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Thread: 6.7 Cummins 07.5-09

  1. 08-22-2016 #1
    Orange Stroker
    Orange Stroker is offline
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    6.7 Cummins 07.5-09

    Who has done tuning on 07.5-09 6.7 tuning with hp. Are you able to get above 3800 RPM?
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  2. 04-12-2017 #2
    DUALLY
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    I have the same problem, Have tried multiple things to try to get above 3800 RPM. On this truck it looks like rail pressure starts to drop around 3400 and continues until it starts to cut out at 3750 RPM. Losing roughly 30 MPA until it cuts out.
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  3. 09-26-2017 #3
    subiboost
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    how are you guys getting past the stock locked file ? wont even let me read file to mod it ! 2008 6.7 cummins 6 speed
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