And in any case if you can stand up in front of the fan it's absolutely no use whatsoever for replicating full load conditions! You need wind tunnel conditions to get any kind of decent cooling on a rolling road. (Hence why I only recommend engine dyno's and live mapping)

Actually whilst on this topic let me make another comment regarding ACT's. You cannot judge how good an intercooler is from the rolling road. You need to do sustained high speed runs in 4th and 5th gear holding full throttle for at least 10 seconds. Only then can the suitability of an intercooler be judged! (I recall seeing some of the comics doing intercooler tests on the rolling road!! ha ha ha!)