figure this one out... weird
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From: Palatka, FL
figure this one out... weird
Tonight I was coming home on the interstate and put the DP in 140 and mashed it. Truck was running great and then I backed out to about 7/8ths throttle and it pushed me back harder in the seat and the boost went from 24 to 27. I then repeated the test a few more times and even pushed it to 7/8ths throttle off the line and my truck has more power and makes more boost. The only other thing I noticed was that when I pushed the pedal to the floor, the engine got louder like more timing was added and the boost dropped. Does anyone have a guess as to why my truck does this? Could my truck have too much timing maybe?
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From: Palatka, FL
It could be the TPS but I just think its something else, seems to me that when its to the floor, something is dropping the power, the motor sounds like its really trying harder but it dosent make as much power. Mine does it in 80E as well as the 140.
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When you back out of the throttle, the IPR cannot dump the oil pressure quickly enough, and for the instantaneous split-second, the ICP spikes up high, and once the valve can dump pressure, things stabilize. I dont know if you were talking about that, or if i am crazy?
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From: Palatka, FL
I kinda figured that it was ICP spiking when it did it before, but that dosent explain why the power drops when I go from almost full throttle back to full throttle. Unless the HPOP cant keep up with the demand and the ICP falls. However, since I replaced my HPOP I have never set the low ICP code even with the 140 aggressive.
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I'm sure its your ICP dropping off at WOT. It may not drop enough to throw a code. . . as it has to drop pretty far to do so. But you will notice a seat of the pants difference. Mine was the same way. . . all until I went to big oil of course
Timmy
Timmy
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its the hpop not being able to keep up at full throttle. when i ordered my chip from jody i talked to him about this exact thing and he told me that the 120 tune will get you better top end performance and the 140 will get you better low end performance simply because the stock hpop cant keep up in the 140 tune higher in the rpms. switching to single shots will greatly improve the hpops performance since less oil is needed to fire the injectors or get a better hpop....