[doc_floyd]

Installed hood lovers today: (Data suggest this will lower under-hood temps by 27-30 degrees at highway speeds.)

This is a simple install - several tools have been recommended, an air nibbler, air saw, air cut-off tool, etc.

First, mask off the area. I got the Genright lovers. Use the louvers as a template and drill your holes for the rivets (I used #6 SS machine screws with ny-lock nuts). Do this first - for if you cut out the interior template, then it is difficult to mount the lovers and line up the holes easily.

Second, after drilling the holes for the louver, then draw the lines (I made a template) for the cut-out, you can clearly see where the holes are.

Third, as Harbor Freight had a $10 cut-off tool, I got it but it was a PITA to cut the first line and after that I just used my jig saw with 24 teeth/in, and it cut through like a knife through butter.

Stu Olson's write up is good for the pics.

[[ITA]Tsunami]

Do they work? Did you already took some temp reading after installing the louvers? i'm interested to make this mod too. Why don't you put some picture of yours?

[doc_floyd]

Here is a link:
The first is Stu Olson's, I did it just like his.

http://www.stu-offroad.com/body/hoodlouver/hoodlouver-1.htm

The second is from genright.
http://www.boulderbars.com/Gen-Right_0207.pdf

I just used the two long (15 x 4) louvers.

[doc_floyd]

Here is a link:
The first is Stu Olson's, I did it just like his.

http://www.stu-offroad.com/body/hoodlouver/hoodlouver-1.htm

The second is from genright.
http://www.boulderbars.com/Gen-Right_0207.pdf

I just used the two long (15 x 4) louvers.

[chadsmeltzer]

Wouldn't this act like a CAI, but actually letting cool air in? If so, would this help the I6 any, maybe a little power?
I've been thinking about doing this for a while, but I didn't know if it would really help any.

[doc_floyd]

The value is only for those of us who may operate the vehicle in extremely warm temperatures - last year on Lockhart Basin in Moab, the exterior thermometer read not lower than 109 degrees and as high (while moving) as 120. Any device which will lower underhood temps 27 degrees (measured at 92+ degrees ambient, and 60 mph) is a good deal to me, albeit that at slower speeds the temperature reduction is only 12-15 degrees. It can't hurt, and will enable the vehicle not to run cooler, because it will try to run at 210 degrees under any condition -- but will allow for the cooling system to be able to handle the ambient temperature when that figure is excessive.

It also allows me to run a radiator screen - to protect against rocks but also an overwhelming insect cloud (common during "love bug season" in the south, as well as when running into clouds of mosquitos the noise of which would serve as torture to terrorists, and the size of which is measured when one hears them discussing, "Shall we eat them here, or take them home for the kids?" The radiator screen significantly decreases airflow, and this serves to largely equalize the negative effects of that device (which can be removed if the temp guage goes too high).

At this point, today in 94 degrees and 68 mph, it stayed steadily on the dot (210). But the amount of hot air coming out caused heat distortion waves...

[FTW Rubi]

how hard would it be to position the louvers over or near the intake to get cooler air for combustion?

[doc_floyd]

Not hard to position, but the data I have seen indicates that at that point (in fact over most of the hood) there is a slight vacuum over the top of the hood, ergo, no air goes in. The air under the hood has a slight positive pressure, forcing air out the louvers -- which is why they work so well. This would not help -- I use a cowl air intake and insulate the intake tube.

[TJeeper]

Here is a picture that shows mine. As stated above, all it does is reduce underhood temps. With my Jeep, on the highway, air pressure builds up under the hood causing the engine temp to climb. Before the louvers, my Jeep would get up to 230 or so, now it stays at 210-215.



A cold air intake is something else, and won't make your Jeep run any cooler. It will deliver more power though. I piped in cold air from the cowl, works better than an underhood filter.

[SJP]

Originally Posted by [ITA]Tsunami

Do they work? Did you already took some temp reading after installing the louvers? i'm interested to make this mod too. Why don't you put some picture of yours?

Here's a similar write up:

Oman Hood Vents

[chadsmeltzer]

I asked about it being similar to a CAI because if it is lowering the inside temp, the intake could get cooler air. Maybe I am way off, but it seems logical.

[Unscathed]

Originally Posted by TJeeper

A cold air intake is something else, and won't make your Jeep run any cooler. It will deliver more power though. I piped in cold air from the cowl, works better than an underhood filter.

Do you have any pictures of your cowl air induction setup?

I have the hole drilled.. just looking for the proper air box housing to run to the TBI

[Zoom By You]

This is not a new concept, both my 1963 Jaguar XKE and my old Toyota Land Cruiser came stock with hood louvers; they really work!

[doc_floyd]

My cowl intake is just like the various write-ups on the net. Do a search.

[Drednot]

I have an AEM intake with the baffle plate insulated to keep the heat away from the intake. I also removed the bezels from around the headlites.This allows more outside airflow to enter the intake area
Even in our 110*+ summer temps, the intake side remains at ambient temprature.

My hood vents reduced the underhood temps by 20* also. 180s to 160s