I think so, even if we totally bypass the WUR by tying the lines together to get the lowest CP, the plunger will still need a little force to operate, and the lever ratio will help. It might also help with resolution, large arm movement, small plunger movement.

That would clean things up nicely! But if you use a MAF, that may add a little plumbing, but not much. Just your typical MS1 with the built-in MAP might be easier for a prototype.

Like you, I think the trick is the proper actuator setup, with good resolution and accurate control, the electronic contol of actuator should be fairly easy.

Looking forward to your progress!

Dose that take us back to using a Frequency Valve. Again-- cheap parts, developed controllers, very accurate, and fast acting.

One other issue with keeping the Control Plunger is if you want to move it quickly like between shifts if it is an older FD, control pressure will spike as you try to advance the plunger. Same with closing it, there will be a level of neg pressure behind it keeping it from moving quickly.

It really would not be hard to make a manifold to occupy the space of the 17mm control plunger that would tap into the supply pressure and feed the metering ports.

Somthing like this:

http://forums.pelicanparts.com/uploa...1285452116.jpg

Just a bump for this thread.
A great read for the new guys like myself.