water wetter - black magic or does it work

[Chewitt]

wondered if anyone uses it?


would like to see your view

thanks

[Gazzab]

It works.

[Guillotine]

and

[Chewitt]

well after the running temp comments and the wetter comments...



I'm off to get myself a Cerbie tomorrow

[spend]

I'm not convinced it does much like it says on the tin, but I'm fairly sure it makes bleeding air less of a problem.

[Boosted LS1]

I think Evans coolant looks pretty good and some people I know in the US say it's saved their desert racing engines.

[hiltonig]

Yep I am about the use the evans stuff too

[redeye]

Evans? whats evens? were can i get it ? never heard of it

[hiltonig]

Just google evens npg coolant

[USTVRDUDE]

I used it in an IROC Camaro I used to Sprint as such. It helped a good bit. Still ran warm, but on Average days, it was no longer a problem of boiling over.

[BeastMaster]

Fine for track car, but believe these types of additives do not work well with antifreeze.

For a road car this would be a pita, and would have thought the time and money spent changing fluids twice a year should be spent sorting the existing system, which if in good working order should cope.

IMHO

Andy

[leaderb]

Just googled Evans npg as suggested and it looks interesting; seems to be (if I've read it correctly) that anti-freeze is unnecessary and essentially one fill up of the system (barring leaks) would pretty much last a lifetime. Is it compatible with a stock coolant system though, or would it require new fuel pump/radiator?

[Podie]

WW was worth about 6oC in my Chimaera

[dvs_dave]

I've looked at the Evans NPG, and whilst it does what it says on the tin, I believe that in an already healthy cooling system, the reality is that the whole system actually runs hotter than with water. This is because it has a lower specific heat capacity than water. This means that for each unit volume of coolant flow, less heat is carried away and dissipated so the system ends up stabilising at a higher temperature.

Now, as it doesn't boil you don't get cavitation so less hotspots within the head, but I'm not sure if generally running the engine hotter has any detrimental long term effect.

The primary purpose of water wetter is to improve the contact surface area of the water in hot spots, thereby increasing the amount of heat transferred into the water.

At the end of the day, you have to ask yourself what racing/rally cars use, and use the same as they'll be using the most effective option.

Something tells me it's probably just plain old water with a drop of anti-freeze.

Edited by dvs_dave on Monday 13th September 17:23