Originally Posted by
vertical grimmace
No more pressure than a regular tank. It just puts the pressure where it is needed. At the clunk/fuel pickup. In many CL models, the tanks just use the ram air into the Uniflow vent. Many of these engines did not use mufflers. Ram air, or muffler pressure will work.
Ahh, I think I understand now. Hence the need for the vent/pressure line to have a clunk. I am thinking the pressure and engine lines would need to be pretty close to the same length as well for it to work the best. And with a clunk on both lines, it keeps them close to each other.