Thanks for the reply.
The track is short, and bumpy, with one straight away. The track i run at is in Homestead, wich is just south of Miami, i would say 20 minuts from the ocean maybe less. To be honest i have no clue what the engine comes with, i will take off the cooling head and take a look at it. I have 5 rc cars, and i rather just buy one type of gas for all them. (mrx4-r, CD3, Jato 3.3, Power racing XR-8, Cen Matrix) And soon a buggy, not sure wich one, mbx5-r, 8ight, mp 777.