Their dyno is odd, as I said. But 410 bhp seems pretty accurate. Other cars there were very accurate, ie an S2000 ran 242 bhp and so on.
But I'm going off the SRR figures of 345 bhp at the wheels, not really interested in p(ub)hp.
DRZ said:The WHP figures are low because of the extra contact patch. The coast-down measurement factors in this extra drag and the drivetrain losses to calc the (accurate) flywheel power. Each wheel touches the dyno in two places (the wheel sits in between two rollers), whereas on a lot of other dynos there is just one roller.
They had a software update last year to make it more accurate.