Keeping coolant and transmission temps under control when towing in the summer heat

[Doubeleive]

I think 20° warmer is about perfect. In front of the radiator, that cooler overcools the transmission fluid, in my opinion. I would bet that you will still never see anything close to 230 even pulling a camper up a big ol’ hill.

uuh, you haven't seen me drive lol

 

[alpha_omega]

I was trying to find out which fan design moves more air, all I could find is that 3 blade house fans move more air than 5 blade house fans. I found a used oem dual 5 blade 700w fan for $89 and ordered it, I am going to put it on and compare the cfm to the 7/9 rimmed 700w I have now. I am also wondering at what point the fans cut-off due to speed/movement and if they are even commanded on if your temp goes above a certain deg while driving saying 90mph or if it would even help move more air? and if so if the fans could be commanded on in the tune. Might go with the mishimoto also I really don't like the idea of having the tru cool down below just putting around town it seems to be running about 20 degree's warmer than it was up above which is not a problem but I don't know what it's going to do when I really work it up a big hill.

Living where I do, I have a feeling some critter would ruin my good work and cost me a new cooler. This is the main reason behind not wanting to move mine down below. Plus I have a different grille than the stock one you guys are running, so I may have a bit more airflow on my Denali.
I’m wondering that even with a fan, how much heat from the road, tires, engine, trans…etc you are getting with it mounted down there. It might be more than you realize, and the cooler+fan are large enough to compensate for it.

Don't forget that if the supply side of the fan is blocked it won't blow as much air out the other side.

Probably best to test each fan in free air, before being installed behind a radiator, etc. This way, any restricted flow from blocked, clogged, or bent/mushed fins is taken out of the equation.

You’re thinking about this all wrong. While he could test the cfm for BOTH unrestricted, neither of those numbers mean jack diddly when it comes to cfm while mounted in the vehicle. By that I mean a 3 blade could move more unrestricted air all day vs. the 5 or 7 blade, but put inside a box inside a vehicle with a rad, cooler, bumper, grille - things might be different.
Yes it would be good for the statistical data to have a known zero point, but that’s all.
Additionally, you will want to make sure your fins are straight, clean and providing adequate airflow. This may mean a parked idle and running the vehicle at 25, 50, 75mph. But how that’s only possible if your cfm reader has a long cable or Bluetooth. A caveat on that is whether the cfm is then coming from the fan or the road and is one helping the other?
Hopefully all of that made some kind of sense. My thoughts and the physics behind them move much faster than my fingers do…even more so than my mouth. I usually end up sounding like a monkey f*€k**g a football bat if I don’t have time to get all of my thoughts formed into words.

 

[gooffeyguy]

Living where I do, I have a feeling some critter would ruin my good work and cost me a new cooler. This is the main reason behind not wanting to move mine down below. Plus I have a different grille than the stock one you guys are running, so I may have a bit more airflow on my Denali.
I’m wondering that even with a fan, how much heat from the road, tires, engine, trans…etc you are getting with it mounted down there. It might be more than you realize, and the cooler+fan are large enough to compensate for it.


You’re thinking about this all wrong. While he could test the cfm for BOTH unrestricted, neither of those numbers mean jack diddly when it comes to cfm while mounted in the vehicle. By that I mean a 3 blade could move more unrestricted air all day vs. the 5 or 7 blade, but put inside a box inside a vehicle with a rad, cooler, bumper, grille - things might be different.
Yes it would be good for the statistical data to have a known zero point, but that’s all.
Additionally, you will want to make sure your fins are straight, clean and providing adequate airflow. This may mean a parked idle and running the vehicle at 25, 50, 75mph. But how that’s only possible if your cfm reader has a long cable or Bluetooth. A caveat on that is whether the cfm is then coming from the fan or the road and is one helping the other?
Hopefully all of that made some kind of sense. My thoughts and the physics behind them move much faster than my fingers do…even more so than my mouth. I usually end up sounding like a monkey f*€k**g a football bat if I don’t have time to get all of my thoughts formed into words.

Yeah, having them installed will make a difference in the airflow. I was just pointing out that if he wanted to do just a comparison between the different blades and motors to see which combos have the potential to blow the most air, do it that way. Everyone's radiators and condensers will be different. Some will have mushed fins, some will be filled with bugs, some won't have the flaps of rubber along the sides to help direct the air to it, etc.

 

[gooffeyguy]

Also, @Doubeleive, I think to get a more accurate reading from these anemometers the square footage of the fan blade area should be entered instead of 10.76. So for instance, if the blades ar 19" diameter than the square feet figure is 1.969

 

[Doubeleive]

took her out to stretch her legs a little, hit a 1,368ft elevation pass, 90deg ambient and working it about 90mph the trans hit 208
flat-landing at basically 0 elevation took her up to 138mph trans stayed around 187 but I ran out of runway so I didn't get to do a extended run

 

[mikeyss]

Maybe someone should modify one of these to work in our style...haha

 

[Geotrash]

took her out to stretch her legs a little, hit a 1,368ft elevation pass, 90deg ambient and working it about 90mph the trans hit 208
flat-landing at basically 0 elevation took her up to 138mph trans stayed around 187 but I ran out of runway so I didn't get to do a extended run

Nothing wrong with that at all.

 

[Doubeleive]

Nothing wrong with that at all.

I just need a big hill to be satisfied, big difference between 1300ft and 8000ft

 

[alpha_omega]

Holy sheep $hit. I don’t think I’ve pushed mine over 98mph. Which is sad considering I’m running a 6.2l.

took her out to stretch her legs a little, hit a 1,368ft elevation pass, 90deg ambient and working it about 90mph the trans hit 208
flat-landing at basically 0 elevation took her up to 138mph trans stayed around 187 but I ran out of runway so I didn't get to do a extended run

Maybe someone should modify one of these to work in our style...haha

You’re thinking outside the box, but why stop at three? Four would make things a little more even down there. Haha.

 

[Doubeleive]

Holy sheep $hit. I don’t think I’ve pushed mine over 98mph. Which is sad considering I’m running a 6.2l.




You’re thinking outside the box, but why stop at three? Four would make things a little more even down there. Haha.

there is no room, so unless you stacked them with reversing motors it won't work