30?

    what're the effects of using non-stock fuel injectors with a higher pound/hour output on an otherwise stock car? are fuel injectors transferable through all e30s? are there any negatives other then running rich and worse gas mileage?
    : : 1984 318i : : PNW E30 Crew : : Sold!!
    Now becoming the R3vlimited Pro3 car
    http://www.r3vlimited.com/board/showthread.php?t=93780
  • Jordan
    R3V OG
    • Oct 2003
    • 12911

    #2
    Re: different fuel injectors on a stock e30?

    Originally posted by chuckybob
    what're the effects of using non-stock fuel injectors on an otherwise stock car?
    More fuel wasted. Otherwise not much.

    Originally posted by chuckybob
    are fuel injectors transferable through all e30s?
    No.
    Originally posted by chuckybob
    are there any negatives other then running rich and worse gas mileage?
    Pointless on a stock motor.
    Tenured Automotive Service Professional - Avid BMW Enthusiast

    Vapor Honing & E30 ABS Pump Refurbishment Service
    https://mtechniqueabs.com/

    Comment

    • MR 325
      Moderator
      • Oct 2003
      • 37828

      #3
      Ya, they're just going to rape your gas milage
      BimmerHeads
      Classic BMW Specialists
      Grover Beach, CA

      www.BimmerHeads.com

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      • erik325i
        No R3VLimiter
        • Jan 2005
        • 3567

        #4
        Would it help if you got bigger injectors along with an m30 afm? or would you still not recomend it?
        How would it be with just the m30 afm and stock injectors?

        Comment

        • Jordan
          R3V OG
          • Oct 2003
          • 12911

          #5
          Originally posted by erik325i
          Would it help if you got bigger injectors along with an m30 afm? or would you still not recomend it?
          How would it be with just the m30 afm and stock injectors?
          Pointless.
          Tenured Automotive Service Professional - Avid BMW Enthusiast

          Vapor Honing & E30 ABS Pump Refurbishment Service
          https://mtechniqueabs.com/

          Comment

          • MR 325
            Moderator
            • Oct 2003
            • 37828

            #6
            Injectors and a M30 AFM will give you a slight improvment in power
            BimmerHeads
            Classic BMW Specialists
            Grover Beach, CA

            www.BimmerHeads.com

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            • T.Dot E30
              E30 Addict
              • Mar 2004
              • 536

              #7
              What about with a chip also?

              Comment

              • MR 325
                Moderator
                • Oct 2003
                • 37828

                #8
                Even better of course
                BimmerHeads
                Classic BMW Specialists
                Grover Beach, CA

                www.BimmerHeads.com

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                • nando
                  Moderator
                  • Nov 2003
                  • 34839

                  #9
                  FWIW I get slightly better gas mileage with my 19# injectors on a stock motor (except for an SS exhaust and chip).
                  Build thread

                  Bimmerlabs

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                  • erik325i
                    No R3VLimiter
                    • Jan 2005
                    • 3567

                    #10
                    Re: different fuel injectors on a stock e30?

                    Originally posted by Jordan
                    Pointless on a stock motor.
                    to what degree of modding would you say should be done before getting larger injectors?

                    Comment

                    • T.Dot E30
                      E30 Addict
                      • Mar 2004
                      • 536

                      #11
                      Re: different fuel injectors on a stock e30?

                      Originally posted by erik325i
                      Originally posted by Jordan
                      Pointless on a stock motor.
                      to what degree of modding would you should be done before getting larger injectors?
                      The technical answer would be, to the degree that your current injectors max out and cannot provide your engine with enough fuel causing it to run lean.

                      I forgot the exact number but i think it was ~178hp that stock injectors start to max out.

                      Comment

                      • Mystikal
                        Moderator
                        Wheel Fitment Expert
                        • Nov 2003
                        • 9602

                        #12
                        Re: different fuel injectors on a stock e30?

                        Originally posted by erik325i
                        Originally posted by Jordan
                        Pointless on a stock motor.
                        to what degree of modding would you say should be done before getting larger injectors?
                        I'd say almost any worthwhile mod will max out your stock injectors. With just a chip I did.

                        Comment

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