2015 Q50 Can it run cooler? - Infiniti Q50 Forum
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post #1 of 16 (permalink) Old 06-02-2019, 05:46 PM Thread Starter
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Default 2015 Q50 Can it run cooler?

I知 in Houston and I work out of my car. I知 in it 8 hours a day and sitting stationary at job sites for hours at a time. The car is not over heating but runs hot enough that the AC starts to blow warm air. I have read the TSB痴 and the forum posts on this and similar issues. I will get those addressed by the dealership. My question is this, can we swap radiators or anything to allow the engine to run cooler overall? I知 sitting here with a water hose propped up so that it sprays into the grill and the hood is up. This works great....

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post #2 of 16 (permalink) Old 06-02-2019, 08:21 PM
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I would think a good radiator shop or air conditioning facility would be able to help with this...a specialty shop that can fabricate needed parts. I would think a city the size of Houston would have a shop capable of this. Probably won't be cheap as custom work never is, but that is where I would start. Hopefully you are in a white car with proper window tint.

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post #3 of 16 (permalink) Old 06-02-2019, 10:24 PM
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Won't a larger capacity radiator just mean it will take slightly longer for it to reach the same temperature it is now?

The built up heat needs to be carried away..that's the function of a radiator, sure, but it needs airflow in order to work.

My thinking would be that additional airflow would be what's needed.
A larger existing or additional fan that pulls more cfm.
No idea if there is room for either.

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post #4 of 16 (permalink) Old 06-03-2019, 12:50 PM
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Won't a larger capacity radiator just mean it will take slightly longer for it to reach the same temperature it is now?

The built up heat needs to be carried away..that's the function of a radiator, sure, but it needs airflow in order to work.

My thinking would be that additional airflow would be what's needed.
A larger existing or additional fan that pulls more cfm.
No idea if there is room for either.
Depends on what you mean by "capacity". If you are referring to the amount of tube-side coolant, then I think your statement is correct.

If a larger capacity heat exchanger means additional surface area and/or design change then that's different.

The basic design calculation for a heat exchanger (there's actually a lot more to the calculation but for simplicity's sake) is:

Q=U x A x LMTD, where Q is the amount of heat transfer, U is the heat transfer coefficient, A is the heat transfer surface area and LMTD is the log mean temperature differential.

So the amount of heat transfer is directly related to the heat transfer surface area (A) and the design of the heat exchanger (U).

A larger radiator with more heat transfer surface area (A) and/or a different design that increases the radiator's heat transfer coefficient (U) will increase the amount of heat transfer and reduce the temperature of the coolant. Increasing the flow of air across the radiator could help but the impact is minimal because of the heat capacity of air is low.

Of course, the OP could always tow a trailer with a tank of water and spray water on the radiator. Water's heat capacity is 4 times greater than air and you also get the heat of vaporization working in your favor. Probably not very convenient though.

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post #5 of 16 (permalink) Old 06-03-2019, 04:54 PM
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Would a larger condenser for the A/C help matters any? I suspect any or all solutions that involve a larger heat exchanger (radiator or condenser) are going to be hard to accomplish due to space constrictions in the nose of the car. Different fans to move more air might be the answer. But wtf do I know?

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post #6 of 16 (permalink) Old 06-04-2019, 09:01 AM
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My vote is for more air flow. How can you go wrong? It cools OK going down the road. Right?

Cut some louvers in the hood. My nephew did just that on his 500+ HP Honda S2000. Worked!

OK, I might be a little facetious about cutting up the hood but how about cracking it open when idling for extended periods? I see squad cars do that all of the time in the summer.

EDIT

I should read more carefully. I see the OP has opened the hood already and it seems to help.

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post #7 of 16 (permalink) Old 06-04-2019, 10:48 AM
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Is there AC power at the site(s) where you park? Put one of these in front of your car while idling.
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Last edited by Pillboy; 06-04-2019 at 01:05 PM.
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post #8 of 16 (permalink) Old 06-04-2019, 11:38 AM
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Is their AC power at the site(s) where you park? Put one of these in front of your car while idling.
While probably effective not very practical. You may need a looooong extension cord.
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post #9 of 16 (permalink) Old 06-04-2019, 12:27 PM
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You may need a looooong extension cord.

he壇 also need to pick a different color as red / black might not be a good match with his car paint code

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post #10 of 16 (permalink) Old 06-11-2019, 02:24 PM
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Why is this thread in the In Touch forum.... and, now that I think about it, why is the forum titled In Touch and not InTouch??

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