Originally Posted by
stu21t
So a dd roller bases it's engine figure on a 15% transmission loss on a 2wd and 21% on 4wd
wouldn't a fwd car have less tranny losses than a rwd? Due to no prop and a built in diff?
And wouldn't a Subaru style 4x4 have less loss than a Cossie style? Again due to the built in front diff? No seperate front diff n prop.
I think it might be something like 15% for FWD and 18% for RWD actually mate, apologies for the misleading way I wrote "2wd" instead of "fwd".
And yes the losses on different cars of the same type are of course different, but wont be handled differently by the DD rollers, as they cant possibly be.
So if you fitted a straight cut gearbox to your car and DD'd it before and after, the wheels figure would go up a touch, and the losses would stay the same percentage so its guess at flywheel would go up a touch as well.