Stage 4 Mods – Engine Rebuild – With Dyno..

[Gambit]

That boost chart looks marvellous, starting to ramp up at 3100rpm and hitting target boost at 3600rpm, thats a 500rpm window which is very impressive. Got any pictures of your car with the Kahn 19's?

[jaydece]

this is what I posted on gambit page regarding dyno torque readings: -

So how would you read it in to Nm? take off a zero or something?

Doesn't quite work like that: - but as a rough as guts.....you could go that way....here's how to kinda check your theory....

It's very hard to calculate and get the right reading...many factors involved...but roughly.....to convert tractive effort to engine torque is = Tractive effort(N) * tyre rad(m) / diff ratio/ gear ratio

example: - using gambits reading and adding some kinda made up numbers...i think the diff and gear ratio for the 6 speed is right.....

TYRE: - 215 / 45 / 18' = 325.25mm rolling radius to m = 0.3253m
DIFF RATIO: - 3.545
GEAR RATIO: - 1.137 ( 4th gear )

so.....7000N * 0.3253 / 3.545 / 1.137 = 564.94Nm torque

now....to check if this is kinda accurate you use 564.94Nm * 0.25% ( losses from engine to wheels estimation people go by ) = 141.235Nm + 564.94Nm = 706.175Nm at the engine + -

This is why people go by removing a zero from there dyno read out....cause it's kinda accurate but not......

I THINK! I could be VERY wrong here...