4bangerjp.com
General Forums => The Mess Hall => Topic started by: jfrabat on October 22, 2008, 11:13:15 AM
-
So, I was surfing the web, and I came accross these (http://www.polyperformance.com/shop/Jeep-TJ-LJ-YJ-Hood-Louver-Set-p-2374.html) hood louvers.
(http://www.polyperformance.com/shop/images/P/t_2374.jpg)
Supposedly, adding louvers to the hood can reduce the heat in the engine compartment by as much as 40* (note that this is engine compartment temp, not actual engine temp!), which is a good thing because there will be less damage to plastic parts due to heat, and also because the air coming into the engine will be colder. And of course, there is the looks issue, which I think they look pretty cool (some of you may disagree, but personally I like them).
So now I am thinking about adding a set to my Jeep, since once I take it down to Panama, 90* days are the average there, and high temps rule year round.
But I am worried about 2 things, and would like your opinion on the subject:
1. Could rain fall coming in through the louvers once the Jeep is parked be a reason for concearn? I dont think so, because so much water splashes UP from the tires when it rains that it gets wet in there anyway, but just in case... (by the way, I would obviously install it away from the battery and fuse box, but it would probably be right over the ARB compressor if I install it on the outside of the hood, or the alternator if I go inside)
2. when crossing rivers, the "bubble" effect would be less, so more water would come through the radiator and in to the engine compartment; again, is this something I should be concearned with?
Your thoughts are appreciated!
Felipe
-
I don't think you should be concerned with any of those things...like you said, the bottom and most of the side is already open or partially open. No bubble effect in my book.
-
Are you having heating issues? I've had my Jeep in 90% humidity with temps in the 90's as well as humidity in the low teens and the temp over 100 and have no issues. :confused:
-
Are you having heating issues? I've had my Jeep in 90% humidity with temps in the 90's as well as humidity in the low teens and the temp over 100 and have no issues. :confused:
Engine temp is fine; but the engine compartment is getting a bit too hot. Plus, I like the look of the louvers... Yeah, I know... Stupid reason to ad them, but I like the look.
-
Laurie's one smart cookie...and drive's her Jeep in Oman...check her site out.
http://www.oman4x4.com/hoodvents.htm (http://www.oman4x4.com/hoodvents.htm)
-
Engine temp is fine; but the engine compartment is getting a bit too hot. Plus, I like the look of the louvers... Yeah, I know... Stupid reason to ad them, but I like the look.
So, really this is about looks then anything else. :lol:
-
Hey you gotta look cool to get the chicks man :smokes:
-
Laurie's one smart cookie...and drive's her Jeep in Oman...check her site out.
http://www.oman4x4.com/hoodvents.htm (http://www.oman4x4.com/hoodvents.htm)
Pretty impressive testing!
-
So, really this is about looks then anything else. :lol:
So, really this is about looks then anything else. :lol:
Hey you gotta look cool to get the chicks man :smokes:
You got it!
Laurie's one smart cookie...and drive's her Jeep in Oman...check her site out.
http://www.oman4x4.com/hoodvents.htm (http://www.oman4x4.com/hoodvents.htm)
That's where I got the original idea from; I found a couple of those Pontiac louvers on eBay, but I figured aluminum should be better than plastic, so I am now looking at the GenRight louvers...
Honestly speaking, there is A LOT of heat in the engine compartmet; if you can really lower that by 40*, theoretically, that would be similar to isntalling a CAI intake (as the air would be colder). Combine that with the durability of the components as they are now exposed to less heat, and its a win/win situation (looks cool and helps a little!).
-
If you really want it to help you need a place for the air to escape.
These look pretty bad, but would provide a lot more cooling:
http://www.idealoffroad.com/shop/product.asp?p=217
(http://www.deepvoodoo.net/catalog/gasskid/GenRite/Louver_5pc_3.jpg)
I think this one looks a bit better but a lot more $$
http://www.atozfabrication.com/catalog/19972003jeepwranglertjcyclonelouveredhoodinsert-p-181.html?zenid=b02bc6d67a33762c93c92507a1bdab0a
-
Well, if you look at the site Moz posted, Frank D. did his homework; this is the high temp areas UNDER the hood of a 4.0L TJ:
(http://www.oman4x4.com/frank/hoodtemp.jpg)
This is the low pressure areas on TOP of the hood (@25mph):
(http://www.oman4x4.com/frank/hoodpresr.jpg)
And this is the overlay of both graphs:
(http://www.oman4x4.com/frank/hood2.jpg)
So by using the vents where there is heat below the hood and where the Jeep's aerodynamics pull the air from the engine compartment, you can get a lot of air moved through a relatively small hole. Granted, when you are wheeling at very slow speed, the air will not circulate as good (although it would still be better than nothing), so the temp drop will not be so dramatic (although still it is good)...
