Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-13-2008, 11:08 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Sep 2008
Location: doylestown, pa
Posts: 42

jeepin xj (pro jeep ecomodder/hypermiler) - '95 JEEP CHEROKEE XJ
Last 3: 21.58 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
on a jeep 4.0 the intake manifold gets as hot as header they are so close, shield it

Not sure if anyone has seen a straight six on a 4.0 jeep but on my 95 i have no heat shields on the ehuast aftermarket header or on the bottom of the intake manifold. i know the hotter the motor usually the better fe. But this thing really gets a lot of heat soak would you do a thermal wrap on the bottom of the intake? I was going to wrap the header but nixed that idea and dont want to ruin them by rotting out so what about the intake? i have a WAI already getting warm air off the header just curious if intake is getting wayy to hot or is it a good thing. It has to come off this weekend anyway to replace gasket and ceramic coat the header.

thanks guys, photo below of how close they are

http://images.4wheeloffroad.com/tech...m anifold.jpg

so what do you think keep the intake manifold cool or let it get as hot as the header? what is best for fe

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-15-2008, 12:32 AM   #2 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
XJ 4-Litre

My Mom has a 2000 XJ Sport with the 4.0L Straight-Six. I noticed the same with the intake manifold. The problem is, the IAT sensor is located way ahead of the stream -- close to the throttle body. I'm not sure of knock-sensors on these engines, which could effect timing and FE.

This design helps with Winter temps, but can be a real bugger with hot summer temps. Have you noticed any knocking/pinging at high loads and high temps? If not, you should be OK.

Too bad you're a year shy of ScanGauge compatibility. If you develop an MPGuino or similar to monitor timing, that should tell quite a bit about the heat and engine performance.

Honestly, be glad you have the 4.0 and not the 3.7L V-6!

RH77
__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Old 10-15-2008, 01:24 AM   #3 (permalink)
Red
Master EcoModder
 
Red's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 713
Thanks: 1
Thanked 9 Times in 9 Posts
We don't have knock sensors. On the Renix 4.0s had em.

Its not that big of a deal really. Probably easiest on JeepsUnlimited's forums (JU) but look for some posts by a dude called DinoSavva, he wrapped his IM with heat shield material and noticed a tiny difference.
  Reply With Quote
Old 10-15-2008, 08:45 AM   #4 (permalink)
EcoModding Lurker
 
Join Date: Sep 2008
Location: doylestown, pa
Posts: 42

jeepin xj (pro jeep ecomodder/hypermiler) - '95 JEEP CHEROKEE XJ
Last 3: 21.58 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Yea see iam pulling off the 95 intake for the 2000 intake for better flow and hp also when i have the intake off i am going to build a heat shield for it and wrap the whole bottum in thermo tech heat wrap
__________________
  Reply With Quote
Old 10-15-2008, 08:03 PM   #5 (permalink)
EcoModding Apprentice
 
Join Date: May 2008
Location: Mito, Japan
Posts: 106

The Move - '99 Daihatsu Move Aero Down Custom XX
90 day: 29.89 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Send a message via AIM to Dust
You could try some water injection to drop your manifold temps in summer. I don:t like the placement on the 4.0 either, but it makes it really easy to turbo the thing.
  Reply With Quote
Old 10-16-2008, 04:00 PM   #6 (permalink)
38 time NHRA/IHRA Champ
 
ATaylorRacing's Avatar
 
Join Date: Jul 2008
Location: Fishers, IN
Posts: 305
Thanks: 1
Thanked 10 Times in 8 Posts
A lot of guys that race Chrysler 2.2s and 2.5s have gained quite a bit of power by having both the intakes and exhaust manifolds ceramic coated. This keeps the temperatures inside of the exhaust from expanding outward and keeps your cool air cool in the intake. The turbo guys do this with even greater success.

__________________
42 time NHRA/IHRA drag race champ

05 SRT4-12.17@117 mph on DOTs-31.0 mpg-SOLD
96 Geo Metro-3 banger-60.1 mpg-SOLD
95 BMW M3-13.41 @ 106 mph-31mpg-SOLD
77 Chevy Monza with 350/350-FOR SALE
84 Horizon-1880 lbs-29 mpg
95 Neon-43 mpg
99 Z28-10.80 @ 127 mph-27.1mpg
2011 Prius-62.1 wife's
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Subaru Outback Hot Air Intake Results brucey EcoModding Central 22 12-10-2008 07:41 PM
any 4.0 jeep guys on here? do the deep cycle battery? 95CHERJUST General Efficiency Discussion 2 10-13-2008 10:20 AM
Hot Air intake vs. Cold Air... why or why not? Blister General Efficiency Discussion 3 10-09-2008 10:01 AM
Intake manifold heater Bearleener EcoModding Central 2 03-18-2008 02:43 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com