R-134-A Conversions/Poor ACC Performance

[Randy]

HI, I, too, am dissappointed with the performance of my ACC (1986 420 SEL) after the conversion. I understand the condenser performance is part of the problem; I looked, and don't think I can get a larger condenser in there. If there is a replacement/upgrade condenser that will make the system work, I iwll buy it (I have to be convinced it will actually work, and not just help someone send their kid to college). What about adding condenser by plumbing in some finned condenser tubing like the Spine-Fin stuff GE uses in their A/C units? It would fit nicely behind the grill in the plastic bumper cover, at least 1-2 passes about 3 feet each.
Ultimately, I am probably going to convert mine back to R-12; I hate to make excuses to passengers for the poor performance; it's embarrasing.

R12 prices are going down. I bought it for $14.06 per pound delivered to my door. There is just no reason to convert a system anymore, especially with 134 prices hitting $8 and more this summer.

It would cost less to flush, change r/d, put in fresh amount of mineral oil, evacuate and recharge than to increase the condensor size or put in a parallel flow.

Good luck,

[pwogaman]

Larry - just where are you buying your R-12?

[jgl1]

1991 350 SDL (USA) was factory equipped with R-12 and a cross flow condenser. This condenser is still available from M-B and will work with either R-12 or R-134a. Installing it in your '86 420 will require minimal modication; functional dual auxiliary fans are necessary for maximum cooling.

I think the name of the outfit is www.refrigerantsales.com. They are in Colorado.

Good luck,

[autozen]

I concur. I'm paying $12.85/lb, and I'm sticking with R12. My Robinair recharging station makes the job so easy.

Peter