MPG Time: Heat Exchanger - Jeep Cherokee Forum

Go Back  Jeep Cherokee Forum > General > Cherokee Chat
MPG Time: Heat Exchanger >

MPG Time: Heat Exchanger

Cherokee Chat General non-tech Cherokee chat
XJ/MJ/ZJ/WJ

MPG Time: Heat Exchanger

Old 01-01-2019, 03:56 PM
  #1  
CF Veteran
Thread Starter
 
CoffeeCommando's Avatar
 
Join Date: Apr 2010
Location: Florida
Posts: 1,526
Year: 2000
Model: Cherokee(XJ)
Engine: 4.6 Re-Built Golen, 68-200-4 Comp Cam
Default MPG Time: Heat Exchanger

I've just ordered a Dudadiesel heat exchanger I intend to use with the coolant to pre-heat the fuel on my 2000 XJ. I've only found 3 people that have done this on their vehicle and all 3 had fantastic results. I couldn't find where anyone had tried to do something like this and had a bad experience. Two of them wound up copper tubes to some degree to their coolant hoses, one guy used a transmission cooler/heat exchanger from a Ford of some design to do what I am about to do with the Dudadiesel heat exchanger. Has anyone else seen or heard of anything doing something like this? I would have thought I could find more people that had done it online but it appears to not be nearly as common as all the other alternatives that may or may not work... sometimes. (hydrogen, magnets, etc)

I'm waiting on the fuel pressure to bleed back into the fuel tank at the moment. I am converting my non-return style system to a return style using the purge port as a return for the time being, using an adjustable fuel pressure regulator. I just replaced the pump 4 months ago with a Carter unit from RockAuto and the check valve slowly died over the course of two weeks. I've been priming it 5 times every time I start it since... not for long though. It also runs at 60PSI when it's supposed to be 50. I think I'm going to whittle it down to 43-45 and see how it responds. Has anyone else return'ified their setup?

CoffeeCommando is offline  
Old 01-06-2019, 03:59 PM
  #2  
CF Veteran
 
Morat's Avatar
 
Join Date: Jan 2010
Location: North Riding of Yorkshire, UK
Posts: 1,104
Year: 1997
Model: Cherokee
Engine: 4.0
Default

Never heard of it. Are you thinking that pre-heating your fuel will increase efficiency?
Morat is offline  
Old 01-06-2019, 09:00 PM
  #3  
Seasoned Member
 
downs's Avatar
 
Join Date: Oct 2018
Location: Hunt County Texas
Posts: 290
Year: 1995
Model: Cherokee (XJ)
Engine: 4.0L
Default

Typically we try to keep that area cool to avoid heat soak related start up idle issues.
downs is offline  
Old 01-07-2019, 07:28 PM
  #4  
CF Veteran
 
investinwaffles's Avatar
 
Join Date: Oct 2013
Location: Tarpon Springs, FL / Denver, CO
Posts: 2,083
Year: '98
Engine: 4.0 I6
Default

Yeah, I guess I understand the theory - vaporize the fuel as quickly as possible - which means more energy is conserved or something. I dont really understand it I guess, lol
My XJ seems to do this inherently unless it's cold outside. Fuel rail is always hot as hell
investinwaffles is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
addisonwest
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
12-01-2016 06:29 PM
buysellny
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
719
11-11-2015 08:47 PM
ChilliXJ
Cherokee Chat
16
04-22-2014 09:02 PM
Monocogger
Cherokee Chat
110
05-18-2013 11:14 PM
95_xj_country
Cherokee Chat
18
09-26-2012 12:42 PM

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

Thread Tools
Search this Thread
Quick Reply: MPG Time: Heat Exchanger


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: