1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

How much header wrap?

Discussion in 'Engine Building' started by wanderinman, Mar 27, 2005.

  1. wanderinman

    wanderinman Senior Member

    Messages:
    863
    Likes Received:
    0
    Joined:
    Feb 28, 2005
    Location:
    Raleigh, NC
    I am planning on buying some header wrap to wrap my greddy headers, just curious if anyone knows about how much wrap to buy? Not gunna need this again anytime soon, so I dont want to buy too much.
     
  2. pills_PMD

    pills_PMD Super Moderator

    Messages:
    4,232
    Likes Received:
    0
    Joined:
    Sep 30, 2002
    Location:
    New Albany, OH
    how wide is the wrap?

    what you want to do is measure the diameter of the header pipe... divide it by 2 to get the radius...

    circumference = 2*pi*r

    then measure how long you want to wrap it... call that "h"

    2pi*r*h is the surface area of what you need to cover... so figure that out.. multiply is by 1.5 or since you will overlap that shit as you wrap it for a good seal...
     
  3. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

    Messages:
    4,623
    Likes Received:
    54
    Joined:
    Sep 29, 2002
    Location:
    Wallingford, CT
    Why do you want header wrap in the first place ??
     
  4. pills_PMD

    pills_PMD Super Moderator

    Messages:
    4,232
    Likes Received:
    0
    Joined:
    Sep 30, 2002
    Location:
    New Albany, OH
    retains the heat so it doesn't saturate the engine bay... not really necessary in my opinion... i assume you asked the question knowing what the header wrap was for and were just asking why someone would do that right?? lol
     
  5. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

    Messages:
    4,623
    Likes Received:
    54
    Joined:
    Sep 29, 2002
    Location:
    Wallingford, CT
    ^ pills you hit the nail on the head.

    I was wondering why he wanted to waste his time. Yes it helps reduce under hood temps, but condensation between the header wrap and the header becomes a problem. also condensation on the inside of the header can be a problem as well.

    I always say if you want to lower under hood temps and are thinking about header wrap do it right the first time and have it ceramic coated inside and out.
     
  6. wanderinman

    wanderinman Senior Member

    Messages:
    863
    Likes Received:
    0
    Joined:
    Feb 28, 2005
    Location:
    Raleigh, NC
    Combination of cooling the engine bay and gaining a slight amount of exhaust efficiency (less heat loss = less velocity loss of exhaust charge). However, I had never heard of condensation problems with the header wrap. I'll have to look into that.

    Also, where would I go to get a header ceramic coated, and would it be cheaper to just buy a ceramic header to begin with?
     
  7. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

    Messages:
    4,623
    Likes Received:
    54
    Joined:
    Sep 29, 2002
    Location:
    Wallingford, CT
  8. brian11to1

    brian11to1 Senior Member

    Messages:
    9,203
    Likes Received:
    21
    Joined:
    Jan 9, 2003
    Measure twice cut once. You need 5 miles of header wrap.
     
  9. beerbongskickass

    beerbongskickass Senior Member

    Messages:
    497
    Likes Received:
    0
    Joined:
    Apr 28, 2004
    Location:
    Longview WA


    Exactly what I was thinking. I would save the money for beer.
     
Verification:
Draft saved Draft deleted

Share This Page