AH64ID
TDR MEMBER
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I don't 100% why, but I have heard that the performance cam's don't exhaust brake as well as the stock cam. I beleive it has to do with the duration and overlap from intake to exhaust. In an effort to retain as much braking as possible I went with the Stage 1 cam. I do know that rpm for rpm the Stage 1 has lower backpressure than the stock cam. The truck feels about the same, but there is lower pressure until about 2500 rpms. I also noticed that my IAT's will slightly increase under EB use now, where the never did before. . tells me the overlap causes a little back flow, very little the IAT's only go up 6-10* F.
Just what I heard, and from what I have seen I could see the backpressure decreasing even more with a larger profile cam.