comon guys!! i been using EVANS since 1989, in my CAMARO, In my V-12 JAGUAR, and since 1998 in my RX7 T11, and now in my FD. Do you know it was developed for BLACKHAWK helicoptors, cant be all that bad, you wouldnt put WATER in one would you!! let me think here,, ETHYLENE GLYCOL was developed in 1943 for that old tank called P-51 MUSTANG , nice old plane, but ancient by todays standards. so why would anyone not use a modern product yesterday is gone forever!!!!!! and it would not surprise me if ther isnt a better coolant out there by now! ( Im not proud of this statment) THANK the GODS for WAR!

Wow.. got me beat... first used Evans in 92

Back from the dead. :)

BTW, I'm still using it. Its good stuff. CJ

I wouldn't put WATER in a Black Hawk because I have absolutely no idea where the radiator fill cap is located. For that matter, where is the radiator? Sorry, but I can't even find any coolant lines running to either of the air-cooled turbine engines on this darn thing.

Hmm, and I thought that ethylene glycol was invented by Charles-Adolphe Wurtz in 1859, and that the water/ethylene-glycol cooled Allison V-1710 engine was first developed for U.S. Navy airships, and saw service in the P-38, P-39, and P-40 before "that old tank" was designed and built.

I think you have been hanging around those Embry-Riddle students too much over there in Daytona. They tend to insert aviation and war into every issue, if you know what I mean. ;)

so, any more possible group buys or whatever was going on earlier?

Contact Blake to see if Pineapple would be interested. CJ

11 pages to save $2.00, gotta love Rotarheads LOL

:rlaugh: Haha....yeah every penny counts when it comes to a Rotary.

Has anyone used both NPG+ and NPG-R, if so what was the noticeable difference if there was any?

-Silvio

yes, nanotechnology. And you will only need a radiator about 1/3 the size.

http://autospeed.drive.com.au/cms/A_2056/article.html
Well, its not on themarket as yet because the equipment to make this is super expensive.

Ran the hill climb last weekend and my cooling system worked great with NPG+.

It was ~90 deg F out and the hill has 1,300 ft elevation change over its 2.2 miles, lots of tight corners.

On my 2nd and 3rd runs up the coolant temps rose to ~1/3rd of gauge (S4 TII) which my Haltech says is ~95 to 100C, oil temps peaked at 100C and EGTs at 800C.

27"x19" Griffin 2 row radiator, NPG+, front mounted stock TII oil cooler and horizontal mount IC with its own inlet duct. 11.5:1 AF under .5 bar boost, 11:1 at 1 bar boost and 10.8:1 after 6,000rpm.

You can't run NPG+ with an EWP though. :( NPG R should be alright.

back up

ok i've been running evans for a while now.......i was just reading up on their website and noticed that it said 7psi pressure cap is recommended..... i have a cap on my car thats over double that, should i not be running that cap?

anyone?

Why run that high of a pressure if it's not required? All it's doing is adding extra stress on parts of your coolant system. A 7 psi cap is cheap and shouldn't much if any effect on coolant temps, but will help reduce load on the seals, coolant hoses, etc....

well it was somthing i just realised, honestly...... i have the greddy cap on my car so that'll be coming off time to get a 7psi cap

7 LB. rad cap
 

HEY! Glassman ,where can I get 7 PSI radiator caps that will fit the Mazda RX7 , called EVANS they do not supply such. I do it rather crudely by torching the spring and they always vary in pressure, be nice to get hold of an adjustable cap. set it up on a cap test unit ,then set it to maybe 5-7 psi.. thx RON

I found my 7psi cap at PepBoys or Auto Zone a few years ago.

Jack

I just called evans to order a 7psi cap, and the tech support told me that on an rx7 i should be running a stock 13psi cap (ast). Has anyone else run into this? Now i'm really confused..... lol

you should be fine with the 7 psi cap. just don't try to run 0 psi. it didn't work for me. Coolant didn't move back and forth between the overflow appropriately.

I have always run the no pressure cap and never have any problems. In fact went to Lime Rock to today, max water temp on PFC, 85C.

I think part of my problem was that in the beginning people were "modding" their stock caps to get 0 psi. I can't recall the exact circumstances because it has been so long, but I think it my case my "modded 0 psi cap" wasn't 100% sealed, so no vacuum was able to be developed when things cooled and the evans didn't move from the overflow back to the radiator. It seems reasonable that with a properly sealed 0 psi cap things should work ok. I guess I should add also YMMV.

85C at the track? what was the ambient temp? what mods do you have? Once warm I haven't seen 85C since I was totally stock.

Air temps were in the low 60's F

Koyo N pass Radiator
Crooked Willow Double Oil Coolers
Vented Hood
Aquamist 1s Water injection
M2 Medium IC
To4E 57 trim .84 a/r (12.5 psi)
Open Exhaust