Quote Originally Posted by markct View Post
I think if it would work the best way would be eliminate the drivetrain and put a light spring on intake valve and a check valve in spark plug hole.
I agree. The idea just didn't seem cost effective, your basically making an air compressor so that's the road I headed down. wdchuck is right, an air compressor is an air pump that's made to dissipate heat well. I made two for a friend who has 2 400 tap setups and so far they are working great but we'll see how it goes this season. We are using a 7.5hp 35cfm single stage compressor and running it with 3hp. Pulls 25" deadheaded and we have been getting 23-25 in the woods. Im sure its not a 35cfm pump but who knows how it compares to all these other pumps that claim high cfms on their stickers. We haven't had a hard run yet so we'll see how these pumps do when the trees really start pumping.