Originally Posted by woody woodworth
I see that the horsepower is bigger above 5000 but if it is 2 cyclinders more than a SRT6 why is the power down below our 330? I can only guess that the power is wheel but I have seen others dyno above 300 hp also using 6 cyclinders.
The loss of bottom end power is significant also, Woody
4.3L M113 stock engine is 275hp at the crank.
3.2L M112 AMG is rated 354hp at the crank @ 1 Bar boost.
The guy's dyno chart is showing a 20% drivetrain loss on the N/A run. Assuming the same carries over to the boost portion, his boosted car is putting at 412hp at the crank @ 0.55 Bar boost. That's almost exactly 1.5x the power with 1.5x the air pressure.
If intercooled and running 98+ octane pushed to the same boost as the AMG 6-cylinder, he'd be making 2x the power or 550hp crank/ 440hp wheel (assuming that his supercharger could efficiently blow that mass of air.)
The M113 is not a great V8. It's the old SOHC design that we have on our Crossfires, not the newer DOHC V8's with 32 valves. It doesn't rev high and therefore its horsepower will always be limited.