NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > Modified Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

Reply
 
Thread Tools Display Modes
  #1  
Old April 3rd, 2018, 11:35
Weekender's Avatar
Weekender Weekender is offline
NAXJA Forum User
 
Join Date: Jan 2018
Location: Memphis
Posts: 19
Hood vents, scoops etc. Heat extraction

Our newly acquired '01 XJ is black and on a warm day we did have the vaporized fuel in the hot rail idle issue.

Summer here is brutal so I'm looking for options for scoops or vents on the low budget side. I've seen the spacer / stacked washer approach to raise the rear of the hood and wonder if that's effective.

On the next to that cheapest approach are the stick-on cosmetic hood scoops. If they were turned with the opening to the rear and suitably large holes drilled through the hood beneath them, might that work?

Can always get another hood from the junkyard.

Weekender
Reply With Quote
  #2  
Old April 3rd, 2018, 11:44
DutchVDub's Avatar
DutchVDub DutchVDub is offline
NAXJA Member
 
Join Date: Aug 2007
Location: Milliken, CO
Posts: 8,274
Re: Hood vents, scoops etc. Heat extraction

A very popular option that is generally affordable are lebaron hood vents.
__________________
Americans can sleep at night because US Soldiers stand ready to fight
Reply With Quote
  #3  
Old April 3rd, 2018, 12:19
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 11,612
Re: Hood vents, scoops etc. Heat extraction

I live in Az which gets much hotter! Although I've never had any heat soak issues, when building my stroker I went with the DEI rail kit.
http://designengineering.com/fuel-ra...tor-cover-kit/
Reply With Quote
  #4  
Old April 3rd, 2018, 12:22
IslanderOffRoad's Avatar
IslanderOffRoad IslanderOffRoad is offline
NAXJA Forum Addict
 
Join Date: Apr 2006
Location: Houston, Tx
Posts: 8,628
Re: Hood vents, scoops etc. Heat extraction

I went with the Lebaron vents on mine. They helped, but I still heat soak if I shut down while running trails.
__________________
John V.
Director at Large

01 XJ Sport 2 door 5spd/4WD- 4" lift, Rubi wheels/tires JCR bumpers/sliders, armor, Rubi 44, Ford 8.8, 4.56's, ARBs.
Reply With Quote
  #5  
Old April 3rd, 2018, 13:29
Tim_MN's Avatar
Tim_MN Tim_MN is offline
Freakish Hand Strength
 
Join Date: Mar 2003
Location: Minneapolis, MN
Posts: 6,269
Re: Hood vents, scoops etc. Heat extraction

Hood vents, and an e-fan timer for cooling after shutdown. LeBaron and Pontiac Sunbird vents are somewhat common, ZJ 5.9 vents are less common.


My functional hood vents were donated by a Pontiac Sunbird.

.
__________________
.
.

Quote:
Originally Posted by bimmerjeeper

I'm starting to realize people on the Jeep forums are highly expert mechanics .....
Reply With Quote
  #6  
Old April 3rd, 2018, 14:05
Ralph77 Ralph77 is offline
NAXJA Forum User
 
Join Date: Dec 2015
Location: East Coast
Posts: 269
Re: Hood vents, scoops etc. Heat extraction

Quote:
Originally Posted by Tim_MN View Post
Hood vents, and an e-fan timer for cooling after shutdown. LeBaron and Pontiac Sunbird vents are somewhat common, ZJ 5.9 vents are less common.
Yeah but 5.9 vents are so much cooler. I don't seem to have heatsoak issues with my '00. I did have surface rust issues on the hood and roof. Figured since the hood had to be done anyway I did it just for the look. Can't post a picture of mine but you can see it here. Post # 84139

http://www.jeepforum.com/forum/f177/...l#post36316153
Reply With Quote
  #7  
Old April 3rd, 2018, 15:11
ehall's Avatar
ehall ehall is offline
NAXJA Member
 
Join Date: Dec 2007
Location: Southern Maryland
Posts: 9,022
Re: Hood vents, scoops etc. Heat extraction

I use the Rugged Ridge vents for the TJ and JK hoods, fits fine, work great

__________________
.
my '91 beater rebuild
Reply With Quote
  #8  
Old April 3rd, 2018, 18:33
The_Punisher The_Punisher is offline
NAXJA Forum User
 
Join Date: Feb 2017
Location: Kodiak, AK
Posts: 117
Re: Hood vents, scoops etc. Heat extraction

Lookup the 1" rear hood spacers. They go on the hinges and raise the rear of the hood almost like a cowl. Independent tests shows a 20* temp drop.

Got mine off ebay for $15. 5 min install
Reply With Quote
  #9  
Old April 3rd, 2018, 18:35
ExTankerGuy's Avatar
ExTankerGuy ExTankerGuy is offline
De Colores!
 
