What pressures are you guys getting with either R12 or 134a?

Thanks

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD

What outside temp? Fan speed? Humidity?

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

TXV pressures are going to be different than your OT frankensystems, but most are going to be in the 40/200 range

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Thanks, I was wondering about a stock TXV/R4 system that was working hard.

I'm mainly concerned with what kind of high side pressures one would see with a 134a conversion.

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD

When my SDL was on R134a and the AC was running on any kind of warm day the electric radiator fans would kick on almost right away. The switch on my car clicks on at 250 PSI.

I'm running an alternate refrigerant now, with the fan on mid speed the pressures are 27 / 190 (at ~1100 RPM, with the electric radiator fans running. The high side got up to 250 then the fans kicked on, and stayed on until the compressor cycled). I thought that was a bit low, but the suction line gets nice and cold so we'll see how it works once things get really hot out.

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Thanks. I'm just trying to get an idea about what would be too high and what would be ideal.

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD

I'd venture that over 280 with the aux fan running is too high.


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__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.