you guys have to remember why roar was created it was made up so that the average person could buy a kit take it to the track and he or she could be competitive meaning they didn't have to put 3 grand in one truck or car. I believe there should be a line at which you have to stop with engine size the cars or trucks can only handle so much hp anything more than it can handle is a waste. and to answer someones question about the o.s. .30 yes they had some bearing issues at first but claim to be getting there bearings from a different company now and should be fixed. also the o.s. .30 is a abn engine so its going to be short lived anyway. also there are a few engine now .30 or larger they wouldn't be making a rule for one engine maker collari has .32 racer edge has there .32 ofna has a .32 there are quite a few but they have to draw the line somewhere to keep it on a level playing field my personal thoughts on bigger motors if you feel you need them learn how to drive it better that will get you around the track much better than a big motor