compression question

[dustinb]

well my pro x 265 motor has 211 lbs of compression. i have been running 93 octane in it for a little while. will i notice a difference switching to race gas? i can get it here for about 6 dollars a gallon

[86 Quad R]

if you are running 211 psi's of compression you should be running hi oct fuel. otherwise your going to kill your engine if ya continue to run pump gas.