So, based on this, I am thinking about doing only the ones on the sides.
With the Pontiac louvers, Frank D. got the following drops in temp:
11 degrees F at Idle.
16 degrees F during Stop and Go
27 degrees F during Highway Travel
So it seems it defenetly works... And you dont need half a million holes (or spend $100 or more) to achieve a drop in temp... I dont know how much temperature drop on the intake you get with a CAI, but 27 degrees HAS to make a difference!
I AM thinking about getting the louvers lined (along with the CB antena mount, which is starting to rust, and the vent grill already on the hood, which I also got a metal one some years ago and is also starting to rust) to match the bumper finish, but I have not decided on that yet...
-
Just realize that his diagrams are only relevant to a jeep with the same amount of lift and front bumper combo.
-
Just realize that his diagrams are only relevant to a jeep with the same amount of lift and front bumper combo.
I thought about that, but the effect of the bumper is negligeable; the whinch would affect more the airflow through the radiator, which would also affect the airflow inside the engine. The lift does affect, but from what I could see in the pictures, I would guess he's either running 33" or 35" tires, which would mean he is areoun d what I will have. What worries me more is the fact that he has the I6 and I have the I4 with the e-fan, which means that there is a big distribution difference inside the engine compartment, which WILL affect airflow, and thus the hot pockets. But the aerodynamics should be about the same on the outside, so the Jeep should still be pulling a vacuum at about the same spot. I do plan to use a video camera and some yarn to double check, but I would doubt there will be any differences...
-
He's also got a TJ ;)
-
Some XJ owners put a small electic extractor fan right over the engine. One local jeeper put one on his YJ after swapping in a V8. It helped a lot with the cooling, very likely more than louvers.
-
Some XJ owners put a small electic extractor fan right over the engine. One local jeeper put one on his YJ after swapping in a V8. It helped a lot with the cooling, very likely more than louvers.
XJ's especially the earlier ones have marginal cooling from the factory. It shouldn't really be an issue with a YJ though. Add some tube fenders and you shouldn't have any worries since there are no inner wheel wells. :thumb:
-
Add a 4 cyclinder and you can cut the Heat by a 1/3 8)
-
(http://i30.photobucket.com/albums/c331/FourbangerYJ/April3008080.jpg)
(http://i30.photobucket.com/albums/c331/FourbangerYJ/April3008081.jpg)
I went this route. I didn't have a overheating issue. I was bored and wanted a easy project.
I picked up a 2 X 4 piece of the 1/8 inch holed steel for $7.00. I used some double sided tape to hold it on.
-
Buick Roadmaster or holl drill that hasn't been used since the taillights... :lol:
-
I went this route. I didn't have a overheating issue. I was bored and wanted a easy project.
I picked up a 2 X 4 piece of the 1/8 inch holed steel for $7.00. I used some double sided tape to hold it on.
I think that my favirite thing are your stickers!
Fool injected! 4 Squirrels Inside! :roflol:
-
Buick Roadmaster or holl drill that hasn't been used since the taillights... :lol:
I get the Buick comment alot! When you stand back a few feet they look like stickers.
I used a jig saw to cut my tail lights :blbl:
-
I get the Buick comment alot! When you stand back a few feet they look like stickers.
I used a jig saw to cut my tail lights :blbl:
3M foam tape?
Those MTR's are really chewed up.
BTW: what rocker guards are those? DIY?
-
It is 3M tape. I got it at Lowes. It's super sticky! I guess it does have a foam center. Maybe 1/16 thick 1 inch wide.
The MT/R's I got used. They were already siped. After running them a few years I grooved them. It's hard to see in that PIC. I sold the tires and wheels when I went to 37's. Which I bought used. I grooved them too. I don't have a PIC yet. I like the way they hook up!
Rockers are some Blem Genright. They are just down the street from me. I did have some homebrew ones on before that though.
-
Add some tube fenders and you shouldn't have any worries since there are no inner wheel wells. :thumb:
mmm muddy water cooling system...
-
mmm muddy water cooling system...
Not like the inner fenders are going to keep the engine that much cleaner.
-
Well, just thought I'd let everyone know I ended up getting the Pontiac louvers (like the ones in the article Moz posted). I'll get some pictures after I install them...
-
my 79CJ with the 401 HiPerf Turbo charged motor used to create a lot of heat.. I took it to a hot rodder friend that had a louver machine.. he punched louvers in the back edge of the hood to let the heat accumulated out.. I had the hood all repainted.. looks much better than those bolt in units.. classier for sure.. I put pans under them for the drain off so the water didn't dump on my engine..
