Car-Boy -> What motor is best? (9/23/2007 11:54:47 PM)
I own a HPI RS4 18SS with a O.S 18TZ(1.8hp) engine. I want to upgrade to an O.S 18TZ EB MOD(2.23hp). Do you guys think this is the engine that will give me most speed and power or would there be something else better than O.S? and what is a good, good pipe to use with these high powered engines?