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Thread: Car power leveling off after 6800rpm

  1. #1
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    Car power leveling off after 6800rpm

    Was wondering if some one can take a look at this log and see if they see anything out of the ordinary. The cars power just seems to flat line around 6800 or so. 2013 mustang gt, mt-82, Mods are 15 short block, Boss exhaust cams and springs, cobra jet with twin 65 throttle body, id1000s and a custom single turbo kit on 7 pounds. Thank you in advance
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    Last edited by 2damslo; 03-19-2018 at 08:11 PM.

  2. #2
    Senior Tuner veeefour's Avatar
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    I can't see any major problems in your log besides bunch of knock activity. Your tune is protected for Remote so we can't open it either.

  3. #3
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    Looks like your MAF is pegged at less than 93 us. You are not getting over 57lb/min. At 7psi your MAF should steadily climb and load should be flat around 1.4-1.5 as RPM climbs. Instead your MAF is flat and load drops as RPM goes up. You may need a larger pipe for your MAF to be in and get your period higher so that you can rescale your MAF curve. I suspect the injector data may have been manipulated to correct fuel trims instead of airflow. at 7psi I think 12* and 2* of knock advance is very low. should be 18* or higher with decent 93 octane.

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  4. #4
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    Thank you guys as far as the tune how would i un protect it to so you can see it. The charge pipe is 3.5in not sure how much bigger i would need to go as for the injectors its id1000s data from there website. All the fuel tuning i have done has been with just the maf

  5. #5
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    As for the knock it was at part throttle and tip in i have been getting that cleared up a little at a time

  6. #6
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    Try this i re uploaded it
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  7. #7
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    Still doesn't work, you might need to clear the master/ slave under the calibration details. Save then reupload.

  8. #8
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    ok that cleared the numbers
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  9. #9
    Senior Tuner veeefour's Avatar
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    Max load only 1,25 under desired air mass. WOT multiplier 1,9? plus aircharge load at WOT.
    Last edited by veeefour; 03-19-2018 at 04:02 AM.

  10. #10
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    So should those numbers be set higher?

  11. #11
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    look at optimum power load at wot vs rpm it goes from 1.02 at 5400 to .96 at 6000. Should those numbers decrease in rpm ?