Hi guys, going on a rr this coming saturday, a dyno dynamics at Ajec Racing in gloucestershire. Since I went on a rr last time I have gone up from 17" to 18" wheels (heavier as well as larger) and bigger brake discs on the front. I'm just wondering what effect this could have on the figures, would the extra weight (unsprung I think...) have a negative effect on the power? Do they take the wheel diameter into account on a rr like they do with a delta dash? Anyone been on Powerstations (maha?) rollers and a dyno dynamics, what differences were there??

Cheers
Iain