hi. im just wondering about how a rolling road calculates flywheel bhp from the wheel bhp.

what im wondering is for my car now with a lightened flywheel and lightend pulleys and no air con it has gained more wheel bhp but obviously not flywheel. i understand that bit.

but what im confused about is how a rolling road would interpret this. if it sees more wheel bhp is it going to over calculate the flywheel bhp? does that make sense. so for instance if my car standard was a genuine 170bhp (not likely) and stock for argument sake it had 130 at wheels and my modified one had 140 at wheels would the computer inflate over the 170 when it estimates flywheel figures?

am i making sense? hope so but thanks for input