Those running Evans at zero pressure look - quick question
04-20-05, 02:04 PM
#26
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Originally Posted by Mike Nola
The properties of Evans Coolant compared to pure water and 50/50 water/antifreeze can be found here:
http://www.evanscooling.com/html/tech1.htm#ptbl1
I seem to have been misunderstood, i didn't say don't use evans i said don't use a zero pressure system, which also seems to be the recommendation of the manufacturer of Evans, and the recommendation of people who have run at zero pressure.
Do what you wanna.
http://www.evanscooling.com/html/tech1.htm#ptbl1
I seem to have been misunderstood, i didn't say don't use evans i said don't use a zero pressure system, which also seems to be the recommendation of the manufacturer of Evans, and the recommendation of people who have run at zero pressure.
Do what you wanna.
Originally Posted by Mike Nola
Lowering the pressure also lowers the boiling point. Zero pressure cooling system in a car famous for cooling issues with an engine design infamous for intolerance to overheating sounds like trouble to me
Mike
Mike
04-21-05, 02:15 PM
#28
Rotary Enthusiast
Originally Posted by DaveW
Just a general note:
Any fluid will cavitate if the minimum pump inlet or internal pressure drops to near the fluid's vapor pressure at that temperature. Even if the fluid's vapor pressure is very low, near zero absolute pressure, a pressure cap will add a margin of safety against cavitation and loss of cooling efficiency.
Several previous posts have mentioned additional benefits of pressurizing the coolant, so, IMO, it would be safer to use, say, a 7-psi cap, even with the Evans coolant.
Any fluid will cavitate if the minimum pump inlet or internal pressure drops to near the fluid's vapor pressure at that temperature. Even if the fluid's vapor pressure is very low, near zero absolute pressure, a pressure cap will add a margin of safety against cavitation and loss of cooling efficiency.
Several previous posts have mentioned additional benefits of pressurizing the coolant, so, IMO, it would be safer to use, say, a 7-psi cap, even with the Evans coolant.
04-21-05, 03:48 PM
#29
Originally Posted by Scrub
When I ran 0 psi the coolant would leak out of the top from time to time....the smell got old real quick. I am now running a 14psi cap because I couldn't find a 7psi one.....anyone know where a 7psi cap can be found?
Thanks,
Dan
Thanks,
Dan
Took the guy quite a while to figure out that:
a) I didn't have the stock AST and
b) That I really wanted to run lower than stock pressure
But we eventually found something that fit.
04-21-05, 10:04 PM
#35
Super Snuggles
Originally Posted by Scrub
are those meant for the AST or the filler neck? I got rid of the AST a while ago.
04-22-05, 03:59 AM
#36
Originally Posted by 7racer
damian does and runs Zero pressure on both his track and street car. If I remember correctly, he doesn't have the the "weep hole" mod nor the not having a thermostat as the Evans website suggests.
maybe he'll drop someone can PM to comment in this thread...
Maxcooper recently switched but I'm not sure if he is running zero pressure
maybe he'll drop someone can PM to comment in this thread...
Maxcooper recently switched but I'm not sure if he is running zero pressure
yup, i run evens at 0 pressure in both cars, no ast in either car, no wheep hole mod, running standard thermostat
I have no cooling issues in either car.... and I drive them both very hard.
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