Announcement

Collapse
No announcement yet.

Turbo woes

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Turbo woes

    Hey what's up guy listen I am having a issue with my turbo e30
    Here is the set up
    M20 stock
    Arp head studs
    Bimmer head turbo cam
    Holset turbo
    Whodwho megasquirt
    Here is the issue every time I do a wot pull the car lean out at about 5000rpm
    I try adding fuel with in that rpm did not do anything. These are the things I change
    Fuel pump
    Fuel filter
    Injectors
    Fuel pressure regulator (adjustable)
    And I can't find Keith aka whodwho please help.

    #2
    Sorry still haven't had a chance to look at your files, I will dig them up in the morning. are you sure it isn't running out of injector? Do you know the duty cycle they are reaching? What fuel pressure are you running?
    My M20 Frankenbuild(s)
    4 Sale - Fully Built TurnKey Megasquirt Plug and Play EMS

    Comment


      #3
      The fuel pressure at idle is 50psi don't know what it is at 5000rpm
      Duty cycle at 5000rpm is 55% I am using decker 60 lbs injector

      Comment


        #4
        Try turning the AFR targets off? Keith has more insight but I had a similar issue where it would break up pretty bad going into boost when I turned that on. Turned it off and she screamed to 7k.
        1989 325i - 2.7i, Holset H1C, 42lb injectors, 14.7 psi, whodwho MS-PNP.
        2009 X5 - DD Duty
        2018 VW Atlas - Wife/kiddie/grocery hauler

        Comment


          #5
          Ok thanks reds I will try that and report back

          Comment


            #6
            The afr target was already turned off Keith send me a new tune.
            Could get the car to run right so I use some of his setting with my old tune.
            The car now pulls all the was to 6000rpm where it seem like sine know d if cutting on.
            I was going threw the setting I notice Keith AKA whodwo has the coolant cut at 180 degree
            To 6000rpm and 200degree to 6000tpm as well. I am gonna change it and see what happen
            Any suggestions.

            Comment


              #7
              Congrats on your turbo project!

              Have you had a chance to confirm your base timing? You should be able to set your timing to fixed in TS and with a timing light at idle confirm that MS is seeing the actual engine advance. If it reads advanced/retarded you will need to adjust your trigger angle* settings.

              If your base timing is all good I would preform a tooth log next. If the resistance in the CPS circuit is set too high you will experience sync loss in the higher rpms. It will feel like a rev limiter kicking in and may cause a backfire, TS will generally show a sync loss count when it happens.

              You shouldn't need an adjustable FPR with MS since you can adjust your injector PW. A stock FPR should work fine and eliminates another variable. An adjustable regulator would really only be nessasary if you were still using Motronic and couldn't adjust your fuel map, or if your injectors were too small.

              If your unsure about reading the tooth logs you could post a screenshot of the log here.

              Best of luck with your project!

              Comment


                #8
                ok thanks golfer my base timimg is good.I did not data log this run yet but i will.Now let say
                it does loose sync at 6000 rpm,does this mean my cps is bad.

                Comment


                  #9
                  Hey guys keep hitting some kind of rev cut a 6000rpm
                  Change the cps still the same thing. Help please

                  Comment


                    #10
                    What's your ignition setup?

                    Sent from my SAMSUNG-SM-G891A using Tapatalk
                    Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                    IX being restored here

                    Ix turbo build here

                    Comment


                      #11
                      Wasted spark


                      Sent from my iPhone using Tapatalk

                      Comment


                        #12
                        What plugs and what gap? Is it only under full throttle?

                        Sent from my SAMSUNG-SM-G891A using Tapatalk
                        Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                        IX being restored here

                        Ix turbo build here

                        Comment


                          #13
                          Turbo woes

                          Plugs are 7heat range gap 22
                          No not only under full throttle


                          Sent from my iPhone using Tapatalk

                          Comment


                            #14
                            So it's not cylinder pressure related, sounds like it's still losing sync. Run the composite loger in tuner studio

                            Sent from my SAMSUNG-SM-G891A using Tapatalk
                            Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                            IX being restored here

                            Ix turbo build here

                            Comment


                              #15
                              Ok I will try that
                              Hey what skip pulse in tuner studio


                              Sent from my iPhone using Tapatalk

                              Comment

                              Working...
                              X