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#16
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#17
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I'm no expert but common sense makes me wonder...
If R134A is less efficient, cools less, takes longer to get cool and runs with higher pressures (works harder), does it not in fact require more energy (fuel) to operate?
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2012 E350 2006 Callaway SC560 |
#18
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bingo[but dupont doesn't care about that.their patent had run out on r12 so they got the gov's and scientists together to push their agenda and sell a new refrig.does it work as well? who cares does it make more money for dupont than letting everybodyelse make r12 without paying royalties? YOU BET]
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#19
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You can lower the cut-in of the termistor range of the collant temp sensor by bridging it with a parellel resistor..this gets you a 100C cut-in of high fans [ instead of 105/107 spec.] when the a/c condensers passive heat starts to effect coolant temps [ which it always does with the cond in front of radiator]..this is a $2 modification that we have been using for years. The other is many use a cabin sw that shorts the high pressure sw manually..this is nice if you want to get a jump on temp creep-ups at will. Good as a high temp saftey measure , regardless of using the a/c or not..great if towing, etc.. This also allows for normal operation when not being used b/c it does not change any of the circuits stock design. { Had to throw that in there before I get jumped on that one..] Also, you can jumper the R15 dropping resistor to get high fan instead of low for a/c operation ..this does require running a heavier wire back to the low fan relay as the original will not carry the higher amp load of high fan [ you will notice high fan and low fan have different size wires , as low fan does not have the high amp draw of high fan, due to more resistance in that circuit from R15.} And lastly, don't make your coolant ratio on the high % range...water transfers the heat away lots faster than anti-freeze does ..40/60-h2o is fine in temperate climates.. These are just simple , short $$$ mods and are not for the adverage owner .. but more geared to those of us who are tech inclined and know these circuits.[disclaimer] High side temp/pressure checking and air flow has a lot to do with getting high output out of an a/c unit, regardless of what the refrigerant is.. and the main reason manifold condensers are so popular in beefy a/c systems......... Last edited by Arthur Dalton; 05-17-2007 at 03:05 PM. |
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