Went & purchased the A/C Delco air-conditioning pressure switch(cycling switch)#22664328, that is required for the LS1 3-prong A/C plug. Went to thread it on my accumulator & the switch has too small a threads to thread on. Anyone know the cure?Gar
Went & purchased the A/C Delco air-conditioning pressure switch(cycling switch)#22664328, that is required for the LS1 3-prong A/C plug. Went to thread it on my accumulator & the switch has too small a threads to thread on. Anyone know the cure?
Yes, and it's not easy. The thread from the LS1 is 12mm if I remember correctly. I ran a die nut over the original threads on the drier and machined a chamfer on the pressure switch for the o-ring to seal. The other option is to weld a 12mm tap in the suction line somewhere. You won't find a drier with the the threads you need unless you go to the new LS1 style. Been there done that.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
Actually that switch goes on the high pressure side. I used my orignal port for the old R12 high side and it worked great.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
Three prong? Wow, my switch only has two. It's inline with the compressor clutch and is also mounted on the high pressure line. If there is too little pressure, no current. Too much pressure, no current. If in the sweet spot, sheer exstasy in the cab.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
The LS1 switch acts as a high and low pressure switch and was screwed into the drier when I received the motor and tranny. It doesn't work worth a crap on the high side. I kept popping the valve on the back of the compressor instead of the switch taking it out like it should. The 3 wire switch will take the compressor out between 28 and 30 psi. I just went through this and finally got my pressures right.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
The switch I have is trinary, goes both ways ( low pressure and high pressure ) and is all done with two wires.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Wish I would have gone that way. How does the PCM control it? That was my problem, I wanted it to all work like a factory F-body.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
PCM just turns the compressor on and it pumps until too much head pressure is produced and then shuts off. Never shuts off in my truck since I have the dual fans running at max at all times and that keeps the head pressure down and the cab ice cold. If it runs low on freon the switch will break the circuit to preserve the compressor. Found that out when one of the aluminum fittings broke. Had the fitting replaced with steel and no more worries.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
I'm good for now but I'd like to take a look at yours if I decide to switch to a different drier.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
Do you have an R12 fitting somewhere inline on the high side? If not, you'd have to get one brazed on there or splice in a fitting inline. I had mine spliced since I didn't want to wait up to a week for them to get the correct fitting. Mine is on the hose coming from the condensor. My 92 truck had one built in there but this 93 doesnt?
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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