Powerdyne Messes With Climate Control

[performancenut]

OK- the forced induction is messing with my climate control system. Under boost, it shuts off the AC (usually a good thing) but messes with the flaps and channels hot air. Anybody have this problem? Fix with a vacuum cannister? Where did you T the cannister in at? I'd rather not reinvent the wheel if someone is willing to share their fix. Thanks!

 

[BeauJ]

At WOT, you a/c has a switch to cut off even without the s/c. I haven't had this problem either. It switches the compressor off under a load so it doesn't take away power. I'm not sure if a canister would help though.

 

[performancenut]

Obviously, too much vacuum canister effect when under boost could lean out the system by not allowing the FPR to do it's job. Poof. So, my thought is to put a cannister in line with the climate control system. The HCV (heater control valve) loses it's vacuum effect under boost and lets hot coolant pass through the heater box. I temporarily stopped this by a nylon tie on the valve during the summer. However, the mornings are going to be a little cool here pretty soon. So this is not a permanent option. Anyone experience this problem on a supercharged X?

 

[BeauJ]

Ahh, makes sense now. I would tee the vacuum canister in at vacuum hose that goes in the bottom on the upper intake.

 

[jah81592]

I agree completely with BeauJ at WOT all factory cars shut the ac compressor off for power. The sohc doesn't have the problem under boost that you are stating but on the sts turboed setup they have a pcv solenoid which vents a small amount of boost to the atmosphere (just enough to keep your accessories from doing crazy stuff under boost but not enough to affect or loose overall boost and also to keep from blowing oil out the cam/valve covers,vent hoses,it basically doesn't let the crankcase become pressurized) but I am not sure if this will solve your problem;I am only offering what another manufacturer is doing. The only problem with a vacuum canister would be under boost there is no vacuum so even with a canister there would be a transition from vacuum to pressure. But to support what you are saying is I think you could keep vacuum in the canister but before the canister(supply side) install a check valve so your canister will hold vacuum under boost and not become pressurized still giving you the nagging problem you are having. Of course not too familiar with vac canisters so they may already have this feature built in. I believe I would install inline before the valve\vac solenoid\vac motor giving you problems. The bad thing about modding is all the damn unforseens, who in the hell would have ever thought of a heater\vent prob when adding forced induction. Keep me posted of the outcome and keep up the excellent threads!!! Maybe we can all put our heads together and solve this problem.