Both of the turbo'd slant sixes we copied had either 600 or 650 carbs on them, and both seemed to run out of breath at just a little over 5,000 rpm, so I bought a 750...
Apparently I shot myself in the foot... I can't get it tuned...:banghead:
Bear in mind that both of those smaller-carbed engines make it look easy to produce 500 hp...