Super Chevy Mag had a blerb on Evans Cooling products, and non-aquius cooling product. It virtually eliminates boil over, and supposedly, it will cut down detonation by eliminating steam pocket induced overheating.

I have a 427 with 9.7 CR which is getting close to start-up/break-in. I plan to run pump gas, but am a little concerned about detonation.

Any opinion on the value of this product. It'll cost about $125 for enough coolant, so that's alot more money than ethylene glycol. Also, since the evans product is non-compatable with water, if I'm going to do it, now is the time.

427 big block?

you should have no problem with cooling at that
low compression.

I have a 69 427 Big block engine,stockcompression,
but it has an Edelbrock performer cam,and maybe that helps keep the compression down.?

I have added a 180 high flow t'stat;and a
Griffin Alum radiator,along with a shroud,and the
clutch fan hub has been replace,as the stock one
was noisy.

I run Green prestone,at 60% coolant 40% tap water.

Originally posted by Unreal:
Any opinion on the value of this product. It'll cost about $125 for enough coolant, so that's alot more money than ethylene glycol. Also, since the evans product is non-compatable with water, if I'm going to do it, now is the time. It's "Snake Oil" :rolleyes:

"Marketing, son, marketing...that's where the money is" :( graemlins/clonk.gif

I have watched the development of this product for this market over the last few years. Evans has a product that does what it says it does.

The good part is that it does not contain water which means no rust, corrosion and/or lasts forever in you system and NO pressure buildup! It also is propylene glycol (PG) based which is an food additive that you can consume, so the environmental friendly part is accurate as well. It also provide a very high boiling protection (great for hot spots) and very low freezing points. This is good too.

The downside to this product is that it is expensive, if you lose any and dilute with water you have to start all over, and more over the fact that PG is not as good as heat carrier (specific heat number is lower) than regular antifreeze and certainly water. Therefore use in a marginal system could actually aggrevate the situation regardless of the fact that it may goe to 270 degrees without boiling.

If you expect your cooling system will never be broken and you want a corrosion free product AND DON'T HAVE ANY COOLING ISSUE WITH REGARDS TO CAPACITY) then this product would be for you as it is for many over-the-road trucks etc.

But, other than that application, stick with regular antifreeze and water.