Lot of tracks these days wont let people run antifreeze or water wetter in 9.90 or faster cars anyhow. I wouldnt run anything but water in a race car, antifreeze is some pretty slick stuff. If you get over 212 on a pass in a drag car something is wrong. I seldom see over 200 even on 95 degree days at the track after back to back 1/4 mile passes.

 

Gotcha KP. But Harlan has said that turbo cars need to have some heat in them, so maybe a turbo car will run a lot hotter than a blower car?

 

Thats exhaust heat I would assume, in general its good to get the oil temp up on any engine before making passes but leaving the line over 200 is probably a little hot and thats the only way I could see going above 212. I would think 170-180 water temp is around the best place to be on the line with any setup.

 

From evans site:
"Use of a 7 lb. cap on “waterless” system is recommended for racing, street rod and performance enhanced vehicles. For applications where 7 lb. cap is not available, standard cap may be used. All stock – factory original computer controlled daily driven vehicles are coolant change only – no system changes are required."

they go on to recommend a 0 or 7psi cap on coolant overflow tanks.

but the basic point is correct, that evans is not as prone to cavitation, vaporization and has a lower surface tension so you're less likely to have hot spots, which all adds up to not needing the same pressure in the system that normal coolants need.

 

I am running this Evans NPG waterless coolant on my T-trim 383 mostly for the 2nd set of points. I don't believe it 'pulls heat out' better than straight water. I run no thermostat and a 7lb. cap, but am thinking of adding in a thermostat as I get low temps on the highway, in the 150 range, which I think is too low. Never hits >206 even after idling for 20 minutes in gear after a couple hard WOT runs.

Jim

 

I'm runnin evans coolant and one of their pumps with a 7psi cap, and a 160* stat. As KP stated this coolant may not be allowed on a track.

 

alot of racers i know run there puke tank in the rear behind the rear tires and a 10 pound cap with a #6 line

 

im assuming the reason behind this is less parasitic drain on the motor correct?? Since the water pump isnt pushing water thru a pressurized system??..You could just run an electric water pump and get the same benefits...

 

cylinder presure in the cooling system is the reason

 

What?? Thats the dumbest thing i've ever heard