heat pockets?

[~The Jester~]

Originally Posted by rwhite65

ok, now that I know how to bleed it...here is some more questions. What does everyone run their coolant mixture at? 50/50? 20/80?

Has anyone had good luck with Redline water wetter? I think the coolest I can have the fan kick on is right around 158*.
Ryan

The closer you get to 100% water, the BETTER the system cools. Straight water dissipates heat better than a 50/50 mix. HOWEVER, straight water boils at 212*. The way around that is either pressurize the system (ie 7lb cap) and/or add antifreeze. So, for that reason I run 50/50 in the street engines. The race engines get straight water, BUT I add a jug of water wetter. Actually I use the "Purple Ice" stuff from Summit. It literally knocked 13* off of my water temp, all by itself.

Being a professional firefighter, I've read hundreds of articles on the characteristics of water, for obvious reasons. Mainly what's called friction loss. 150psi at the fire engine IS NOT 150psi at the end of that 200' hose. One way around that is exactly what you said. Water wetter. What it does, is breaks the surface tension of the water, and lets it "slide" through the hose easier. Think of it as water lube. It literally makes the water more slippery. Getting away from the firetruck stuff, this means more efficient cooling in the car world.

As a bonus, most companies are adding corrosion inhibitors to their water wetters. That's how most guys get away with running straight water in a race engine.

Long story short, I recommend a 50/50 mix with a jug of water wetter (of your choice) in streeet engines. You'll be a happy camper.