Hello All

Has anyone hear of this company or products from them especially their coolant? My friend showed me a big article in the January 2002 GM High-Tech Performance magazine on their products. Does anyone have any comments on them at all?
http://forums.evanscooling.com/index2.html http://forums.evanscooling.com/main31.htm

 

I have been using the Evans NPG coolant now for more than a year and a half. I needed a water pump so I changed the system to their coolant, using their pump (which you have to do). Anyway I don't see any difference in indicated temps, but what did attract me to NPG is that it will never boil over in traffic and leave you stranded. We have summer temps here over 100 and before the switch to NPG the car would get hot enough to start to boil over and then start running like crap as it developed major hot spots inside the engine. I still think I need a bigger radiator and maybe more pump volume. The EVANS stuff is high dollar, about 20 a gallon.

 

Uhhh, yeah. That stuff is flammable too, so make sure your hoses are in good shape or get braided.



[Modified by White Lightning 89, 2:28 PM 10/31/2001]

 

flammable coolant? :eek: I don't think I need any of that.

 

Sounds like a major gimmick to me. They say that engines run more efficiently at high temps :bs :bs :bs

Emmisions wise maybe, what about detonation? Lets run the motor at 280 degrees and let it detonate like crazy and destroy my bottom end. I guess it didn't boil over, what a prize that would be.

 

I ran evans in my GN (25-28psi of boost with 93 octane fuel). Two main reasons, the 1st being it won't wipe out the bearings, cam and turbocharger if it contaminates the oil. The 2nd reason is dramatically reduced detonation even at elevated temperatures.

With an adequate cooling system the temperature doesn't increase. If it does, look at the possible increased temperature this way:

With a 15psi cap, conventional coolant mixes boil between 265 and 280 degrees.

Evans with no cap boils at 370 degrees. That's 0.0 psi and still at least 90 degrees hotter before boiling.

At least with the Buick, the detonation stems primarily from steam pockets that form in the hot spots of the head. The pocket just has to be there for a second to get the detonation started and then the process loses control with chamber temperatures and pressures through the roof.

I saw less detonation on my GN, even running temperatures 20-30 degrees warmer with a stock radiator and pump with a front mount intercooler.

The flammable warning is "may ignite if above 240F and comes in contact with open flame." I'm not sure how hot oil has to be before it flames up....

The other benefit of a low or no pressure cap is it sure puts a lot less stress on the hoses, radiator and the extremely difficult to change heater core.

Mark

 

[QUOTE]Uhhh, yeah. That stuff is flammable too, so make sure your hoses are in good shape or get braided.

???? :confused: :confused: :confused: :confused:

Since when is food-grade propylene glycol flammable??? That statement is pure :bs Propylene glycol isn't flammable, isn't toxic to the environment and works like a charm....especially for those who have gone to a big-cube motor.

One of our club members has a 67 BB 427 and put a huge Griffon radiator, all the normal stuff and could not keep it cool in traffic or in the pits at the track. He installed the Evans system (water pump & Evans-specific Griffon radiator with larger inlet/outlet tubes & Evans NPG+ coolant) and has never had it get overheated since.

What you have to understand is that to get the maximum benefit of their coolant, you need to go the whole route. Their water pump & radiator combo flows somewhere around 3x the flow of a stock system. And it does it at a much lower pressure that a stock system. When the 427 SB goes in, I'll use it in my car.

The only reason that SCCA PRO doesn't allow Evans to be used is that IF a hose blows, propylene glycol is slick as snot. It isn't something you want on a race track....

And NO, I don't work for Evans. Just spent enough time and energy to actually call them, talk to them for over 30 minutes AND got them to fax me a customer list that had done the same application/horsepower that I was planning on doing. There is nothing greater than a satisfied customer....and I talked to over 10 of them!!

Like a previous post said, it boils at a higher temperature than "normal" coolant combo's. You'll see some benefits there alone. The other side is it will NEVER freeze solid in a motor. Somewhere around -40F, it turns to a slush. Best of both worlds...

 

In addition Evans invented the reverse flow cooling used by GM in the LT1 motor. Evans demo'd the concept to GM engineers in hopes of licensing the technology, but GM found it easier to just take the idea for free. (Evans neglected to patent the concept in time.)
http://www.ipo.org/EvansCooling.htm

 

Concur with the Evans proponents- there is nothing "gimicky" about it at all- it's expensive because it's less prevalent than glycol, and I'm surprised that the EPA, in all it's infinite wisdom, isn't mandating the OEM's to use it- if you read about the properties as it reaches around the combustion chamber, you'll understand why it limits detonation- I removed my knock sensor, and I've never had a knock, even here in cool central Florida.

