skbrdjk13

So i know the original carb with a 22r has an idle up diaphragm that ran off of a vsv. Granted there is no such thing for a weber 32/36 carb, a co worker and I thought of an idea. Rather than using a gm idle up solenoid, I dug up one of my vsvs and installed it again, but instead ran one side off of intake vacuum and the other I ran off the normal advance vacuum circuit off the distributor with a T fitting. Used the original connector and wiring that was used to run the same vsv that controlled the idle up diaphragm on the original carb. so now when the a/c kicks on the switch activates and advances the timing from the ported vacuum off the distributor. After adjusting the a/c amplifier the a/c stays on at idle, not the smoothest idle but it stays on and keeps the cab cool without having to keep my foot on the gas at a stop light. Told 22reperformance about it and said it was a terrible idea. Anyone else have any input on this idea? Uploaded 3 pics. I do have a separate idle advance circuit running from the intake to the other port on the distributor btw.

vsv with original wiring and connector that the a/c clutch goes to.


to the left of the pic theres the original vacuum fitting running intake vacuum to the vcv and the other end going to the T fitting connected to the normal advance from the distributor

old87yota

I agree with 22RE Performance. This is a bad idea.

It seems like you are confusing idle up (increasing engine speed) with ignition timing. They are not the same.

The original idle up vacuum circuit opened the throttle a bit with a diaphragm when the A/C was turned on so that the engine speed would not get too low with the load of the A/C compressor at idle.

Your setup doesn't open the throttle; it just messing with the ignition timing, which isn't good for your engine.

skbrdjk13

Sorry for the late reply, but well ˟˟˟˟, seemed to work pretty well, but apart of me knew it was too good to be true, idle up solenoid it is