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EFI discussion

Scheduled Pinned Locked Moved General Technical
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  • B
    B
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    wrote on last edited by
    #14

    Must be like the crystals that you use on RC car radios to change frequencies 

     31-radio-frequency-crystals.jpg

    I could see overclocking being a sort of novelty computer geek project coupled with a piggyback or some signal controllers so that you could manipulate a stock ECU but theres definitely no NEED to do so when Megasquirt exists.  

    fun fact for computer geeks: The Siemens MSS54 ecu in the E46 M3 is a 32 bit dual core processor.

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    • B
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      wrote on last edited by
      #15

      240sxguy said:

      There isn't any reason to overclock an EFI system IMO, if it's not fast enough to do what it needs to do it needs to be upgraded. An automotive environment is very harsh and I would want a processor loafing along as cool as possible given the choices.

      This is a good point. I'd rather be sitting in my office and have my PC fail from an overclocked processor than be in my car out in the boondocks with a toasted ECU :D

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      • YoungCRY
        YoungCRY
        YoungCR
        wrote on last edited by
        #16

        I've gotten very interested in EFI, something I definitely wanna do down the road but I'm gonna try getting it running on the original L-Jetronic first  :rolleyes:

        Chris Young
        BMWCCA #458972
        1986 528e/5  | 1994 530i/5 | 1995 540i/6 | 2013 X5 35d | 1998 C1500 Suburban | 1995 K2500 Suburban

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        • B
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          wrote on last edited by
          #17

          L-jet is a nice simple system and easy to maintain. Let me know if you have any issues with getting yours to run nice and crisp. I was compelled to learn all about L-Jet on my E30 since it misfired, hesitated, bogged, and barely ran when I first got it.

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          • B
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            wrote on last edited by
            #18

            This is what 4 degrees of timing advance @ full throttle was worth on todays tune run.
            Tuneszpsd726b014.jpg

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            • KaiserRollsK
              KaiserRollsK
              KaiserRolls
              wrote on last edited by
              #19

              ^ good thing we can all see that photo

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              • B
                B
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                wrote on last edited by
                #20

                Nice try at rustling my jimmies.

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                • B
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                  wrote on last edited by
                  #21

                  And here is where I am at today with some fuel adjustments vs. my baseline run (Tune A). 

                  The AFRs are getting better and better. I recorded a few datalogs to sit down and disect tonight so that I can make preparations for the next tuning session. I know there is some more power to be found though.
                  TuneDzpsb6111b51.jpg

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                  • KaiserRollsK
                    KaiserRollsK
                    KaiserRolls
                    wrote on last edited by
                    #22

                    it blows my mind how many hidden hp's can be found just by tuning.

                    nice work Brian

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                    • Brian.B
                      Brian.B
                      Brian.
                      wrote on last edited by
                      #23

                      EFI amazes me. Tunes do Subaru's HUGE wonders. BMW's can pick up a pretty noticable gain. But the vehicle I've noticed that picks up the most notable gain in HP/tq and smoother power climb, is subaru's and porsches. Dunno why, but they can really pick up a nice amount with a good tune. Even all factory

                      instagram @howdoyoudrivethat

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