[AaronD]

Hmmm... that seems counterintuitive. I take your word for it because you've obviously done your research judging from the rest of this thread. But without knowing any better I'd assume that a higher inlet velocity would mean more friction for the incoming air at that RPM. Which would seem to say that less total air/fuel makes it to the cylinder, and lower torque or horsepower would be the result?

I guess you always have the option of opening the carbeurator further to get the same air/fuel charge as with a slower inlet velocity? Which then means that you simply have a lower top end because the maximum air/fuel mixture that can be let into the cylinder at high RPM is decreased?

I dunno, just trying to follow the logic. Any help appreciated. Thanks in advance.


AaronD...

PS. I guess I'm thinking of the flow test you did on the new 250 head on the previous page of this thread. Apparently there is enough more restriction in the head than the carb that the restriction added by going to a smaller carb is not noticed?