Thank you guys very much for the info it makes me understand these cars alot better, as for now im only running stock with the revo and jato. what running temp. would u guys recomend on these engines ?that would be considered taking care of the engine, ive been running it between 200- 220 F since thats what the guy at the hobby shop where i got the car recomended for break-in and said maximum temp. should not go over 250F. The revo almost have a gallon gone so this weekend im gonna probaly try tuning it some with the low end needle since i haven touch it from factory setting, and the engine would not idle for long unless im giving it some gas back n forth..........Any more advise on good tuning? would be happy to hear it the more the better since im a newbie to this, but im getting to like it alot and looking foward on forming a local club with some friends. so guys just tell all that info i need to know, and again Thank you very much for the help.[sm=biggrin.gif]