It has been years since I had an engine on this dyno, but it was not at all generous with the numbers on the two Hemi engines I put on it in the past. In fact I was really disappointed with the out come on both of those engines.
I hear what you guys are saying, and I am just going to post what I have. Maybe you can look at the information and share your observation of the data. I am glad to learn from your experience.
Andy, I have your book and read about your cam testing on the 470, with exhaust manifolds.
These dyno headers were 2" diam. and I am going to use 1 7/8" TTI headers.

Mark