Exhaust Wrap - Ranger-Forums - The Ultimate Ford Ranger Resource


General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-27-2005
loneFX4's Avatar
Member
Thread Starter
 
Join Date: Jan 2005
Location: Summerville,SC
Posts: 955
Exhaust Wrap

since that last thread about exhaust wraps kinda got swamped about louvres, i wanted to ask if an exhaust wrap is that shy stuff that looks kinda like wut you put in your windshield when the car is parked to keep the sun out. im thinking of doing a custom intake that may not be done in metal tubing so i need somethin to keep it from suffering from high temps but i dont want a big shiny wrinkled aluminum thing sittin right there on top.
Reply With Quote
  #2  
Old 01-27-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
exhaust wrap is made of woven fiberglass, its usually not reflective but comes in different colors

as far as the material of your intake, tests show that material of the intake has little if any effect on the temperature of the air moving through it. i think it was griggs who had the specs on that test??
Reply With Quote
  #3  
Old 01-27-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
No specs. The intake has a high heat resistance compared to metal and the air moves very quickly. It's pretty apparent that it's not the big place where the air gets heated. It's the heat coming INTO the intake that is more of an issue.

Hmmm...maybe louvers would help...

It's silly to start a new topic though. You could still have asked this in that one. What difference does it make what's talked about in it, as long as the topic still refers to the wrap?
Reply With Quote
  #4  
Old 01-27-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
john i could have sworn you had some numbers or a link when we were having the big intake material debate over on GE, do you not have it anymore?
Reply With Quote
  #5  
Old 01-27-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
I think we use a thermodynamics calculator or something somewhere. You input estimated r-values, flow rates, densities, temps, etc. and get heat transfer numbers. I don't remember at all, that was quite a ways back and I may even be remembering a different problem, lol.

It's all academic -- it just doesn't make that much of a difference in the intake when you're moving, and the engines RPM is up, which is usually where people are concerned about it. Even at slower RPM's, it's not a big deal.
Reply With Quote
  #6  
Old 01-27-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
Reply With Quote
  #7  
Old 01-27-2005
sawred's Avatar
Member
 
Join Date: Jan 2005
Location: San Antonio, TX
Posts: 580
Stainless steel is better than aluminum (in general)

I think i might have toyed with the calcs and values back in college, dont recall if i ever finished it or found also that it probably isnt that significant.

But I got an SSD and it's stainless
Reply With Quote
  #8  
Old 01-27-2005
loneFX4's Avatar
Member
Thread Starter
 
Join Date: Jan 2005
Location: Summerville,SC
Posts: 955
im not worried about the temp of the air, well i am but....thats not the reason for exhaust wrap. i was worried about keeping wutever i use from getting heat damage or sumthin
Reply With Quote
  #9  
Old 01-27-2005
Strider0O0's Avatar
Member
 
Join Date: Jul 2004
Location: Philadelphia, PA
Posts: 3,588
lonefx4, i think they misunderstood ya..

bob i think he means he doesnt want the intake tube itself to accidentally melt from the heat of the engine if its accidentally rerouted somehow too close to the engine itself.. wasn't yet asking about temps of the air flowing thru, lol.. that'll be later!
Reply With Quote
  #10  
Old 01-27-2005
sawred's Avatar
Member
 
Join Date: Jan 2005
Location: San Antonio, TX
Posts: 580
well, either way you whether you are concerned with the tube temp or air temp, you are trying to keep the tube as cool as possible. The exhaust wrap keeps heat inside the exhaust headers so they should work at keeping heat off the tube. You would want something light, like a white wrap (not black). Actually a reflective (shiny) wrap would be best.

Basics in thermodynamics: Heat goes from hot to cold. There are three "modes" of heat transfer: conduction (surface to surface), convection (air) and radiation (radiated waves).

Unless the tube is pysichally touching the engine or something hot, your biggest threats of heat are convection and radiation. This is where the reflective material will benefit as the heat will reflect or "bounce off". Some heat will be transferred to the wrap and this is where a good material comes in, one that is not very conductive. Aluminum for instance is a great conductor of heat and therefore is bad in this application. That should pretty much get you started, and may be enough to complete you project. Good luck!
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
For Sale: NEW 2"x50" Black DEI Exhaust Wrap (IN) Hillyard Engine & Drivetrain 0 01-06-2015 07:26 PM
Exhaust wrap on headers sawred 4.0L OHV & SOHC V6 Tech 33 07-22-2009 08:07 AM
Axle wrap??? moohouse77 Drivetrain Tech 14 04-01-2008 12:21 AM
I am pretty sure this is axle wrap? HarryTasker Drivetrain Tech 4 12-23-2006 09:08 PM
still getting axle wrap :( easy-goin Suspension Tech 12 12-03-2005 10:18 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 04:56 PM.


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.