I'm Looking to get a racing engine for under 300.00. can you point me in the right direction. I want to run 30% Nitro . Right now I have the stock Lightinig with a 645 metal gear high torque servo and Running 5,7,1 in my Diff's and 30 and 40 front and rear with the stock shocks and I like how it handles. I broke it in with 20% for the 1 -1/2 Gallons and then started with 25% today when I finish a tank of fuel i'm at 260 degrees any pointers on tuneing??? Any help would be greatly appreciated thanks.................................. James