 

i was going to switch to Evans last year but i couldn't get a straight answer from them as to whether or not i needed their pump and / or thermostat. So question to those using it:

Can you run a thermostat with stock pump??? (girl at Evans didn't think i could, but couldn't confirm). That would be a problem for me as i live in the NE.

Do i need their pump/radiator/etc??? (Girl at evans didn't think so, but see issue on Thermostat)

I called them twice and asked for confirmation, but got no response and gave up. Wanted to get the car back on the road and couldn't wait any longer :-( I was hoping to be able to run a little more timing without casuing detonation, plus get the other inherent benefits. May still swap someday, but need to get my questions answered first.

 

Who
has
such
a
BIG
jpg photo
that
I
have
to
scroll
back
&
forth
to
read
this post
:mad

 

I don't know, but who runs a screen resolution of 320x200?

 

JP,
I
agree
with
you.
big
photos
STINK.
:blueangel:

 

So when a hose popped on one of the Grand Sport Race cars in 99, it must have been the water that caught on fire huh Joe.... :mad

 

Sorry Daniel. I have a bottle of pure food-grade propylene glycol that we use to winterize the water supply in our RV. I can't get it to light, not even with my cigar torch (over 1,200 degrees).

Dean told me they cut a fuel line on that occasion (as well as the radiator hose). Who knows, I guess anything is flammable if you get it hot enough....even standard anti-freeze...

By the way I did toast the motor last weekend. Looks like I sucked some air into the pickup and trashed either the #1 or #2 rod bearing :(

I had an Accusump sitting on the shelf to install this winter. What a bummer...

As far as the patent litigation....I don't know where Evans thinks they invented reverse-flow cooling (must be doing REALLY good drugs). Smokey Yunick was doing that back in the 60's....


[Modified by Joe90, 9:19 AM 11/2/2001]

 

I don't think they cut a fuel line then. For some reason or another, they were running rubber hose that hadn't been changed in a while, and it popped. That stuff had to have atomized somehow to flame, but it did.

Sorry to hear about the L98 this weekend. Are you just going ahead with the 427 or are you going to pull the crank and polish it and keep running what you have?

Did you loose it on that sweeper at the furthest south part of the track?

What did you think about those 2 C5s almost back to back putting them in the ditch? They were both on those BFG KDs.

 

Not sure where it happened. I think it could have been under braking at that first 120 degree right-hander. Or it may have happened at the entry to the slalom. With those Goodyears on it, heavy braking would push all the oil to the front of the pan away from the pick-up.

There isn't enough grip on that sweeper to push all the oil to the side...now maybe turn 1 at TWS I could see that happening, but not at Grand Sport.

I think for the short term I'll pull the motor and have Dave rebuild it again. The 427 is still in the works, I'm just having a hard time socking away the $5,300 for those heads. I'll keep plugging away at it though. The bottom-end components should be here in a few weeks, so they can get the hard stuff done and then when the heads arrive finish the assembly. I'll likely not do much racing next year. I've got a course at the college to go through that is 4 days a week (Mon-Tue-Thurs-Fri) for the entire Spring/Summer semesters. I'll have my hands full with that AND building the barn/workshop (read this as TOY barn) on our river-front property. It'll be 6000 sq/ft and we'll be able to park the bus, tractor, cars & trailers all inside. I will have about 1800 sq/ft for shop area which will be temperature-controlled. Should be enough space to play with a few toys at a time :D

 

I used this in my Mustang for a while but gave up on it and went to 100% distilled water and Water Wetter instead.

Two problems I had:

1) It continuously attacked the paper gaskets in the water pump. The gasket weakens, begins to leak and in one case blew out and dumped the expensive coolant on RT 18.

2) Because of the gasket seepage the car constantly smelled ALL of the time like a coolant smell but even sweeter. Not a good thing when you pull in the tech line at the drag strip.

The other thing is that when I went to distilled water and Water Wetter, the cooling system performed about an average of 20 deg cooler. I'll stick will water, thank you very much.

 

Huh? If your paper gasket failed, it wasn't from exposure to propylene glycol.

 

Well that's what I had thought too, so I switched to a different water pump and had the same problem. Gaskets become very soft and saturated with propylene glycol. Went back to water/glycol and the problem went away.

I was told by Evans that the NPG has a high viscosity and that it will find every little nook and cranny. In fact, when I informed Evans of the constant coolant smell they indicated that this was "normal". FWIW.


Maybe it's a unique combination of temperature/pressure/PG that are causing the problem in my situation. Don't know but it was too much effort for me to find out for very little gain.