radiator-fan controller, or both?

[Wkaz]

Can we just run a cooler thermostat ?

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[mwilk012]

Can we just run a cooler thermostat ?

No.

 

[GtX]

Early in my career I was measuring thermal resistance of thin films using one dimensional heat flow and couldn't understand why my chiller kept shutting down despite having plenty of capacity for the heater.

That experiment thought me a lot about heat transfer but mostly about heat capacity of thermal transfer fluids.

 

[jav_eee]

RPM Extreme fan controller is still working fantastic. For those interested; 3.6L running 5W-30 oil. Today (6-22-24) I did a lot of driving around town, all stop & go, average speed 35 mph. The outside temperature was 96 degrees, 40% humidity, a real scorcher. The highest temperature my Jeep reached was 202 degrees at a traffic light and that lasted for about 3-4 seconds. Average coolant temperature ran between 190-195 degrees. I used to see temperatures reach as high as 232-236 degrees.

only comment I have is a LOL at “a real scorcher”. But only because I’m from the devils belly button AKA Deep South Texas where we see 110°+ days way too much during the summer. But I guess 96 is hot for Virginia.

anyways, my RPM controller works just as well in our inferno down here. I see the same as you.

 

[Flip]

I apologize, I posted this in the wrong thread.

I re-posted it.

 

[Flip]

only comment I have is a LOL at “a real scorcher”. But only because I’m from the devils belly button AKA Deep South Texas where we see 110°+ days way too much during the summer. But I guess 96 is hot for Virginia.

anyways, my RPM controller works just as well in our inferno down here. I see the same as you.

I'm glad it's working out for you. Yeah, I thought 96 degrees would get snickered at by a few other states, especially Texas.

 

[Flip]

Wish I could get one, he doesn't have one for the 2.0L

Brent,

Just a thought: if the 2.0 has the same ECU as the 3.6 there is a very good chance the RPM fan controller will work. It might be worth a phone call to Jon and see what he has to say. If you're willing to try it out and it doesn't work ask Jon if he would refund you for giving it a test run on the 2.0.

 

[workky]

Ok, im really putting the ole 2.0 turbo to the test. I was pulling my little camper back from a trip down in South GA. It was right at 100 degrees outside. I was blasting the AC all the way home (3.5 hour drive ). The jeep did perfectly fine until i got right outside of Atlanta on I-20. Temp started climbing up, and didn't come down. I had to pull off the side of the road and shut it down. I ran the fan with it off for quite some time. Finally crunk it back up and eased on home with no more issues. I think this engine runs great, but under load it kind of suffers.
A bigger radiator doesn't help at all, thought about just putting my original radiator back in. Not sure if anything will help. Maybe something in the hood to vent out all the hot air, but i don't know.

Maybe im asking the little 2.0 to do too much

 

[workky]

Anyone know if hood louvers actually remove heat? Or is it just an appearance thing

 

[jav_eee]

Ok, im really putting the ole 2.0 turbo to the test. I was pulling my little camper back from a trip down in South GA. It was right at 100 degrees outside. I was blasting the AC all the way home (3.5 hour drive ). The jeep did perfectly fine until i got right outside of Atlanta on I-20. Temp started climbing up, and didn't come down. I had to pull off the side of the road and shut it down. I ran the fan with it off for quite some time. Finally crunk it back up and eased on home with no more issues. I think this engine runs great, but under load it kind of suffers.
A bigger radiator doesn't help at all, thought about just putting my original radiator back in. Not sure if anything will help. Maybe something in the hood to vent out all the hot air, but i don't know.

Maybe im asking the little 2.0 to do too much

running the fan with the vehicle off doesn't really do much. You need to be circulating that "cooler" coolant through the system.

Hood vents don't work while moving, in my experience. They do let the hot air out once you're not moving.

 

[Flip]

Ok, im really putting the ole 2.0 turbo to the test. I was pulling my little camper back from a trip down in South GA. It was right at 100 degrees outside. I was blasting the AC all the way home (3.5 hour drive ). The jeep did perfectly fine until i got right outside of Atlanta on I-20. Temp started climbing up, and didn't come down. I had to pull off the side of the road and shut it down. I ran the fan with it off for quite some time. Finally crunk it back up and eased on home with no more issues. I think this engine runs great, but under load it kind of suffers.
A bigger radiator doesn't help at all, thought about just putting my original radiator back in. Not sure if anything will help. Maybe something in the hood to vent out all the hot air, but i don't know.

Maybe im asking the little 2.0 to do too much

I could be wrong but I thought someone had recently posted Rpm extreme now offers the fan controller for the 2.0 ?

 

[AZJeepGuy]

Yesterday I was out wheelin' all day wit no issues with heat. On the way home I had to climb a few grades and my temps hit 240. I was driving 65-70 keeping up with traffic. Not pulling anything, just myself a a bit of gear for the day. When I slowed to 60 the temps came back down but this really made me nervous. I've gone ups this hills 100 times in different vehicles and no issues.
Is it possible to change the fan speeds with a code reader of some sort?

 

[jpribe]

running the fan with the vehicle off doesn't really do much. You need to be circulating that "cooler" coolant through the system.

Hood vents don't work while moving, in my experience. They do let the hot air out once you're not moving.

Just for fun I had tied some bright thread into my Rubicon hood vents. There was flow out of the vents while driving.

 

[jav_eee]

Just for fun I had tied some bright thread into my Rubicon hood vents. There was flow out of the vents while driving.

I don’t feel much hot air coming out when my engine is running and the fan is on so I assumed it was similar while the vehicle was moving. I still vented mine to shed underhood heat faster to try and prolong the life of the underwood plastics.

 

[jpribe]

I don’t feel much hot air coming out when my engine is running and the fan is on so I assumed it was similar while the vehicle was moving. I still vented mine to shed underhood heat faster to try and prolong the life of the underwood plastics.

You get the pressure from the air coming in through the radiator plus a bit of negative pressure from air flowing over the hood and pulling air up through the vents. It isn't a lot, nothing like the louvers I had put on my TJ. But now you've got me thinking.

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