Hey guys can someone help? I am trying to improve run time on my FM .21, I am getting max like 7:30 in my MBX6. I have the 2013 and 97t plug. I have about a gallon and a half on the motor, and it usually comes in temping around 215. I am not a really smooth driver but it seems like I should get a little better than that.

Oh I am running aluminum shoes and 1.0 springs with a 13 tooth bell.