[The Newell]

Most coaches come with somewhere around a 65 or 70, with a hp rating of 275-300. Putting 9G90's in a 6V-92 can boost it to 350HP if you have all the right bits and pieces in the engine. If not you will get a little more power and a lot of smoke.To make a clean 350hp the engine needs to have 1.05" cylinder ports, a 38 tooth gear on the blower drive, standard timing,a by pass blower, a turbo with an a/r of .95 to 1.08 on the exhaust side and a fuel modulator to prevent smoke untill the turbo boost is up. 9G100's would probably make 375hp, but I don't think you could get it off the line without a lot of smoke. Plus it would be tough to keep cool.