Originally Posted by
cossie51
Steve that is some impressive power and torque for what is a standard bottom end with just long studs 👍🏻 I was under the impression that you needed forged pistons if you were going much over the 500bhp mark.
I told my mapper to give me something between 450-500 as didn't want to risk blowing it up as bottom end is still standard internals apart from valve cut outs. Forged bottom end was next on my list when It comes off the road at the end of this year. Maybe I should save myself some money and just push it a bit harder as it is.
Hoping manifold and turbo will be fitted and mapping should start next week.
That was on an engine dyno mate, I know rods lost 29 hp 36 ftlb engine dyno then onto motorworx rollers
Im not saying this one has I don't know but just thought I'd mention it as the figures were in my head anyways
The spool was alot different aswell of the turbo about 1250 rpm difference
While the headline figures are close within 30 hp
Engine dyno
And chassis dyno of exact same tune in car
Now if I overlay the 2 plots from 6600 rpm and above the curves are almost identical just 30 hp apart
But from 4000-6250 rpm there is a huge difference
Now above 6600 rpm the load is irrelevant as it's making full boost anyway and the power curves match, but below 6600 rpm it's the high load of the engine dyno causing the early spool that is simply not achievable while driving the car
What I don't know is is wether the superflow engine dynos have user adjustable load points or if there pre set and operator goes through all the presets so to speak ?
It interests me as it helps to understand real world performance from dyno plots if we can disect the data and make it comparable, which for rods there were huge differences