Vented Hoods

MikenMel said:
https://photos.app.goo.gl/aon2JhvSxRYDMzWk7

I put these on to help increase the flow of air through the grill as the winch and grill insert reduced the flow to much and caused the motor to run hot. Since putting them in, the temp has definitely been more consistent.
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Those louvres will certainly help lots!
Do you ever look across your hood at idle on hot days and see heat waves escaping ?
 
Haven't actual seen any heat waves while we are driving, but putting a hand over them you can definitely feel the heat escaping.
 
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Maybe just put a fan in, that would suck out the heat.
hood fan.jpg
 
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I added the Poison Spyder louvers this summer, because of heat issues I was having, but not with my engine. Last summer I drove 6 hours to a trail ride, and burned my feet with all the heat coming up around the transmission well. On any long drive, I could notice a significant amount of heat buildup around my feet. After cutting and adding the ps louvers, that heat is greatly dissipated, and I barely noticed it on a 4 hour drive to a trail system. I really can't speak to engine bay temps, but I can tell there is some serious heat dissipation in these things.
 
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Liberated said:
I added the Poison Spyder louvers this summer, because of heat issues I was having, but not with my engine. Last summer I drove 6 hours to a trail ride, and burned my feet with all the heat coming up around the transmission well. On any long drive, I could notice a significant amount of heat buildup around my feet. After cutting and adding the ps louvers, that heat is greatly dissipated, and I barely noticed it on a 4 hour drive to a trail system. I really can't speak to engine bay temps, but I can tell there is some serious heat dissipation in these things.
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Liberated can I ask where you got the lineman tail light cover?
 
Let me start by saying that I have no experience with a vented hood on a jeep, but I do have experience with a vented hood on a different vehicle (Toyota Tacoma). I just want to share my findings with you.

Due to the nature of my work, I have access to really good infrared cameras. We took pictures at some point years ago of the heat distribution under the tacoma's hood before and after the cutting of the hood. The results were surprising. It turned out that we messed up the entire cooling flow and made it worse. The engine ran considerably hotter instead of cooler because of the flow pattern change. I hope the Jeeps are not as touchy because apparently the toyota's are and those folks do some serious calculations and research before designing the system, so no messing with it.

I would be curious to see before and after pictures of the wrangler's hood if anyone has access to a FLIR camera.

Cheers
 
Tigerman said:
Let me start by saying that I have no experience with a vented hood on a jeep, but I do have experience with a vented hood on a different vehicle (Toyota Tacoma). I just want to share my findings with you.

Due to the nature of my work, I have access to really good infrared cameras. We took pictures at some point years ago of the heat distribution under the tacoma's hood before and after the cutting of the hood. The results were surprising. It turned out that we messed up the entire cooling flow and made it worse. The engine ran considerably hotter instead of cooler because of the flow pattern change. I hope the Jeeps are not as touchy because apparently the toyota's are and those folks do some serious calculations and research before designing the system, so no messing with it.

I would be curious to see before and after pictures of the wrangler's hood if anyone has access to a FLIR camera.

Cheers
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What did the temp gauge say?

On my TJ with both cowl induction and hood vents, the temp gauge and ODBII reading showed a significant decrease in temps, to the point that I needed to move to a 205* t-stat in order to raise the floor of the temperature range.
 
jjvw said:
What did the temp gauge say?

On my TJ with both cowl induction and hood vents, the temp gauge and ODBII reading showed a significant decrease in temps, to the point that I needed to move to a 205* t-stat in order to raise the floor of the temperature range.
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I truly do not remember. It was a few years back. I will go home and check my external drive for the thermal pictures later on today. If they still exists, will post.
 
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jjvw said:
What did the temp gauge say?

On my TJ with both cowl induction and hood vents, the temp gauge and ODBII reading showed a significant decrease in temps, to the point that I needed to move to a 205* t-stat in order to raise the floor of the temperature range.
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You installed hood vents and then found you needed to install a higher temperature thermostat to get the engine back up to its normal temperature? Is that to say you figured out the hood vents weren't really a good idea?

I wheel in the desert, so do a lot of us here in SoCal, yet I can't remember the last TJ I saw that needed hood vents for any real reason other than likely their looks. Not to mention when it rains electrical connectors, sensors, etc. in the engine compartment get really wet and that can cause problems.
 
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Jerry Bransford said:
You installed hood vents and then found you needed to install a higher temperature thermostat to get the engine back up to its normal temperature? Is that to say you figured out the hood vents weren't really a good idea?

I wheel in the desert, so do a lot of us here in SoCal, yet I can't remember the last TJ I saw that needed hood vents for any real reason other than likely looks.
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I get what you are saying, but I won't go so far as to say that they were a bad idea or a mistake. I never installed mine with the intention of addressing some kind of cooling issue, nor were they entirely for looks.
 
jjvw said:
I get what you are saying, but I won't go so far as to say that they were a bad idea or a mistake. I never installed mine with the intention of addressing some kind of cooling issue, nor were they entirely for looks.
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What was the main purpose then? I'm definitely not trying to pick an argument here, just curious. :)
 
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