rrolsbe
Well-known member
From what I have read, the intercooler on the the 2009+ JSW Diesel is sandwiched between the radiator and AC condenser and is basically the same height and width. On other VW Diesels the intercooler is not mounted between these two heat exchangers and has its own separate grille vents to cool the intercooler. So my questions are:
Is what I stated above correct?
Are the three heat exchangers mounted radiator front of car then intercooler middle and finally AC condenser rear? If so, maybe the car would get to normal operating temps quicker if the radiator where behind the other two? but might have the reverse problem and not cool enough at high ambient air temps?
Blocking off the grille vents that cool the radiator/AC condenser on the VW Diesel's, that do NOT have the intercooler sandwiched between the other two heat exchangers, should not effect the intercooler cooling: likewise, blocking off the grill vents on our 2011 JSW Diesel would affect the intercooler cooling? Good/Bad? less efficient turbo wise?
From what I have read, the cooler the air at the outlet on the intercooler the better (may not be if you are forcing VERY cold air into the intercooler heat exchanger)?. Some people even mount spray units that spray into the intercooler heat exchanger to cool the air further. That said, if the intercooler heat exchanger were in very front would it cool turbo air better especially when blocking off the cooling vents with pipe insulation in cold weather?
I am sure the engineers have taken all of what I have stated above into account during the engineering of the car; however, since I have blocked off all but one of the lower grille vents but NOT the vent in the hood for the winter, I need to understand both the pluses and minus of doing so.
Note: Here is a data point on engine warm up time with all but one of the lower vents blocked.. This past Sunday I drove back from our mountain property. Car had set out all night and the air temp was around freezing. The first three miles has some ups and downs but the car temp gauge was still pegged at its lowest reading. The next few miles was level to slightly uphill. After these few miles the temp was about half way to normal operating temp. The next seven miles is mostly downhill and the temp actually dropped somewhat. The last seven miles had some uphill sections and the car finally reached and maintained normal operating temperature. Since the temp reading is being controlled by one of the ECU's and not directly reading the coolant temp, who knows what the actual coolant temp actually was. All I can say for sure is my average fuel milege for the 20 mile return trip, according to the computer, was about 16MPG less than it is during warmer weather (70MPG versus 86MPG) Since the car is normally garaged in town the outbound average consumption is always around 36MPG (mostly uphill).
Thanks for taking the time to read my post!
Comments welcome!!
Regards, Ron
Is what I stated above correct?
Are the three heat exchangers mounted radiator front of car then intercooler middle and finally AC condenser rear? If so, maybe the car would get to normal operating temps quicker if the radiator where behind the other two? but might have the reverse problem and not cool enough at high ambient air temps?
Blocking off the grille vents that cool the radiator/AC condenser on the VW Diesel's, that do NOT have the intercooler sandwiched between the other two heat exchangers, should not effect the intercooler cooling: likewise, blocking off the grill vents on our 2011 JSW Diesel would affect the intercooler cooling? Good/Bad? less efficient turbo wise?
From what I have read, the cooler the air at the outlet on the intercooler the better (may not be if you are forcing VERY cold air into the intercooler heat exchanger)?. Some people even mount spray units that spray into the intercooler heat exchanger to cool the air further. That said, if the intercooler heat exchanger were in very front would it cool turbo air better especially when blocking off the cooling vents with pipe insulation in cold weather?
I am sure the engineers have taken all of what I have stated above into account during the engineering of the car; however, since I have blocked off all but one of the lower grille vents but NOT the vent in the hood for the winter, I need to understand both the pluses and minus of doing so.
Note: Here is a data point on engine warm up time with all but one of the lower vents blocked.. This past Sunday I drove back from our mountain property. Car had set out all night and the air temp was around freezing. The first three miles has some ups and downs but the car temp gauge was still pegged at its lowest reading. The next few miles was level to slightly uphill. After these few miles the temp was about half way to normal operating temp. The next seven miles is mostly downhill and the temp actually dropped somewhat. The last seven miles had some uphill sections and the car finally reached and maintained normal operating temperature. Since the temp reading is being controlled by one of the ECU's and not directly reading the coolant temp, who knows what the actual coolant temp actually was. All I can say for sure is my average fuel milege for the 20 mile return trip, according to the computer, was about 16MPG less than it is during warmer weather (70MPG versus 86MPG) Since the car is normally garaged in town the outbound average consumption is always around 36MPG (mostly uphill).
Thanks for taking the time to read my post!
Comments welcome!!
Regards, Ron
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