Originally Posted by Cab_Burge
I have had motors on the engine dyno start to nose over around 5000 RPM and then start to gain power again above 5300 RPM, more than once confused work
if you test it some more on the engine dyno try taking it 500 RPM above peak HP rpm to see if it is done or not twocents(unless it is starting popping and backfiring through the intake down)


I'm under the gun to get the truck together so engine testing is kind of done for now, I can test it some more on the chassis dyno once all the gears are broken in. Although making engine part changes in place on a truck so big kind of sucks..