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Power Strokes
6.4 Aftermarket
MCC / DIY Tuning for 6.4
VGT off?
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[QUOTE="Dzchey21, post: 903171, member: 63"] set it to a low, but realistic number. I would say if back pressure desired was around 40psi it would drive good and still open the vanes fast enough to let the turbos keep up to the back pressure so to speak. 2100 was just a number i through out, honestly 2500 rpm is probably more realistic for a tune you would use on the street. What i would do is drive a little and kinda pay attention to what rpm the back pressure starts to get high and use that as a guide to when you want to start triming back. Give the ECM and turbos enough time to react, so work your way into it before that number So say 2500 rpm is when you would like 40 psi back pressure, start tapering from 50 psi at about 2300 and then at 2400 45 psi ect. Mainly so there isnt an abrupt change in the tables making the vanes bounce hard if you find yourself riding that fine line at half throttle or something [/QUOTE]
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