Well yes. Just tossing it out there.

Hmm the internets have lied to me. 66-70% actually. Compared to say, Peak Long Life Coolant at 90-97%.

Evans:
$44/gallon
375*f boiling point
3% water

Peak Long Life:
$15/gallon
349*f boiling point
4% water


Both are toxic and will kill you and your kitty. One is reasonably priced, the other includes a massive markup to pay for BigChin(tm) advertising. If you really think it's OK to run an engine well above safe operating temperatures, save yourself $30/gallon and run Peak Long Life at full strength. Your engine will self destruct long before it boils.


http://images.peakauto.com/Peak%20Lo...v%20052013.pdf

http://www.rx7club.com/attachments/3...ev-2-11-03-doc

If that doesn't work go here
All you wanted to know about Evans NPG+ (MSDS)!! - RX7Club.com


Your thermal transfer properties will be shit, but the important thing is your coolant won't boil until well after the engine blows up. Go read some posts by our resident 1st place racers and see what they run. Hint: Their water content equals Peak's ethylene glycol content. Because racecar water is much better at transferring heat than either glycol.

I was just kidding. :makeout:

My humor, good or bad, doesn't translate well to forums...

Evans is about 2/3rds ethylene glycol. Sierra antifreeze is propylene glycol. You could blend Peak and Sierra to get the same ratio of propylene and ethylene glycol.

However, Evans claim they have some proprietary additives.. so your DIY blend may not be the same <shrug>.

Here's one article that discusses an Evans test on the dyno, reducing detonation:
Successful Big Block Engine Buildup - Hot Rod Magazine

This statement is really hokey to me:
Evans' response to the norosion report, bit past halfway down here:
Evanscooling - Bob Is The Oil Guy

The Sierra MSDS makes the same claims about proprietary additives. How are we to say one is better than the other. If you want a "waterless" (having 3% of something does not mean that it is waterless, sorry Evans), high boiling point coolant, save a bunch of money and effort and pick up a jug of Peak Long Life full-strength antifreeze (from your local auto parts or big box store) and be done with it.

The Evans spec is that you're allowed UP TO 3% water without significant degredation is effectiveness. There isn't any water already in it.

Well I wonder why Evans would blend the 2 instead of using just 1.

The stuff provides comparable heat transfer by operating at a higher delta T. engine will be 10 to 15% hotter while stabilized at the same heat transfer rate. It can do that because it doesn’t boil as easily.

There is at least 2% water in Evans as per their MSDS. Actual amount is not specified but it's listed above the 2% additive package and therefore has more of it.

If the engine is 10% hotter than normal, is the oil also 10% hotter?

What causes a head to warp? Overall temperature or localized hot spots from boiled coolant? My google-fu has failed me.

Of course I did discount every claim they make when seeing the "more info" link point back to their main page. Marketing != tech info

With water or 50/50 EG/water, when the cylinder head reaches a certain temperature (way above the boiling point), the boiling on the surface is so bad an insulating layer of steam forms. At this point the cylinder head temperature will begin to rise very quickly leading to bad hostpots and detonation. Evans' claim to fame is that the boiling temperature is so high that this doesn't happen until a much higher average engine/coolant temperature.

Conduction is a function of difference in temperature on an absolute scale, so if the engine is running 10% hotter, than the engine will conduct 10% more heat energy into the oil. This is a gross over simplification, but the analogy is soundish.

And I'm saying you can have the same benefit by running non-diluted Peak and save $30/gallon.

I wonder if 2/3rd Peak and 1/3rd Sierra has advantages over 100% Peak. Why would Evans mix them?

Could you attach temp sensors to the head and block and do some back to back testing with data logs synched to a head and block temperature recorder? Oil temps too.

I guess someone could drop $100 bucks on a spark plug ring cylinder head temp thermonuclear setup.

REVIVE!


I was at a meet this past weekend and this guy with some weird charge piping was talking about waterless coolant as I observed his car had no overflow tank. Did anyone end up trying this? If the engine is run a bit hotter, what does this mean for the thermostat that's in the car?

I'm just gonna leave this here...

I've just wasted8 minutes of my life to this guy ramble about his interaction with a name on the internet. Where the hell is the next video explaining why all of this is rubbish? Maybe this is what you meant to post:



I don't have time to watch this right now, but in any event, I'm fine with my distilled+water wetter for now. I was just curious what the collective knowledge base had to say if there was real world experience.