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Message: [QUOTE="GreenF350, post: 830606, member: 7731"] Here is the short version of my question....Why on my "120hp" tune does my ICP run between 1700 and 2100psi, but my duty cycle "pegs out" at 79.5% and doesn't go any higher? The background info....I knew my HPOP wasn't doing everything that was being asked of it, but since I am really close to pulling the trigger on some injectors and tunes to go with the head studs, Valve springs, etc that are sitting in my garage waiting to go on I figured I would check it out and see how it was doing. I have one of the Scan Gauges and did a full throttle run from about 55-90. The ICP showed right at 2000psi +/- 300psi and the duty cycle steadily climbed until it got to 79.5% and then it stayed there for the rest of the run. I'd say a new/upgraded HPOP is in my future, but I was just wondering why the duty cycle never went higher? I find it hard to believe that my "120hp" tune only calls for 2000psi at WOT, so is it a case of the gauge not reading correctly or do I have another issue to look for? Truck runs fine, so no obvious issues. -Aaron [/QUOTE]

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