ram air, hmmm---I guess this is what I suspected. ram air would have
been too easy. except the part that I would also need more fuel. I
thought there was an efficiency loss due to not enough air, of course
counterbalanced by the fact that I can lean the mixture.

I presume there are no (bicycle or) other pumps that are both
affordable and that could do a decent job (aid efficiency a lot more
than they reduce it). it seems odd for our engines to remain
essentially oxygen starved, or to have a turbo which costs $20k and
seems to cause all sorts of reliability problems on top of it. one
would think there could be low-priced ways to help the situation at
least a little. but such is life...

thanks for all the info.

regards,

/iaw