they can fiddle the corrected figures by adjusting ambient temp etc etc but afaik the wheel figures are far more accurate is the actual physical measurement is torque at the wheels (bhp is calculated from torque and rpm bhp = toque x rpm / 5252) ps my figures are 175 lb ft and 178 bhp both at the wheels ( i apply a rough tranny loss of 18% this gives approx 206 lb ft and 210 bhp corrected flywheel figures) my 1st rr day at stealth gave 29% tranny loss which would give 225 lb ft and 230 bhp which is just a bit dubious hehe