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Re: Details: pressures, temperatures, and observations Posted by JerseySaab [Email] (#666) [Profile/Gallery] (more from JerseySaab) on Sat, 25 Jun 2011 20:34:12 In Reply to: Re: Details: pressures, temperatures, and observations, marvinstockman, Sat, 25 Jun 2011 18:44:40 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I don't think it's the flap(s), since placing the thermometer right next to the evaporator (where the cabin air filter goes) yields the same result, but I'll recheck that.
I've done several EnviroSafe/Duracool conversions on older vehicles and am not used to seeing head pressure that high. (One of the selling points of this type of refrigerant is that it is supposed to work at lower pressure.) Seeing the dial soaring to 300+ psi at 1500 RPM I was concerned about how high it would ultimately go. I'm a bit gun shy here having managed to blow out a pressure relief valve on another vehicle once due to accidental overcharging. I take it then that this system will cut out, rather than blow out, if pressure gets too high?
Previously with R134 under similar conditions the high side was running at about 275 psi. What kind of pressures are others seeing in these systems using HC refrigerants? This is the first R134 system I've dealt with, the others were all originally R12.
The low pressure return line is cool but not really cold, not even cold enough for condensation to form. The high pressure inlet line is hot to the touch.
I can easily charge back in some more refrigerant to try finding the "sweet spot" if necessary, have plenty of the stuff on hand to experiment with.
posted by 68.39.165...
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