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Can you look over my tune? 2.9L M20 Turbo

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  • SGT StudMuffiin
    replied
    Originally posted by citizen_insane View Post
    Agreed, that ignition table looks extremely retarded (in the technical sense). VE table looks a bit high on the top end, but that could just be due to your specific setup. If you're running electronic boost control, please also post your boost map.

    Have you verified your engine timing w/ a timing light? I realize it's not easy to do on the M20. On my car I made a mark close to the VR sensor pickup and then used an adjustable digital timing light to verify at multiple operating conditions.


    It is only on wastegate pressure right now, and my tuner said he did verify the timing with a light.


    Sent from my iPhone using Tapatalk

    Leave a comment:


  • citizen_insane
    replied
    Originally posted by ForcedFirebird View Post
    The m20 has an OlT mark on the timing cover and crank hub. ;)
    The one that you can't see because of the packaging of the rad/shroud/coolant tubes? I'm aware :D. Wasn't able to get a good read on my car by trying to use that mark.

    Leave a comment:


  • ForcedFirebird
    replied
    Originally posted by citizen_insane View Post

    Have you verified your engine timing w/ a timing light? I realize it's not easy to do on the M20. On my car I made a mark close to the VR sensor pickup and then used an adjustable digital timing light to verify at multiple operating conditions.



    The m20 has an OlT mark on the timing cover and crank hub. ;)

    Leave a comment:


  • citizen_insane
    replied
    Agreed, that ignition table looks extremely retarded (in the technical sense). VE table looks a bit high on the top end, but that could just be due to your specific setup. If you're running electronic boost control, please also post your boost map.

    Have you verified your engine timing w/ a timing light? I realize it's not easy to do on the M20. On my car I made a mark close to the VR sensor pickup and then used an adjustable digital timing light to verify at multiple operating conditions.

    Leave a comment:


  • SGT StudMuffiin
    replied
    Originally posted by tschultz View Post
    How did you generate these curves? A lot of red flags with each map you shared.



    And before we comment on the problems, what are your trigger/toothed wheel settings?




    I’d also like to add, that my tuner said that the car is like 99% tuned, we didn’t get to start on any power related stuff, just making it safe.



    Sent from my iPhone using Tapatalk

    Leave a comment:


  • ForcedFirebird
    replied
    Your timing table is too large for 10psi, and you are pulling wayyyy too much timing if your crank sensor setting are correct.

    You are dumping an immense amount of heat into your turbine.

    The timing table should look pretty stock below 100kpa

    Leave a comment:


  • tschultz
    replied
    How did you generate these curves? A lot of red flags with each map you shared.

    And before we comment on the problems, what are your trigger/toothed wheel settings?

    Leave a comment:


  • SGT StudMuffiin
    started a topic Can you look over my tune? 2.9L M20 Turbo

    Can you look over my tune? 2.9L M20 Turbo

    Hey guys, so I’ve almost got my car on the road. A little while ago I was on the dyno and the headgasket blew due to an improper installation. I just want to make sure that the actual tune itself is safe and didn’t likely cause the failure.

    My engine setup is a 2.9L M20 with M52 crankshaft, VAC rods, 9.0:1 CP pistons, ARP hardware and studs, VAC cutting ring headgasket, and a built head.

    I’m running a MS2PNP with wasted spark on US 91 equivalent fuel at around 13psi wastegate pressure.

    Here are some screenshots I took from TunerStudio.

    If you have any questions let me know. Any help would be greatly appreciated


    Sent from my iPhone using Tapatalk
    Last edited by SGT StudMuffiin; 07-17-2018, 09:24 AM.
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