Year: 90
Make: Chevy
Model: Suburban
Engine Size: 5.7
Refrigerant Type: r-134a
Country of Origin: United States
I just recently read that if, in a conversion, you use a true PF condenser, then you can charge the system to the same weight as the r-12 was. Is this true? Reason I ask is that I am using a true PF in my conversion, and I've never really been able to get the right performance out of the system.
Reading back through, a lot of people have tried a lot of things to make R-134a work in those late 80s early 90s 1500 class GM trucks, and it just doesn't.
Edited: Mon June 10, 2013 at 10:44 AM by mk378
I still have one Kick A Modine 1 3/8 thick serpentine (not PF) condenser in my shop which was developed for the 5.7 Burb R-134a and tested by GM/Truck but it was toooo expensive. They tried it on 3 or 4 trucks w/ other changes and lowered the louver temp to 45 F (on recirculation) in Phoenix @ 111 F (like this week forecast). Makes the Burb into the butcher's meat wagon. My bro wants it for his Burb but he's in Colorado and doesn't really need it. It did not raise the H2O temp or have higher air restriction. Takes additional refrigerant Can charge orifice tube/accumulator A/C systems until evaporator outlet is 1 to 3 degrees colder than the inlet pipe (due to P/T relationship and evaporator refrigerant pressure drop).
Should insulate the accumulator. Keep on max or recir.
PF on Burb doesn't do Jack at idle but should help at higher compressor and road speed due to lower pressure drop.
hotrodac
-------------------------
Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy.
AMAZON.com: How To Air Condition Your Hot Rod
Edited: Mon June 10, 2013 at 4:41 PM by ice-n-tropics
You'll need 4 or 5 beer can coozies, a sharp knife, and a bunch of duct tape.
Hahahaha. Didn't even think about the fact that can coozies are basically the same thing. I've got a medium size box full of them in my shed somewhere. Thanks for the idea!
You can always size a bigger universal PF condenser. There is lots of room up front for one that is bigger and its not hard to get them there. I am currently mounting one up on my 93 in hopes of achieving good temps with r134a.
Prepper,
My 1 3/8" is up for Picker auction (w/ satisfaction guaranteed).
hotrodac
-------------------------
Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy.
AMAZON.com: How To Air Condition Your Hot Rod
Thanks Jeremy. That's pretty much what I thought, but it was from a poster on here who has always seemed knowledgeable, and respected, so I figured I'd ask. Just further proves that it seems my system does NOT like to work well with r134a.
We've updated our forums!
Click here to visit the new forum
Copyright © 2016 Arizona Mobile Air Inc.