-
i have seen that article before and i like that someone did that good of research before a mod that most would just stick where ever looked the best, on the other side i don't think with the e fan and a four cylinder you have much to gain in temp drop considered that combo creates a massive hole in the front anyway but i guess as far as heat escape it may help some, but i would just brake them anyway considering i walk across my hood when in deep mud and have to hook up or operate my winch
-
on the other side i don't think with the e fan and a four cylinder you have much to gain in temp drop considered that combo creates a massive hole in the front anyway but i guess as far as heat escape it may help some
I would think it would help quite a bit, as when I open the hood, I can feel the heat coming out. Also, when the fan kicks in, I can feel the hot air coming out from UNDER the Jeep... I have yet to install them (same with the Safari Snorkel), though, so I have no idea if they will help or not.
-
I would think it would help quite a bit, as when I open the hood, I can feel the heat coming out. Also, when the fan kicks in, I can feel the hot air coming out from UNDER the Jeep... I have yet to install them (same with the Safari Snorkel), though, so I have no idea if they will help or not.
Post pics when you get them installed. I've been thinking of doing this for some time. Maybe when the temps get a bit warmer (low single digits coming this week) I'll head over to the scrap yard and look for a set myself.
-
well let us know if it turns out to help or not, i'm sure it will help a little just curious if it helps enough to make it worth the effort
-
well, I FINALLY got around to doing this; I got one in and tomorrow the other will go in. So far so good. I like how it looks, although I have done noe heat tests at this time (and I have no pics cause it was nighttime when I finished and I did not have my camera). I'll post some pics when I'm done...
-
Here are the pictures...
(http://i46.photobucket.com/albums/f138/jfrabat/Jeep/DSC00096.jpg)
(http://i46.photobucket.com/albums/f138/jfrabat/Jeep/DSC00091.jpg)
(http://i46.photobucket.com/albums/f138/jfrabat/Jeep/DSC00089.jpg)
(http://i46.photobucket.com/albums/f138/jfrabat/Jeep/DSC00088.jpg)
(http://i46.photobucket.com/albums/f138/jfrabat/Jeep/DSC00092.jpg)
(http://i46.photobucket.com/albums/f138/jfrabat/Jeep/DSC00098.jpg)
I painted the louvers in Duplicolor's textured black, and I really like how they turned out... I also painted the plastic cover for the air intake for the heater in the same color so they would match (I had replaced the plastic one with a metal one because the plastic one looked pretty worn out, but the metal one was rusting, so I replaced it with the painted plastic one again).
As for how they work, I have no way of measuring the engine compartment temp, but let me tell you, you can actually see the hot air coming out of the things!
Felipe
-
Well, you've just inspired me to do mine...
Very nice, indeed.
-
I like what you've done there :thumb:
I think that my favirite thing are your stickers!
Fool injected! 4 Squirrels Inside! :roflol:
X2
-
Those vents look good Felipe. They're an example of form-following-function compared to the bogus vents/scoops/doo-dads that are on most modern cars/trucks . Maybe it'll help your underhood intake temperatures too.
If I lived in the desert over here in the west, I'd probably follow on and do a little hood vent surgery myself :biggrin: I'd probably go the green body color with the hood vent and 2 new vents, but that's just me.
-
They look really good. I have been debating adding louvers to mine and I think I will qfter seeing yours.
-
Boy...really surprised at how much they look like they were made for the Jeep hood. Nice work. :thumbsup:
-
Boy...really surprised at how much they look like they were made for the Jeep hood. Nice work. :thumbsup:
X2
Also, I see your hood has the same two 'my hood flew off the prop on a windy day' dents that mine does :'( I wander how many are in the same boat?
-
Also, I see your hood has the same two 'my hood flew off the prop on a windy day' dents that mine does :'( I wander how many are in the same boat?
Actually, those are my "my hood popped open when I crossed the railroad tracks doing 40 mph and I almost SH#$ my pants when it happened" marks...
-
When ever I go pass on comming semis the hood tries to do that. It's tryin.
-
When ever I go pass on comming semis the hood tries to do that. It's tryin.
X2...Pucker moment every time :eek:
-
I'm getting ready to add louvers to mine. I just got back from moab last weekend and in the roasting dessert heat i could have fried breakfast on my hood. And shortly after i started to see a slight engine temp increase. So for the rock crawlers its a great idea. Just as a side note i have tube fenders that I made myself so they dont have inner fender wells and i was still heating up. It's that whole wierd physics thing that heat rises. :fish: