Quote:
Originally Posted by bogieboy
nascar runs pushrod motors to 10,000rpm  and makes 850hp out of 358 cubic inches...
using that power to displacement number, a cg200 should theoretically be able to make 28hp, and a 250 theoretically could make 35...
wouldnt that be nice..LOL anyone got any ties to nascar engine builders? see what they could come up with for a china bike...LOL |
Yes, it's possible. NASCAR did this by moving the camshaft as high in the motor as it can go, making the pushrod lengths very short. With less mass to move, the engine can spin faster. Using exotic, expensive, ultra-light materials also helps with this. With deep pockets you can do much. But the only reason NASCAR does this is because the rules say you have to use pushrod engines. If they continued to pour money into motor design without the pushrod restriction, I guarantee they'd all be running dual overhead cams. You can just make more power that way.
Charles