Just another LJ build - Page 242 - JeepForum.com

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post #3616 of 4127 Old 07-24-2014, 08:18 PM
JJeeper09
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I've never had a problem with my jeep overheating, but when I pop the good after a short drive it's hott. Looking forward to this Greg



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post #3617 of 4127 Old 07-24-2014, 08:20 PM Thread Starter
G Beasley
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I've never had a problem with my jeep overheating, but when I pop the good after a short drive it's hott. Looking forward to this Greg
My temps will creep up , and the hood is HOT after a long run but it doesnt run hot . I hope to see a good drop after this weekends install .

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post #3618 of 4127 Old 07-24-2014, 09:05 PM
bobthetj03
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My overflow bottle boils when the temps are 90+ on a trail run. Don't notice it until I turn the engine off. Gauge stays just slightly above 210 even with the AC blasting.

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post #3619 of 4127 Old 07-25-2014, 08:44 AM
dayriesw
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Originally Posted by G Beasley View Post
I am going to place three on the front of the drivers side inner fender and three on the rear of the passenger side fender . I hope to get a cross flow that will pull some heat from under the hood . I call it the Art effect . I do plan on checking the differences with a thermal laser to see if it makes a difference .
G, I have done louvers on 2 jeeps now and checked both with heat lasers. It is a matter of a few degrees... which to me is not worth it. Removing inner fenders is another hand but louvers are really not worth it to me these days. If I ever do make some inners, I will put louvers in. I know that didnt make a lot of sense but it is for piece of mine, I guess.

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post #3620 of 4127 Old 07-26-2014, 07:53 AM Thread Starter
G Beasley
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G, I have done louvers on 2 jeeps now and checked both with heat lasers. It is a matter of a few degrees... which to me is not worth it. Removing inner fenders is another hand but louvers are really not worth it to me these days. If I ever do make some inners, I will put louvers in. I know that didnt make a lot of sense but it is for piece of mine, I guess.
I think the inner fender louvers will have to make some difference . Even a few degrees here and there will help .

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post #3621 of 4127 Old 07-26-2014, 10:21 AM
Sundowner
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Originally Posted by G Beasley View Post

I think the inner fender louvers will have to make some difference . Even a few degrees here and there will help .
I don't agree; there's a MASSIVE amount of airspace that's available below/around the engine, and the hood louver makes use of it... which makes an inner fender louver pointless. You'd be better to push the heat on through to the exhaust; grab a cheap stock manifold, clean it, and have it ceramic coated.

If it's worth doing, then it's worth overdoing.

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post #3622 of 4127 Old 07-26-2014, 03:51 PM Thread Starter
G Beasley
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I don't agree; there's a MASSIVE amount of airspace that's available below/around the engine, and the hood louver makes use of it... which makes an inner fender louver pointless. You'd be better to push the heat on through to the exhaust; grab a cheap stock manifold, clean it, and have it ceramic coated.
I like the ceramic coated manifold , that might help out a good bit ? I had considered header wrap too as that helped me out on my old CJ7 that had a SBC that liked to burn up plug wires .

We will see what the inner fender louver will do as I am going to pick 4 spots on the hood to measure temperatures from as I go forward . This will give me a base to work from and compare the results too .

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post #3623 of 4127 Old 07-26-2014, 05:21 PM
Sundowner
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Originally Posted by G Beasley View Post

I like the ceramic coated manifold , that might help out a good bit ? I had considered header wrap too as that helped me out on my old CJ7 that had a SBC that liked to burn up plug wires .

We will see what the inner fender louver will do as I am going to pick 4 spots on the hood to measure temperatures from as I go forward . This will give me a base to work from and compare the results too .
How much area will the louver open up, and what percentage increase is it over the amount of space that's already allowing air passage? Figuring out those numbers will give you a theoretical idea of the effect before you slice the metal.

If it's worth doing, then it's worth overdoing.

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post #3624 of 4127 Old 07-27-2014, 08:26 AM Thread Starter
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How much area will the louver open up, and what percentage increase is it over the amount of space that's already allowing air passage? Figuring out those numbers will give you a theoretical idea of the effect before you slice the metal.
My theory is that the cross flow will be what makes the difference plus I am going to attempt to direct the air with an inner deflector . As to figuring it out before hand , wheres the fun in that ?

From here forward I will measure the temperatures at the four points on the drawing with the laser thermometer .

I measured it before I drove it this afternoon and no surprise the temps were about the same as the outside temps.

1-85.2
2-85.2
3-85.2
4-85.2

Then I went for a pretty mellow drive for 15 minutes and measured it again .

1-96.8
2-101.3
3-103.2
4-102.1

The temps were higher , but not out of this world . I will take it on a longer , higher speed drive tomorrow and see what the temps get up to before I start cutting holes .



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post #3625 of 4127 Old 07-27-2014, 07:52 PM
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Speaking of going for a drive, consider yourself fortunate that you do not live by Summit Racing.
Bought LJ some goodies today.

Derale TJ Transmission cooler
Perma cool inline thermostat so I don't over cool transmission
Perma cool External transmission filter
Perma Cool oil filter relocation kit.
I got off cheap $510 since I learned my lesson with the 42 series transmission.

I need to go by the Parker store and get some lines made up along with some kevlar sleeving.
Hey it was either that or I went to Wellsville and broke a bunch of stuff.

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post #3626 of 4127 Old 07-27-2014, 08:14 PM
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BTW I was looking at the scratch and dent table and there was a ton of Mosler axles fo D44 for next to nothing.

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post #3627 of 4127 Old 07-27-2014, 10:10 PM
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Quote:
Originally Posted by Sundowner View Post
I don't agree; there's a MASSIVE amount of airspace that's available below/around the engine, and the hood louver makes use of it... which makes an inner fender louver pointless. You'd be better to push the heat on through to the exhaust; grab a cheap stock manifold, clean it, and have it ceramic coated.
Heat rises, ever hang out in the attic in summer? That said the driving wind and the fan will push some got air out but will leave very large hot air pockets under the hood. Both my Jeeps will push out massive amounts of hot air out through the fenderwells. How do I know? With the doors of a ton of it comes into the cab when crawling. During highway or city driving it isn't an issue though.

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post #3628 of 4127 Old 07-28-2014, 07:24 AM
Sundowner
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Heat rises, ever hang out in the attic in summer? That said the driving wind and the fan will push some got air out but will leave very large hot air pockets under the hood. Both my Jeeps will push out massive amounts of hot air out through the fenderwells. How do I know? With the doors of a ton of it comes into the cab when crawling. During highway or city driving it isn't an issue though.
Yeah, heat rises... which is why the hood louver makes sense. I can't see the inner fender louvers making much difference after a louvered hood goes on, though.

If it's worth doing, then it's worth overdoing.

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post #3629 of 4127 Old 07-28-2014, 02:09 PM
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Quote:
Originally Posted by Sundowner View Post
Yeah, heat rises... which is why the hood louver makes sense.
Hey this kind of info needs to be posted in hardcore tech

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post #3630 of 4127 Old 07-28-2014, 02:38 PM
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I might have something to add to this but nothing as scientific as measuring heat with a heat gun. As yall know, the inner fenders on my jeep are gone. I was doing some under hood measuring for a new set of inners this weekend after driving around town for a while. The top of the glass hood was super hot, the sides were breathing out heat, but it wasnt cool until I opened the heat and it went away. Thus proving, heat rises.

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