Thanks for the always very informed responses to my questions William

I am running the regulator screw backed out so far im afraid that if I back it out any more it will fall out of the socket [X(] My FA-150S GK has a velocity stack, and is still gulping fuel like an old american car [sm=drowning.gif] I am able to adjust the low speed screw for max RPM at low idle, and it maintains it pretty well... But its just so sensitive that like turning the screw a even couple degrees one way or the other results in the engine not being able to idle. Its so incredibly sensitive that I have to try not to breathe while just turning it an inperceptable amount [sm=surprised.gif]

I have the high speed very rich for break in still, but it is not overly sensitive, maybe 1/4 turn before it makes much of a difference at full throttle... So that seems pretty normal...

My regulator setup is as follows: Crank vent goes through 1/4 inch tube straight to T fitting. Bottom of T fitting is open to atmosphere... The through side of the T goes through 4 inches of the supplied hose to the VP-30 pressure input. You can see it in the attached picture and also the backed out regulator screw [sm=cool.gif]

Your observation about the VP-20 is exactly what I was thinking. I will buy another VP-30 for my FA-82