Originally Posted by
Glowgeek
Well, I don't understand why not. With a variable speed pump (engine) pushing some air into the tank and some air through a needle valve (solenoid), it seems logical that more pressure would develop in the tank as rpm increases. I can't see how it would simply push all that extra air out through the solenoid without some kind of rise in pressure. I thought we had seen Chris prove that theory just a few days ago by varying the speed of his air pump while using a needle valve tee'd into the line. All I'm proposing is to try the solenoid as an air bleed instead of the needle valve.
I'll do some pressure testing tomorrow.
That would work with a 2 stroke... 4 stroke you would have to close the solenoid valve to increase tank pressure as the blowby would be greatly reduced with rpm... just enough to operate a diaphragm pump with the reciprocating pulses caused by the piston moving up and down through an unchecked crankcase breather... you could add a second one way check valve in the crankcase to draw air in, and the piston would displace the crankcase volume out the breather. that would work throughout the entire rpm range then.