Did those figures come from a write up from Nick?
Now doing my math's, if Peppernicks was 222BHP at the wheels standard, divide that into the flywheel ouput of 286BHP, give you a figure of 0.776 (drivetrain lossses). Divide the new figure of 270BHP, at the wheels, by 0.776 ( to allow for the drivetrain losses) give a flywheel figure of just under 348BHP!!!!!
I am sure thats how you would work it out - correct me if Im wrong??