Originally Posted by jbrown7815
(Post 815395)
Well I haven't done any serious driving since 2010 :( I moved and have been deplyed for the last year. Planning on a 1.8 swap soon hopefully. I did go all water/water wetter though which worked for the track day I made this thread for.
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Yeah I imagine I will do that when I take everything out.
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Originally Posted by jbrown7815
(Post 815404)
Yeah I imagine I will do that when I take everything out.
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Originally Posted by fooger03
(Post 617528)
I'm not sure how you get that the water pump can function at different speeds based on how hot the engine is. I'm also not sure where you get two different pumps at.
That said, removal of the thermostat is indeed evil. Yes, it will increase the rate of flow through the system. But removing that restriction also takes away the key element which causes the coolant pressure within the engine itself to run 1 or 2 atmospheres above the coolant pressure in the radiator, and this increase in pressure does increase the boiling point of the coolant within the engine, which retards the nucleate boiling process. |
Originally Posted by Joe Perez
(Post 815601)
In fairness, by "power plants" I suspect he was talking about commercial power generation or some other industrial application.
That said, removal of the thermostat is indeed evil. Yes, it will increase the rate of flow through the system. But removing that restriction also takes away the key element which causes the coolant pressure within the engine itself to run 1 or 2 atmospheres above the coolant pressure in the radiator, and this increase in pressure does increase the boiling point of the coolant within the engine, which retards the nucleate boiling process. Good info here, never thought of it that way. |
Thats why you gut it instead (great explanation btw Joe! prop ;)). Get ducting first, thats wayy more important than maximizing flow.
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Originally Posted by Track
(Post 815643)
Get ducting first, thats wayy more important than maximizing flow.
As with the powerplant example, there is little use to increase the flow on only one side of the heat transfer, especially if the flow on the other side is the one that needs fixing first. Does anyone know what the pressure difference over the Tstat is at high (but non-cavitating) revs? Just curious of how much higher the pressure is in the head compared to the rad cap. |
I spent 2 days under my car - bumper removed - to do a proper ducting...
Before that, I tried everything I could think of to get the car to cool off - it would cruise at 215* easy at 80mph, I was cycling the A/C off so that it wouldn't go above 235* Now that everything is sealed up, I'm willing to bet that my ~160* thermostat is very rarely full-open. On a 95* day, at 80mph, with the A/C on full blast, I think I was able to get the water temp up to 192* once. I realize it's not track driving, but compare the before-after of doing a proper duct job with that... |
Originally Posted by NiklasFalk
(Post 815804)
It has everything to do with flow, of air through the fins of the rad ;)
As with the powerplant example, there is little use to increase the flow on only one side of the heat transfer, especially if the flow on the other side is the one that needs fixing first. Does anyone know what the pressure difference over the Tstat is at high (but non-cavitating) revs? Just curious of how much higher the pressure is in the head compared to the rad cap. |
Originally Posted by Track
(Post 815831)
Ducting the radiator is much more important than a gutted thermostat. I am not sure what you are trying to say.
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Originally Posted by hustler
(Post 815417)
You have to duct it or it won't work on the track when you learn to drive like a man. Buy a roll of plastic from speedway and a bunch of rivets, thank me later. I'll take detailed pics of my oil cooler set-up if you promise to play handball with me.
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Speedway? Link to sight please |
Originally Posted by TorqueZombie
(Post 816312)
Speedway? Link to sight please |
would removing the AC condenser have an effect? Seems like it should increase the amount of air that the radiator sees by a good amount, what with all the bent fins that they all must have by now.
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Originally Posted by crono36
(Post 851948)
would removing the AC condenser have an effect? Seems like it should increase the amount of air that the radiator sees by a good amount, what with all the bent fins that they all must have by now.
FYI, removing the thermostat is not a good idea. The pressure gradient produced across the thermostat is what moves water through the system. I run a gutted thermostat in Theseus, so you can do that if you want, but don't just remove it. |
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