Re: r134a numbers with stock Condenser & replacement POA
New Update -
I replaced my heater control valve with a NOS GM, made in USA, heater control valve with the "bottle cap" seal that I bought on ebay. I tested it before installing it, and at 4 - 5 in hg., it completely blocks all passage of air or water.
I installed this valve, and used high density foam to seal the bottom of the condenser. I also added a reproduction rubber evaporator drain, mine was missing.
I re-did the placement and wrapping of my expansion valve bulb temperature sensor. I found this old 1968 GM stock photo, attached below, and my bulb is exactly the same, so, I set mine up exactly like that with two small hose clamps and only wrapped the part overlapping the suction line.
It has cooled off here. It was 75 deg. today and sunny. I went for a ride and the best I got was 29 deg. out of the center vent on max. high. at cruise. Mostly, center vent temp hovered around 31 deg. at max. hight, and idle was great - stabilizing around 37 degrees after about 3 min. on max high. It seems the system is working very good and the POA is also set correctly. The components seem top notch.
I think the only debate is my peanut sized compressor - Sanden SD7B10. I think it works fine in all conditions, but, in 105 degree heat, at idle, you would probably do better with a bigger compressor on the big stock Chevelle system. In my case, I prefer the compressor down low and not part of the showcase, so, that necessitates this small compressor, and I am happy with the cooling.
1970 Chevelle SS396 (408), Fathom Blue,
Original Block & Forged Crank, KB Pistons, Edelbrock 6045 Heads,Comp Cam 292H, March Serpentine, RPM AirGap,750HP,100hp Nitrous
A/F Wideband,Tremec TKO 600, 12 bolt,
30 spline Moser Axles, Richmond 3:73's, Hotchkis control arms, swaybars, springs, Wilwood 12" rotors D/S, 4 piston calipers