It's actually the other way around - light pedal at idle, heavy pedal at WOT. The rear of the cylinder will have constant vacuum, the shaft end will be exposed to manifold pressure . Because of the shaft deducting a portion of the surface area on the forward side of the piston, some force was lost. Hopefully the approximate 5 lbs of additional resistance will be adequate.
Mcmaster-carr has those cylinders for about $20.
And thanks, I've gotten mostly nothing but criticism since the idea, but hey, I admit a lot of my ideas don't work; however, some do.