Join Date: Jan 2005
Location: Southern Indiana
Posts: 3,210
Re: Hood vents, scoops etc. Heat extraction

Or support one of our sponsors.

https://www.napierprecisionproducts....t-LB-HV-LB.htm
__________________
J.R. Member #1200
'88 MJ on 235s a.k.a. "Mary Jane"
'87 XJ Wagoneer on 235s 1987 - 2017 RIP
'95 ZJ on 31s (DD) and a '16 EcoBeast tow rig
Reply With Quote
  #10  
Old April 3rd, 2018, 19:26
ATC1128 ATC1128 is offline
NAXJA Forum User
 
Join Date: Aug 2017
Location: Colorado
Posts: 114
Hood vents, scoops etc. Heat extraction

I use the Napier hood louvers. They work well but anything that allows hot air to escape will reduce heat soak, especially over stock.

Sent from my SM-G930V using Tapatalk
Reply With Quote
  #11  
Old April 4th, 2018, 07:30
Weekender's Avatar
Weekender Weekender is offline
NAXJA Forum User
 
Join Date: Jan 2018
Location: Memphis
Posts: 19
Re: Hood vents, scoops etc. Heat extraction

Thanks for all the responses! Going to the U-pullit yard this weekend looking for vents. If I don't find anything I think the Napier vents will be the choice.

Weekender.
Reply With Quote
  #12  
Old April 4th, 2018, 09:23
XJsportG's Avatar
XJsportG XJsportG is offline
SouthEast #4328 (RVA)
 
Join Date: Apr 2011
Location: Richmond, VA
Posts: 202
Re: Hood vents, scoops etc. Heat extraction

I went with Run Cool Hood Louvers.

http://hoodlouvers.com/shop/size-med...black-hi-flow/


__________________


RVA

Last edited by XJsportG; April 4th, 2018 at 09:37.
Reply With Quote
  #13  
Old April 4th, 2018, 12:33
Rod Knee's Avatar
Rod Knee Rod Knee is offline
NAXJA Forum User
 
Join Date: Apr 2007
Location: flyover country
Posts: 1,316
Re: Hood vents, scoops etc. Heat extraction

<P>I have the Napiers. I spaced them more widely apart than most people space their vents so that they did not overlie sensors.</P>
Reply With Quote
  #14  
Old April 4th, 2018, 13:01
fursphere fursphere is offline
NAXJA Forum User
 
Join Date: Mar 2016
Location: Sacramento, CA
Posts: 8
Re: Hood vents, scoops etc. Heat extraction

I put Napiers on mine. You can see the heat 'waves' coming out of them at stop lights and what not. So they're definitely working.

https://www.napierprecisionproducts....t-LB-HV-LB.htm

I was snow wheeling last weekend and it was getting a little warm with all the snow moving / high engine load. Hit the electric fan and it almost instantly cooled off (fan helping push heat out the vents).
Reply With Quote
  #15  
Old April 4th, 2018, 15:00
lazyxj's Avatar
lazyxj lazyxj is offline
NAXJA Member #1310
 
Join Date: Mar 2004
Location: Los Angeles
Posts: 2,198
Re: Hood vents, scoops etc. Heat extraction

All 2001 US XJs have the dual mini-cats, most 2000s do not, unless California models. There is a big difference between having mini-cats and not having them.
https://www.cherokeeforum.com/attach...001exhaust.jpg
The mini-cats throw a huge amount of heat into the the intake manifold and engine bay. If you have the mini-cats, you most likely will have the heat soak problem in warm weather.
It's really a problem when wheeling at slow speeds.
It happens when a hot engine is shut off for just a few minutes. Wait twenty minutes or longer and it's not a problem.

Over the last 15 years, I have tried all the suggested fixes for this problem.
The fuel injectors and fuel pump hold pressure for longer than the Factory specs.
The fuel injectors have been wrapped, a TJ manifold heat shield (DEI kit) installed, the bottom of the intake manifold has been insulated, hood vents have been added and a adjustable fan timer installed, for use in warm weather when the engine is shut down.
While each added thing has helped some, the only absolute cure has been to use the fan timer, set to run for three minutes, after the engine is shut down.
Forcing the mini-cat's heat out with the electric fan prevents the hot soak problem.
__________________
Both XJs are still Real XJs http://www.naxja.org/forum/showthrea...hlight=real+XJ
01 Sport, 4.6L Russ Pottenger. stroker, AW4, 4" lift, 33 X 10.50 KM2, 4.56-8.25 TruTrac, D-30-E-Locker with alloy shafts, Hidden M8000 winch, Vanco front and ZJ rear disc brakes, Frame stiffeners, Lots of armor, Towing baseplate. http://www.flickr.com/photos/lwade/c...7603770130683/
1997 Country, Mostly stock, 2" lift, Engine mods, Towing baseplate
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Heat Extractor Hood Vents sixty7ss Modified Tech Discussion 30 August 17th, 2012 11:44
Use Cowl for Heat Extraction / Vent Miller88 OEM Tech Discussion 4 May 12th, 2011 11:48
hood vents/scoops! tj'sxj Modified Tech Discussion 12 December 23rd, 2009 10:11
For Sale: Louvers, Vents, and Hood Scoops 99xj4x4 SoCal For Sale 6 September 23rd, 2008 17:56
For Sale: Hood Louvers and Hood Scoops 99xj4x4 Sierra Chapter For Sale 3 September 23rd, 2008 10:08


All times are GMT -7. The time now is 05:58.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014