Quote: Looking forward to the dyno results. That is a bunch of work. Brett, how much hp do you think this manifold is worth over a standard chapman intake?. A decent amout I am sure.
Hard to say but this should shine on larger CI or hight RPM.
I would say on high RPM 400 CI it would be 35-50HP better than old truck intake.
It's 6.250" long runner and its all but 5" at Plenum tappers to 3"
