Thermostat question

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It's a 22" radiator. The contour fan setup is for a 26" radiator. Plus the contour fan set up is almost 3.5" thick, he's only got about 2" to the power steering pump pulley.

That pulley set up seems to be a killer. If it's the underdriven set up I think it is, it really could be the source of most of this.
 
I spent some time on the CVF website, if the CVF serpentine pulleys are the same size as their V belt pulleys, they're a 10% under drive compared to stock pulleys. Did you measure the serpentine pulley diameters?

The combination of no shroud and a 10% under drive on the water pump could be causing all of your grief.
the pump pulley is 7" and the motor one is 6 1/2".
 
Is that where the belts actually sit? I suppose it doesn't matter much as long as you measured to the same place on each pulley. If that's the case those are standard drive pulleys, so that's not it.
 
It's a 22" radiator. The contour fan setup is for a 26" radiator. Plus the contour fan set up is almost 3.5" thick, he's only got about 2" to the power steering pump pulley.

That pulley set up seems to be a killer. If it's the underdriven set up I think it is, it really could be the source of most of this.

That tends to make one think that if you ran your engine 10% slower then it could overheat, but it doesn't.
There is other issue's going here.
 
That tends to make one think that if you ran your engine 10% slower then it could overheat, but it doesn't.
There is other issue's going here.

Uh, no. With underdriven pulleys the accessories turn slower for a given RPM. If you slow the engine down, you also slow down the production of heat. It's the relationship between the engine speed and the water pump speed that's important.
 
That's it.
Ok, well, my educated guess is that this is a fan that will have the free-air flow rating of 2010 cfm drop pretty badly when put in front of or behind a rad. There are a few with that type of design that flow OK but most do not. Being an inexpensive fan is another indicator that it is likely not very good; the good ones of that design cost much more. And 2010 cfm free flow is not a whole lot to start with anyway. This would explain the problem you are having.
 
Uh, no. With underdriven pulleys the accessories turn slower for a given RPM. If you slow the engine down, you also slow down the production of heat. It's the relationship between the engine speed and the water pump speed that's important.
Roger that. But, we switched to a 5.2" crank pulley and dropped the water pump speed by 15-20% and did not see any change in idle engine temps. (Using a Mildon high flow pump.) I just don't think a 10% underdrive is the likely issue in this case.
 
Uh, no. With underdriven pulleys the accessories turn slower for a given RPM. If you slow the engine down, you also slow down the production of heat. It's the relationship between the engine speed and the water pump speed that's important.

So then if I drive 10% slower with more throttle it will overheat? :D
Good thing we never have to go up hills.
I realize slower RPM's with higher load creates more heat but it doesn't fly as a reason for overheating issue's.

Like I said, there are other issue's there.
 
Oh for crying out loud. If you run a 10% underdrive pulley on the water pump, it will ALWAYS spin 10% slower than without one. That means that no matter what situation you encounter, you will have 10% less flow coming out of your water pump when compared to a standard drive. ALWAYS. That reduces your cooling capabilities across the board.

And there are other issues here, because the ratio on his pulleys is standard anyway.
 
Oh for crying out loud. If you run a 10% underdrive pulley on the water pump, it will ALWAYS spin 10% slower than without one. That means that no matter what situation you encounter, you will have 10% less flow coming out of your water pump when compared to a standard drive. ALWAYS. That reduces your cooling capabilities across the board.

And there are other issues here, because the ratio on his pulleys is standard anyway.

:D
Got you goin.
I know exactly how it works and exactly what you are saying.
I just couldn't help wording it in a way that made it hard for you.
Sorry man, I'm well known for that. LOL
 
We all gotta be good at sumpthin' LOL

So 72blunblu, I finally see where you said the Controur fan is only good for 26" rads. I guess that is out, with that and thickness.

Not sure I am doing you much good OP. if you have not read this thread, then please do so, and look at post #6:
My 360 is overheating.....
 
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The fan I have now is not working, what one is a good one for a 22" champion rad. I'm looking for a puller type now.
 
The Taurus fan is the arguably the best fan out there for a 22" radiator. Capable of over 5000 cfm at high speed, and pretty inexpensive compared to any aftermarket fans capable of anything close to those flow numbers. But given the amount of room you have between your radiator and your pulleys, I don't see it fitting. Here's a good thread with a lot of info and pictures...

Taurus fan on Champion radiator
 
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