The cooling fan is huge. On full it will pin you against the bonnet. So no problem with cooling. The dyno itself i think is a bit of an unknown as I believe it to be the only one in the country. Getting a back to back with SRR & RCM will be fantastic. My car has been on & off this dyno more times than a cheap whore. To other's that use it for mapping like Paul Egerton & Dave Rowe think it's a tad conservative! We will find out I hope. :EVO: