Fabrication & builders section. All fabrication posts go here.
XJ/MJ/ZJ/WJ Only projects go here. Questions belong in modified tech.
View Poll Results: what do you guys think
looks good
40
95.24%
no good
2
4.76%
Voters: 42. You may not vote on this poll

another hood vent project.

Thread Tools
 
Search this Thread
 
Old Aug 4, 2010 | 10:11 PM
  #16  
Pa XJ's Avatar
Junior Member
 
Joined: May 2010
Posts: 64
Likes: 0
From: Barnesville, PA
Year: 90
Model: Cherokee
Engine: 4.0
Default

Originally Posted by phillyxj570
here is a pic from under the hood.
Attachment 23521

not really if u look and phillys underhood shot you will see that if placed it right spot you will not be cutting into the hood braces, and that is what really gives a hood its rigidity
Reply
Old Aug 4, 2010 | 10:30 PM
  #17  
ChileRedBateman's Avatar
Member
 
Joined: May 2010
Posts: 182
Likes: 0
From: Concord, NH
Year: 1998
Model: Cherokee
Engine: 4.0L
Default

Originally Posted by winston427
I have not had the guts to chop a hood to install this one yet. Mainly because of the size of the hole needed and the structural stength loss that will happen by cutting that much sheet metal out. It will take some planning and fab work to regain the hoods strength. It is from a mid 80s Dodge Daytona turbo.

Attachment 23562
DO IT!! not fully sure but that looks like it would fit, maybe a tiny bit of trimming to the braces but seems good.

and to the OP, those look great, time for me to go hunting at the JY
Reply
Old Aug 5, 2010 | 01:49 PM
  #18  
phillyxj570's Avatar
Thread Starter
CF Veteran
 
Joined: Mar 2010
Posts: 1,200
Likes: 0
From: wilkes barre PA.
Year: 96
Model: Cherokee
Engine: 6 cylinder
Default

you should be able to just cut that out without hitting any supports...so you dont have to worry about losing strength in your hood...and i too was scared at first for a bout the first half hour i kept finding stupid things to do because i was afraid to make the first cut...once the first cut is made the fear goes rights out the window....and thanks to everyone that commented on my vents

Last edited by phillyxj570; Aug 5, 2010 at 01:51 PM.
Reply
Old Aug 6, 2010 | 04:16 PM
  #19  
Lil Jeepers's Avatar
Newbie
 
Joined: Oct 2009
Posts: 26
Likes: 0
From: Lakewood, WA
Year: 1987
Model: Cherokee
Engine: 4.0L
Default nice

I have the same daytona turbo vent. Got it at jy for $12.00. What I want to do mount it is get a second hood skin and dome it. So it will be like 3" higher than the rest of the hood. Then cut and mount. I will post when I get started on it. Might have pictures, someone stole my digital camera.
Reply
Old Aug 7, 2010 | 10:03 AM
  #20  
phillyxj570's Avatar
Thread Starter
CF Veteran
 
Joined: Mar 2010
Posts: 1,200
Likes: 0
From: wilkes barre PA.
Year: 96
Model: Cherokee
Engine: 6 cylinder
Default

yea i want to see it when you get it done so definitely try to get pics up
Reply
Old Aug 7, 2010 | 08:10 PM
  #21  
mayko's Avatar
Member
 
Joined: Nov 2009
Posts: 135
Likes: 0
Year: 1995
Model: Cherokee
Engine: 4.0 HO
Default

did the same thing






temp have been down alot and whats good about this is when ur stuck in traffic the rad fan pushes air out of the front vents so air is coming in and out everytime.
Reply
Old Aug 31, 2010 | 08:39 PM
  #22  
90xj,99xj,92mj's Avatar
Seasoned Member
 
Joined: Aug 2010
Posts: 462
Likes: 1
From: salt lake city, utah
Year: 1990
Model: Cherokee
Engine: 4.0
Default

mayko i like those where did you get them?
Reply
Old Dec 22, 2010 | 01:48 AM
  #23  
BajaCrawler's Avatar
Seasoned Member
 
Joined: Nov 2009
Posts: 400
Likes: 0
From: Browns Valley/Grass Valley, CA
Year: 1994
Model: Cherokee
Engine: 98 4.0 swap
Default

you know i wanna do vents on mine as well but for some reason my temp stays way low on my 89. its got the open system conversion done but still stays way down. except for one time tryin to tow some toyota out of the mud. that time it hate life so idk what i wanna do. any suggestions?
Reply
Old Dec 22, 2010 | 03:06 AM
  #24  
ProudXjOwner's Avatar
Seasoned Member
 
Joined: Sep 2010
Posts: 440
Likes: 0
From: Akron, OH
Year: 1993
Model: Cherokee
Engine: 4.0 HO
Default

I personally think they look good and serve a very good purpose as well.
Reply
Old Dec 22, 2010 | 01:12 PM
  #25  
BajaCrawler's Avatar
Seasoned Member
 
Joined: Nov 2009
Posts: 400
Likes: 0
From: Browns Valley/Grass Valley, CA
Year: 1994
Model: Cherokee
Engine: 98 4.0 swap
Default

I'll probably do them just for the sake of never overheating, along with dual electric fans.
Reply
Old Dec 30, 2010 | 12:50 PM
  #26  
Zreiser's Avatar
Junior Member
 
Joined: Apr 2010
Posts: 54
Likes: 0
From: Salt Lake City
Year: 1988
Model: Cherokee
Engine: 4.0 L
Default

Originally Posted by mcnslayer
ok first off just wana say I really like the way this looks.SRRY if i sound like a hater. I really want to do this but im not shure if its worth it. Now for the questions as far as under hood temps go have you seen a difrence?
Also with the drip pans on wouldnt it pretty much not allow allot of heat to escape.......making this just a cosmetic upgrade.

If the vents were fliped 180* would that force air under the hood to cool the engine bay.

again im not hating just curious and think its a great idea
Sorry to have to contradict you, and although it's counter-intuitive, forcing air in through the top of the engine to cool it won't work in a Jeep. First, the engine is too high off the ground. When moving, air acts like any other fluid (like water, which is why they use water in aerodynamic testing). As a fluid it's going to seek the path of least resistance, so the majority of the airflow over your engine is from the bottom up. Thats why having the vents facing (correctly) with the opening towards the windscreen helps more. The air rushing up under your engine bay travels over the engine, and is pulled out through the vents similar to a chimney stack, as there's a small pocket of low pressure air created just behind the vent openings due to their angle. Air likes to flow from high pressure to low pressure, so that draws the cooler air from the ground up through the engine bay, where it heats up, and out through the low pressure vents.
Now that being said, it does work the way you described in a very low suspension racer...say a Lamborghini, where they have worked the aerodynamics so finely so as to almost eliminate any air travelling under the car at all, and the air flows so smoothly over the body of the car that they have to interrupt it with 'backwards' vents to get it into the engine at all.
Just my 2 cents worth! LOL
Reply
Old Jan 4, 2011 | 09:42 PM
  #27  
Seionareese's Avatar
Member
 
Joined: Nov 2010
Posts: 122
Likes: 0
From: Albuquerque
Year: 1989
Model: Cherokee
Engine: 4L 6-Cyl.
Default

Originally Posted by Zreiser
Sorry to have to contradict you, and although it's counter-intuitive, forcing air in through the top of the engine to cool it won't work in a Jeep. First, the engine is too high off the ground. When moving, air acts like any other fluid (like water, which is why they use water in aerodynamic testing). As a fluid it's going to seek the path of least resistance, so the majority of the airflow over your engine is from the bottom up. Thats why having the vents facing (correctly) with the opening towards the windscreen helps more. The air rushing up under your engine bay travels over the engine, and is pulled out through the vents similar to a chimney stack, as there's a small pocket of low pressure air created just behind the vent openings due to their angle. Air likes to flow from high pressure to low pressure, so that draws the cooler air from the ground up through the engine bay, where it heats up, and out through the low pressure vents.
Now that being said, it does work the way you described in a very low suspension racer...say a Lamborghini, where they have worked the aerodynamics so finely so as to almost eliminate any air travelling under the car at all, and the air flows so smoothly over the body of the car that they have to interrupt it with 'backwards' vents to get it into the engine at all.
Just my 2 cents worth! LOL
Well said. I say it is for purely for cosmetics.
Reply
Old Jan 5, 2011 | 12:30 PM
  #28  
mayko's Avatar
Member
 
Joined: Nov 2009
Posts: 135
Likes: 0
Year: 1995
Model: Cherokee
Engine: 4.0 HO
Default

sorry ebay. i think it was like 10 bucks.
Reply
Old Jan 5, 2011 | 01:04 PM
  #29  
phillyxj570's Avatar
Thread Starter
CF Veteran
 
Joined: Mar 2010
Posts: 1,200
Likes: 0
From: wilkes barre PA.
Year: 96
Model: Cherokee
Engine: 6 cylinder
Default

My vents are facing the windshield to let heat out. When I'm at crawling speeds in the woods you can see the heat pouring out of the vents.
Reply
Old Jan 5, 2011 | 06:08 PM
  #30  
TYphoon's Avatar
Seasoned Member
 
Joined: Oct 2009
Posts: 381
Likes: 0
From: Douglassville/Altoona, Pa
Year: 1996
Model: Cherokee
Engine: 4.0 HO
Default

I have the lebaron vents, and they work great when crawling, and look fantastic.

Make sure you get drip pans though...these sumbiches WILL fry your TPS.

Reply



All times are GMT -5. The time now is 04:07 PM.