Originally Posted by col cos1

a bit off subject but i had my car on a supposed to be state of the art rolling road 100k dastek job at extreme in witburn

the sheet said 456bhp at engine,and 357bhp i think at wheels

i asked him how its calculated,he replies its not the rolling road /machine etc is taking a reading from the engine

whats that about?

and the fact it was only running 25 psi

and usually is 30 psi i thought the at wheels fig was accurate as it was 373 at wheels on ava a couple of months previous