Aftermarket condenser issues
04-19-2012, 10:59 PM
#16
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The more heat you extract from the AC condenser by making it more efficient - the worse it will be - its really simple - you are just adding more heat to the air before the radiator.
In the end its just more heat going into whole system - so the whole system needs to take more heat out.
Unless you have some clever way of getting that heat away from the radiator its all just cumulative.
Alan
In the end its just more heat going into whole system - so the whole system needs to take more heat out.
Unless you have some clever way of getting that heat away from the radiator its all just cumulative.
Alan
04-20-2012, 10:33 AM
#17
Race Car
+1. A more efficient condenser will extract more heat faster from the refrigerant when the A/C is on. That extra heat will be pushed/pulled right into the radiator.
Dan
'91 928GT S/C
475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft
04-20-2012, 11:57 AM
#18
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Your R143a pressure issues - likely indicate insufficient condenser airflow when the pressure is high - since you are presumably measuring it at idle - you need to at least get your full fan set-up on and perhaps model the hood closed - cover over rad area...
You need to ensure all your fans stay on all the time when the AC is on - as is the case with the stock set-up. You probably also need a low/high refrigerant pressure (clutch drop out) switch as is stock on R134a systems or you can shred your compressor belt if the system overpressures - else you can blow things up this way - the high pressure switch stock is set to go off at 32 bar (calculate the psi on that!).
Anyway do get the AC working well - you need it - but this will only make your cooling issues worse. I think you need to focus on flow - make sure your fans are really adequate and that they guide all the air through with no possible recirculation paths - funnel air to the rad (esp the AC condenser)
If you have no effective rad shrouding - that is a big issue. You may be better off completely sealing off the area of the SC obstruction in order to ensure full fan suction on the rest of the area... 4 small fans attached direct to the rad face is probably not sufficient - funnel them for the full possible area.
How much does the SC block flow through the AC condenser? That may be part of your AC issue - bigger condenser/rad spacing (with perimeter sealing) might help that issue.
Alan
You need to ensure all your fans stay on all the time when the AC is on - as is the case with the stock set-up. You probably also need a low/high refrigerant pressure (clutch drop out) switch as is stock on R134a systems or you can shred your compressor belt if the system overpressures - else you can blow things up this way - the high pressure switch stock is set to go off at 32 bar (calculate the psi on that!).
Anyway do get the AC working well - you need it - but this will only make your cooling issues worse. I think you need to focus on flow - make sure your fans are really adequate and that they guide all the air through with no possible recirculation paths - funnel air to the rad (esp the AC condenser)
If you have no effective rad shrouding - that is a big issue. You may be better off completely sealing off the area of the SC obstruction in order to ensure full fan suction on the rest of the area... 4 small fans attached direct to the rad face is probably not sufficient - funnel them for the full possible area.
How much does the SC block flow through the AC condenser? That may be part of your AC issue - bigger condenser/rad spacing (with perimeter sealing) might help that issue.
Alan
