Do you reckon the bhp figures are accurate?
Not likely. It requires care to get an accurate figure out of a rolling road in any case and there is plenty of scope for massaging the figures to "compensate for the losses".
Many rolling road operators just tell the punter what he wants to hear so he goes away happy, especially if they have done the tuning work, as appears to be the case here.
Kevin
I reckon you're dead right there! Me and my sons race a grasstrack Mini and they are supposed to be more or less standard 998cc engines which are about 40bhp.
Some people reckon they've been rolling roaded at anything up to 70bhp, but as far as I can see , they all seem similar in performance , so someone's telling porkies.(The faster one's are just better drivers but no-one wants to admit to being beaten by someone more talented)
Anyone know of a way to measure acceleration figures accurately, seems to me if you can do that you can figure out whether you've increased the performance of your car or not .(Assuming you haven't got an F1 type budget !! )