Thanks for the replies!
Beater,
That link you provided is one I've read several times. I have no doubts that the modifications others talk about will bring great gains in both horsepower and torque. Like you, my concern is where in the RPM range do these increases, and decreases actually happen.
CNC-Dude,
What you say supports what I understand about the dynos that most use. I'll do some more research to see how the Diesel engine builders test their engines.
Well,
I read somewhere years ago (in an actual book!) that GM uses something called "Steady State" dynamometers for engine development. The idea is they can hold an engine at a steady RPM, then try different spark advances, throttle openings, fuel ratio's, etc to see what combination gives the best output. I'm guessing by testing at incremental RPM levels, this helps them develop correct distributor advance curves and camshaft profiles and who knows what else. The GM engineers where not dummies, that's for sure!
Thank you Gentlemen.
David
