My engine builder, who's been at it for nearly 40 years and has built everything from Indy winners to AA/Fuelers says the same thing as the engine builders Turk refers to. Tom Kirkham got downright angry with me when I pulled a chassis dyno run. It's as if the REAL ones know better. Yes, a dyno is great for initial startups and tuning--but comparing measurements between motors using different dynos seems to be nearly impossible from reading everyone's opinions over the past few years.
It's like all the horepower gains advertised from different products...add this air filter for a 20% hp increase, this carb for 50%, etc. I added up all the extra length I could gain from the spams--44 feet long and still counting!
