Coolant additives

[Mooseman]

Project Farm just did a video on comparisons of different additives to help lower coolant temps. Although he didn't test the additive, he did test the coolant with Water Wetter, which has been recommended in this forum for years. I know I've been using Water Wetter for years and it does help with heat transfer.

 

[CaptCaper]

Seems RedLine Water Wetter did the best. Seems ya can't go wrong with using it.

 

[earthling]

Just a note:

The 998 engine is thermally limited, meaning it has a restricted cooling capacity, which can cause it to overheat if left idling for too long. To prevent this, it requires two key conditions: adequate airflow while the vehicle is in motion and the proper functioning of the thermosiphon after shutdown (the bubbling or gurgling sound you hear when you turn off the engine).

The thermosiphon works by allowing water in the cooling system to boil, turning it into gas, and then condensing back into liquid. This process efficiently removes heat from the turbo after shutdown. As the water converts to gas, it releases stored heat energy, and as it condenses back into water it becomes available to absorb more heat, this cycle (water->gas->water) cools the system more quickly, using no power.

If you’re running a tune and frequently performing hard pulls, I strongly advise against using products that raise the boiling temperature of the coolant without doing some testing. A higher boiling point can interfere with the thermosiphon’s natural cooling process. Instead, installing a radiator from BOP would be a much better solution. It enhances the overall cooling capacity while still allowing the thermosiphon to function effectively.

More here: https://ty4stroke.com/threads/winder-cool-down-is-running-the-motor-at-idle-necassary.167776/

 

[Mooseman]

Interesting. Since I'm not familiar with Winders, I can't really say anything except maybe that these coolant additives don't raise the boiling point but helps remove surface tension of the coolant/water mix to help heat transfer, so if anything, it would help the thermosyphon process as more heat would be transferred from the engine to the coolant. What does raise the boiling point is a higher coolant to water ratio and system pressure, which is controlled by the cap.

 

[earthling]

All of the additives raise the boiling point. In a normal car or any vehicle really that is not thermally limited (can safely idle for extended periods) it is beneficial to raise the boiling point because you have enough surface area in the radiator to absorb the heat. In the winder the radiator is insufficient so they designed in a thermosiphon and placed it right next to the turbo where it does the most good. Having a lower surface tension won't matter much but raising the boiling point will neutralize the thermosiphon process or dilute the efficiency enough that it could cause problems. I am not saying 'don't do it' I am just reminding everyone of how the thermosiphon works and that if you are going to run some form of coolant additive you should do some testing before/after to make sure you aren't creating an additional problem.

 

[YukonMP]

Water Wetter makes no mention of raising the boiling point of the coolant in their product description. Anybody know where I can find out by how much?

 

[twyztid]

I've never heard of Water Wetter raising the boiling point of coolant. It is added to reduce surface tension so that the coolant can work better to remove heat. I have also read that a couple of drops of Dawn dish soap can do the same thing (reduce surface tension).

 

[earthling]

According to their website, Water Wetter doesn't raise the temperature by much.

I've never heard of Water Wetter raising the boiling point of coolant. It is added to reduce surface tension so that the coolant can work better to remove heat. I have also read that a couple of drops of Dawn dish soap can do the same thing (reduce surface tension).

According to the redline website (it is water wetter and coolant) it states the temperature rise isn't significant. The project farms test showed that it raised the boiling point slightly. The boiling point is part of the issue, also any residue left behind after water boiling away would be another consideration. Test, test, test.