Running Much Cooler after Coolant Change

[GTFUN]

I got the oil and coolant changed before the rally..
Jason at Team Ford Marietta did a 4 hour air purge on the coolant system and used distilled water.

My car ran about 200 degrees here in the hot Georgia weather before the change...
Now I have not seen it more than 180-182.

My car most likely had air in the system beforehand and wondering just how much of a factor the distilled water had to do with the lower running temps now?

I am very pleased and thought I would pass it on..

 

[2112]

If they used less Coolant/antifreeze, that will have helped too. Straight distilled water will run cooler than 50/50 mix.

 

[GTFUN]

If they used less Coolant/antifreeze, that will have helped too. Straight distilled water will run cooler than 50/50 mix.

Pretty amazing.. Wonder how many people don't know what a difference it makes.

 

[2112]

I am sure the vacuum helped the most. The other things like straight water or water and water wetter also help but I am sure they would have told you they used that.

 

[fjpikul]

Nice if you live where it's warm all the time, but no chance taking here in Illinois.

 

[shelbyelite]

We use the same system. We also use 50/50 mix coolant and water and add a bottle of waterwetter. This is a good combo

 

[FENZO]

As with seemingly everything, it is more complicated than you would think. I won't go into dynamic viscosity, head loss, corrosion, thermal conductivity, specific gravity, specific heat capacity, surface tension, etc.... but you definitely want to use DI water with enough coolant to prevent freezing based on your conditions; no more, no less. But pure water should be avoided also for long term use, because of the necessary additives in coolant. Plus a hard fill is a must since air does not transport heat very well. The properties of the mix will change over time so a change interval is a must, just like oil.

I agree, it is amazing the differences between what may seem like the same thing in a bucket.

 

[2112]

As with seemingly everything, it is more complicated than you would think. I won't go into dynamic viscosity, head loss, corrosion, thermal conductivity, specific gravity, specific heat capacity, surface tension, etc.... but you definitely want to use DI water with enough coolant to prevent freezing based on your conditions; no more, no less. But pure water should be avoided also for long term use, because of the necessary additives in coolant. Plus a hard fill is a must since air does not transport heat very well. The properties of the mix will change over time so a change interval is a must, just like oil.

I agree, it is amazing the differences between what may seem like the same thing in a bucket.

Good information.

In my boat with heat exchangers (no radiators) with a 4 gallon capacity, I use 25% coolant for the protection and water wetter. 20 degrees cooler than 50/50 mix.

 

[HHGT]

As with seemingly everything, it is more complicated than you would think. I won't go into dynamic viscosity, head loss, corrosion, thermal conductivity, specific gravity, specific heat capacity, surface tension, etc.... but you definitely want to use DI water with enough coolant to prevent freezing based on your conditions; no more, no less. But pure water should be avoided also for long term use, because of the necessary additives in coolant. Plus a hard fill is a must since air does not transport heat very well. The properties of the mix will change over time so a change interval is a must, just like oil.

I agree, it is amazing the differences between what may seem like the same thing in a bucket.

Can you go into Computational Fluid Dynamics, Entropy & Enthalpy too please... :biggrin

 

[tpraceman]

Oh great now I cant even change water by myself

 

[FENZO]

Can you go into Computational Fluid Dynamics, Entropy & Enthalpy too please... :biggrin

Whew...tall order. CFD and Enthalpy are easy.... Entropy is another animal altogether. Simply put, from a simple mind (and DBK will likely agree considering recent events), if you agree that entropy is akin to chaos; a local decrease is only possible at the expense of an increase of the surroundings and never reduces.

That confuses me, so I follow a simple rule that is true for most things in life: It's all about surface area.

But seriously, I'll admit that I spent years neglecting my coolant cocktail on other vehicles due to ignorance.

 

[timcantwell]

The biggest thing that helps cooling when doing a change is getting any air bubbles out of the line. I saw one of my Ferrari's go down 50 degrees just by "burping" the system with no coolant change.

 

[red gt 1442]

Coming from years of heat issues.....(look up threads about this from 2006 where my radiator was actually faulty) I have been dowm many of roads trying to make my car cooler.......after many trials, the best I was able to come up with for normal temps ( 180/200) getting the fans to come on earlier than stock, bleed the system correctly (as there is a special tool for this I was told)and fill with Waterwetter. When we were at rally 5 in Virginia, I was one of the few cars on track that could do 6 or 7 laps at full throttle, without issues,,,,...In traffic in NYC, I am still expierincing 200 Dgs temperatures...and if I keep the car in 2nd or 3rd...under 60 MPH, I will go to 210 very easily..........These cars need to breathe, and there is not much else to do but keep a constant vigil............My question is: I was told that Waterwetter should not ever be mixed with anything else...yet, i read post's here where some have mixed this cocktail......is this mixture possible? I was led to believe otherwise..........anyone?




Gino

 

[nota4re]

Jason at Team Ford Marietta did a 4 hour air purge

Do you know what this entails? I've never heard of it before.

 

[GTFUN]

Do you know what this entails? I've never heard of it before.

I think it takes that much time to ensure complete air removal..
Many people are not that patient but apparently it helps.

Jason is a highly quailified GT tech and recommends this slow bleed..

 

[paul b]

Is your procedure better than the air-lift system?

 

[2112]

I was told that Waterwetter should not ever be mixed with anything else...yet, i read post's here where some have mixed this cocktail......is this mixture possible? I was led to believe otherwise..........anyone?
Gino

I was told Water wetter and distilled water alone were the best for cooling. But as Fenzo mentioned, you do not have freezing or corrosion protection.

here is another product that comes highly recommended by some circle track racing friends of mine;

http://www.amazon.com/Engine-Ice-Hi..._1?s=automotive&ie=UTF8&qid=1313860909&sr=1-1