I fell out with Kent over this about 3 or 4 years ago. It's been going on ages and I have been battering on out it on here for ages, but still people keep buying them.

The worst thing you can do is to let the car idle for the first 20 mins of its running time. 2500-3000rpm is what it needs. If you must drop the revs (for example if the car starts to overheat), turn it off. Best bet is to drive it whilst running the cam in, if you can do so safely, but still don't let the revs drop and try not to rev it much harder.

That said, even a miracle can't help Kent.