Hi Tom I think there are a lot of factors here to consider. From Scotts comments he would have you think it's essential, however I have never owned a dry sump car, and have done plenty of tack days and so far not blown anything up (yep). The factors I think are 1. The track, some tracks are going to cause you more problems than others. I guess long high G corners are the things to avoid. 2. Tyres, more grip mean more G 3. Your ability to exploit the limits and high G. Can you push the limits of your car in the corners. 4, Oil system design. I have spoke to a few Caterham techs, and they where of the opinion the 420 had the dry sump for packaging reasons, i.e. it's fitted to justify the price increase over the 360 more than the owners need for it. If that's true (or not) what we could be saying is the SuperSport R and the 360 R are cars that shouldn't be driven on the track, and I don't think that's the case, because your car would have already expired given your track activity. Finally how much faster will you be cornering given the extra power? I suspect not much, after all "adding power makes you faster on the straights, subtracting weight makes you faster everywhere" is quote Colin Chapman quote. I am sure Raceline has the answer ;-)