hood hack
05-18-2009, 08:11 PM
#34
ok hijackers......back on topic....i'm cutting my hood and installing vents with the intent to:
a. get better air flow in there
b. keep the engine compartment cooler (nope, not over heating, i just WANT TO)
and
c. Look bad ass
anybody have any ideas on the best way to DO THIS?
p.s. I have a CAI, it made my jeep have more pep.
If you disagree with this you can argue till your face turns blue.
I drove my Jeep before and after so i'm pretty sure I would know.
a. get better air flow in there
b. keep the engine compartment cooler (nope, not over heating, i just WANT TO)
and
c. Look bad ass
anybody have any ideas on the best way to DO THIS?
p.s. I have a CAI, it made my jeep have more pep.
If you disagree with this you can argue till your face turns blue.
I drove my Jeep before and after so i'm pretty sure I would know.
05-18-2009, 08:18 PM
#35
JK Freak
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I installed an S&B intake last year.(I won't call it a "Cold Air" intake because those words seem to get everyone's little pink panties in a wad.) I did a very unscientific test to see if the air was any cooler between the factory box and aftermarket box. I used an indoor/outdoor thermometer and put the remote sensor in the box. After getting the engine warmed up, I went for a ride. The temp in the box varied depending on the speed I was going but was usually around 20 to 30 degrees hotter than the outside temp.
I did the same thing after putting on the S&B and the box temp ran about 10 to 15 degrees cooler than the factory box.
So after looking at both boxes, I came up with my conclusion. If you look at the factory box, the air intake sits against the top of the hood. And when the engine heats up, where does the heat go; it rises and sits under the hood. My aftermarket intake has the hole in the side of the box facing the fender. So in addition to not sucking in air that is sitting against the hood, it has better access to air coming up from beside the fender.
I did the same thing after putting on the S&B and the box temp ran about 10 to 15 degrees cooler than the factory box.
So after looking at both boxes, I came up with my conclusion. If you look at the factory box, the air intake sits against the top of the hood. And when the engine heats up, where does the heat go; it rises and sits under the hood. My aftermarket intake has the hole in the side of the box facing the fender. So in addition to not sucking in air that is sitting against the hood, it has better access to air coming up from beside the fender.
05-18-2009, 09:18 PM
#36
JK Enthusiast
Join Date: Apr 2007
Location: San Lorenzo CA 94580
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ok hijackers......back on topic....i'm cutting my hood and installing vents with the intent to:
a. get better air flow in there
b. keep the engine compartment cooler (nope, not over heating, i just WANT TO)
and
c. Look bad ass
anybody have any ideas on the best way to DO THIS?
p.s. I have a CAI, it made my jeep have more pep.
If you disagree with this you can argue till your face turns blue.
I drove my Jeep before and after so i'm pretty sure I would know.
a. get better air flow in there
b. keep the engine compartment cooler (nope, not over heating, i just WANT TO)
and
c. Look bad ass
anybody have any ideas on the best way to DO THIS?
p.s. I have a CAI, it made my jeep have more pep.
If you disagree with this you can argue till your face turns blue.
I drove my Jeep before and after so i'm pretty sure I would know.
Back on topic. Awhile ago I was looking into what you are talking about. What I did find on a boat supply site was all sorts of vents. The one that interested me was one that was about 3x12 that would fit nicely along the sides of the hood (where the sticker is). I figure putting it here would vent the engine bay, and being almost vertical it would limit the amount of rain and such from falling into the engine compartment. I also looked into some high volume electric fans that could be mounted near the wheel wells, somewhere around the headers. Some of these fans which are quite small move in excess of 300 cfm. What might work is a combination of the 2. A small vent that was hooked to a fan. Just some food for thought. Sorry if I hijacked.
05-18-2009, 10:00 PM
#37
JK Enthusiast
Join Date: Sep 2008
Location: Toronto, Ontario
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I'm thinking about hood vents as well.
Anyone else notice on cooler days that when you come to a stop after driving for a bit that you can actually see steam coming out the front grille of the JK?
I have owned Jeeps since I was 16 and I have never seen that before....
Anyone else notice on cooler days that when you come to a stop after driving for a bit that you can actually see steam coming out the front grille of the JK?
I have owned Jeeps since I was 16 and I have never seen that before....
05-18-2009, 10:01 PM
#38
JK Super Freak
Join Date: May 2008
Location: Grand Junction, CO
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OK, the recipe to reduce under hood heat.
2 bottles Redline WaterWetter
Black Satin coating for exhaust manifold or headers.
180 degree T-stat and programmer to kick the fan on under 200 degrees.
Before you even get to a vented heat reduction hood you've reduced your under hood heat by 20-30 degrees.
2 bottles Redline WaterWetter
Black Satin coating for exhaust manifold or headers.
180 degree T-stat and programmer to kick the fan on under 200 degrees.
Before you even get to a vented heat reduction hood you've reduced your under hood heat by 20-30 degrees.
A 180 degree thermostat has been discussed before; I think it was pointed out that Autozone stocked on for the JK. But at that time nobody said that they had been running it. There was some concern about how it would affect the computer management of the engine. Have you used one in a JK (I've used a 180, and 165 for that matter, in plenty of other vehicles) and if so what did you notice? If using one can accomplish a 15 degree drop (in conjunction with a change of fan speed settings) with no bad effects I'll happily buy one.
05-18-2009, 10:47 PM
#39
JK Enthusiast
Join Date: Feb 2008
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I vented my Cherokee by cutting six 3" holes (three in a row per side) near the center of the hood and then covering them with reversed hood scoops. The scoops had small lips below the opening to direct water away. It was amazing how much cooler the XJ ran. I'm thinking of doing something similar to my JK, but haven't worked up the nerve yet.
05-18-2009, 11:00 PM
#40
JK Enthusiast
http://www.go.jeep-xj.info/HowtoBonnetVents.htm
This site is for XJ but a lot of topics for all.
http://www.go.jeep-xj.info/
This site is for XJ but a lot of topics for all.
http://www.go.jeep-xj.info/