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Thread: Boosted S550 hitting throttle cut around 6500 rpm logs and tune attached

  1. #1

    Boosted S550 hitting throttle cut around 6500 rpm logs and tune attached

    Can anyone tell me what is happening to make my throttle cut at 6550 rpm? I monitored DRIVER DEMAND LIMIT SOURCE and it says No limit. Any help would be appreciated. This tune was a Whipple tune originally that has been adjusted.

    2015 Mustang GT
    Whipple Stage 2 Gen 2 with 3.625 pulley
    Tremec Magnum XL (just done)
    ARH 1-7/8"
    3" Exhaust
    3.31 gear (for now needs to have 3.73 put back in)
    170 thermostat

    Cars runs well, not perfect. I'm sure theres some things that need adjusted.

    Thanks
    Attached Files Attached Files

  2. #2
    Tuner
    Join Date
    Aug 2015
    Location
    San Antonio, TX
    Posts
    179
    I'm not sure what's wrong, but compared it to my turbo tune and noticed the following:
    1. Your MAF limit is enabled
    2. Try cylair multipliers of 1.99, both
    3. I have anticipation disabled
    4. Max aircharge load is 1, this should be higher for boost
    5. CLIP max torque, try put that back to stock
    6. Maybe update you IPC torque max and load max
    7. Your lambda is not right until 7100rpm
    8. Log throttle angle source to see what it says

    That's a few things different to my tune, but not sure it will solve your problem

  3. #3
    Tuner in Training
    Join Date
    Aug 2015
    Posts
    23
    Plimmer do you know what size the tube is that your mass air is in. I am running a 3.5in and looks like i a may be maxing out my mass air on only #7

  4. #4
    Quote Originally Posted by Plimmer View Post
    I'm not sure what's wrong, but compared it to my turbo tune and noticed the following:
    1. Your MAF limit is enabled
    2. Try cylair multipliers of 1.99, both
    3. I have anticipation disabled
    4. Max aircharge load is 1, this should be higher for boost
    5. CLIP max torque, try put that back to stock
    6. Maybe update you IPC torque max and load max
    7. Your lambda is not right until 7100rpm
    8. Log throttle angle source to see what it says

    That's a few things different to my tune, but not sure it will solve your problem
    The car doesnt see the end of the maf scale to hit the maf limit.
    I dont see where you're seeing my lambda is off?

  5. #5
    Senior Tuner veeefour's Avatar
    Join Date
    Oct 2016
    Location
    Poland
    Posts
    1,743
    After a shift you have lambda 1 and not WOT commanded lambda around 3:56 mark. Then @ mark 4:00 it goes to WOT lambda again and enters the speed density I assume.
    I think it may be hitting your 1.85 max load parameter.
    Last edited by veeefour; 03-25-2018 at 11:39 PM.