anyone have any recommendations for alternate A/C fans?

[rakkasan]

Back ground: Jays (Suprahero) car and mine are virtually identical. My car's A/C hasn't worked since my 1J swap back in early '07.

After talking with Jay about his A/C, he told me that when he runs his it causes his car to run hot. Neither of us have the factory A/C fans installed, and with my A/C working again, I don't want mine to run hot. My wife will be driving my car on and off for the next year,and she probably won't remember to watch the temp gauge, so I want get something installed to preempt it from being a problem.

Any suggestions?

 

[rakkasan]

more specifically, I want it to operate just like the stock setup and turn on when the A/C is in use. I'm not certain how the stock fans are controlled, but I imagine that it's turned on by the ECU.

Since I use a stand alone, I was thinking about controlling it with the compressor clutch. When it engages, it turns the fan on as well. Sound logical?

 

[adampecush]

Do you have an upgraded radiator in the car?

 

[rakkasan]

Do you have an upgraded radiator in the car?

Yes, I have a KOYO. The problem is Jay has one as well and his car began to overheat when he ran his A/C. He turned it off, the temp went down.....

 

[adampecush]

have you considered getting the A/T pusher fan? I now am.

(this now worries me, as I figured the upgraded rad would be OK with AC)

 

[Zumtizzle]

Said A/C Pusher Fan is Climate Based.

That said fan is climate based.

All my California Supras had it and were manual.

My Oregon Supra was automatic and didn't have it.

But yea rakkasan install a stock pusher fan in that spot with a temp sensor and stand alone spal type fan control set at like 185.

 

[tissimo]

What fan do you have in the car?

My buddy has the stock radiator with the hydro fan it runs fine even with 90* fl weather. My old 2jz with a stock radiator and fal fans was ok.. temps got to 210-220( was still rising though) on the highway with the a/c on full blast.. on 75-78 (where a/c would shut off every once in a while) was perfectly fine.

My buddys car has a watercooled gt35r and my car had stock twins (watercooled turbos).

My buddys car read ~ 210-220 on the highway but the temp sensor is right where the turbo water comes into the waterneck so might be throwing those numbers (stock gauge was at the 4 oclock pos).

My car was using AEM / stock sensor to read and stock gauge was rising with a/c at full blast on the highway.

Both had 4" cored Intercoolers in front of the radiator.

 

[grimreaper]

the two stock pullers on the driver side have been adequate except on the 105+ days when i was in bumper to bumper traffic for 30+ minutes. in those situations i saw 210 with aftermarket water temp gauge. Sometimes a bit higher but the car began to shut things off (ac) and temps drop.

other wise my system settles right at 195-198 with ac on and moving with mostly stop and go traffic. no ac= 190 or so sitting, 185 moving. I added a pusher (12" "800"cfm) and didnt even notice a difference in temps when the fuse blew on it

are the undercovers in place?

 

[Who]

more specifically, I want it to operate just like the stock setup and turn on when the A/C is in use. I'm not certain how the stock fans are controlled, but I imagine that it's turned on by the ECU.

Since I use a stand alone, I was thinking about controlling it with the compressor clutch. When it engages, it turns the fan on as well. Sound logical?

The condenser fans are operated by the ac high pressure switch and by a water temp sensor on the thermostat housing. See the attachments.

In my opinion and in conversations with a AC shop mechanic, the condenser fans in our cars are a necessary evil. If Toyota engineers put them in than they are necessary. The shape of our cars and the size of our rads and condensers don't give us much surface area vs a Ford F150 or a SUV. If you don't have condenser fans you can build up a lot of heat on your condenser which makes your ac inefficient and blow warm in stop and go traffic. High pressures make your compressor work harder and puts an extra load on your engine as well. As your condenser becomes heat soaked your water pump fan sucks hotter and hotter air from your condenser and across your rad transferring the heat to your cooling system. The fan clutch starts to engage as well and places even more load on your engine. You could also go into a AC over pressure situation and your dual pressure switch will shut down your compressor until the pressures fall in between the normal ranges.

Could you run your condenser fans to much and bring the pressures down to low in the ac system by using a relay off of the magnetic clutch? Probably not depending on the climate you live in. Certainly not in Florida. By the way all of the above applies to city driving in stop and go traffic. If you are running hot when you run the ac cruising at highway speeds you might have another issue.