Power at wheels and flywheel

[Driver]

Hi,

I dont know if anyone can help, just curious how i can find out how much power i have at the flywheel.

i have 124kw at the wheels

Is there a way of working it out?

Thanks

Brendan

[RadiuM]

as a guestimated guide, say you have around 30% loss through the drivetrain ( around 25-35% ive read around the place ).

124 * 1/0.7 =~ 177 KW and they have about 180KW at the engine or thereabouts (stock)

but then again, it also depends on what dyno you have placed your car on aswell

too many damn factors.

i usually just say (as a rough guide of course) whatever HP at the wheels, thats how many KW are at the engine because when you do the coversion 30% for loss, then 33% conversion factor they roughly equal the same.

Shaun

[rev210]

put the engine on an engine dyno is the only way to be sure.

The rear wheel dyno measures tractive effort and then calculates horespower. Tractive effort is affected by gearing and therefore lower gear runs read higher, this is why 4th gear is preffered.

Making the calcualtions of torque and power at the engine introduce further mathematical error range.