Originally Posted by
Rod-Tarry
Do a Topspeed run with 35 sec at 100% WOT then report back Andy. You will have no probs with a 5sec squirt around the ring road whatever your Power. The vents aid cooling so if you ever intend doing a Vmax to see what it will do change the bonnet.
Can definitely see it being a factor held flat out for a long period as you have seen all these problems. Mine being used on the road with high power levels as you say impossible to hold flat out for a long period