A/C Update

[Hugh R]

Posted before on this, I had a weird aftermarket a/c system with a Seiko compressor, a turbo type decklid condensor (very small about 18" square on the right side of the decklid not influenced by the engine fan, and a Kuehl type left rear condensor with fan. Put in a real 911 decklid condensor, kept the Kuehl-type unit, added a stock front condensor (haven't put in the front condensor fan yet) and took the 18" square one mentioned above and put it under the car as a passive underbelly unit. All that and 8 hoses later and 4 pounds of R134a with appropriate valves, and a real 911 evaporator fan coupled onto the aftermarket evaporator box, which is different than a pcar evaporator box, but the holes for the return air were already cut in the bulk head (the weird system has one elongated slot in the passenger footwell versus the genuine system which appears to have two return air holes). Anyway, today at 96 degrees F with typical LA traffic, I'm getting 38 degree air and an OK but not great amount of air flow. Don't know about yours, buy with my a/c on, I get flow out of the dash vents, and I can direct or change flow out of the underdash and windshield vents with the air (middle) control on the dash. I believe most 911s don't do this, mine is a weird grey market car, and I don't have the bowtie thingie on the plenum.

My advise, buy hose and fitting and don't have them crimped until your sure of the fit, then take them out and have them crimped. Not a particularly hard job.

Bought a gallon of denatured alcohol to flush the condensors, it evaporates and doesn't leave a film, you wouldn't believe the crap that came out of those condensors.

My cost: Front condensor, $75, but leaked-I don't believe it was the sellers fault, I think I bugged it up, thanks TonyG for another one, rear condensor-Free from this site, front evaporator fan-free from this site, front condensor fan-free also, but haven't installed yet. Receiver drier $27, high/low cutoff switch for R/D $13, hoses with ends about $300. Freon R134a - 4 cans at $5.00 each. Compressor oil $6.00 in a can that you suck in while its under vacuum. Vacuum pump and gauges thanks TonyG from this site for the assist. BTW, I was going to put in a Jim Sims subcooler, but while doing the vacuum check, a braze joint leaked, so we eliminated it. I may put it in if I ever pull the system apart again in the future. Most of my components are o-rings, and a few are flange fittings.

BTW, TonyG told me when he bought his SC, it was low on freon R-12, he added R134a and is getting acceptably cold air.