Others have done hood vents/louvers, and as mentioned AEV's hood has the feature. I'm guessing it would indeed have the effect of venting hot air, finding the most effective combo will be the key. I like the vents on that SUV you posted, would be subtle and functional, just don't know how effective they would be.

 

WaterWetter is great stuff. The way it works is it increases the surface tension of water or coolant. This decreases the size of air bubbles around heated up parts through the water jacket allowing them to cool more efficiently. More surface contact, better cooling and similar to what you might see on the bottom of a pot of water before it boils the air bubbles would be smaller as Water Wetter holds on to the surface better. I started using it in my Chevelle which really doesn't like to stand still in traffic and it's widely used in racing engines.

I do run a 180 degree T-stat in the JK during the summer months. It will throw a CEL without a programmer and conversely a programmer set to 180 degrees without a matching T-stat will throw a DTC, leaving a fan relay open. Always set the fan on temperature 10-20 degrees higher than the thermostat. I always check them on the stove in some water when doing the winter/summer swap to make sure they are opening at the right temperature and because I'm too cheap to just throw them away when they are working fine. It also builds a little excitement into my household every time my wife sees me using the stove to cook or bake auto parts.

In case no one noticed, the stock water temperature gauge on the JK is pretty much worthless. It will peg itself straight up and dead center through the entire operating temperature range. So whether your coolant temperature is at 180 or 230 that gauge is dead center, but you can smile and be happy because Chrysler wanted to make sure your vehicle is running perfectly all the time.

I did a lot of work to build efficiencies into my JK because it's not just a weekend toy for me but a daily driver. I had a long commute and also a lot of long road trips for work and pleasure. I did things that build efficiencies and often did them collectively so I can't really tell you how much any one of them helped. What I do know is that my JK gets gas mileage that others shake their head at in disbelief and as an added bonus makes some additional power with heat relief under the hood.

 

I used waterwetter in my Chevy 350 in my old willys, that stuff really works

 

perfect....thank you do you remember the web site by chance?

 

i ordered these



so when i cut the hood, what should i do about the paint?
have that area resprayed?

if that's the case i'm thinking about spraying both sides black. just the lip or part that's folded down.

comments?suggestions?

 

I remember there was a Mercedes S class that got very hot under the hood, over time it would fry the wire looms and cause shorts.

I hope that doesn't start happening with the JKs.

 

hey they look good. how much and where? and as far as the paint, i would outline it in black, about 1/4" to 3/8" and do both sides

 

i think the one syou ordered are best for where you live. Even the rock trails up here your still gonan get mud and water. Those functional hood vents are for the moab boys or the west coast guys. In VA we will in the woods throught the mud and the only thin i plan on doing to my hood is a snorkel and maybe gettign a better electric fan for the radiator.

 

Well?? Bump for installed pics! Heres some GenRight Louvers i put on my old Tj, i cant really tell you if it helped, made me feel better and it looks great to me. I want a snorkel because that is really pulling cooler air into the engine, but vents always look good/different and i hate seeing the heat vapors coming off my hood. Anyways...

 

Maybe instead of trying to force cold air in on top of the hood against rising heat you would be better off with an electric fan in the hood blowing the hot air out through a vent. Don't a lot of rock crawler guys put fans in the hood to blow air out when moving real slow to help rid hot air from under the hood.