OS1.40 Pipe

[David Lockhart]

Same experience here.  I've got 2 2.25" rise MAC headers that were bent slightly and then cut about 1.5" after 2.25" rise.  Both have over 1,000 flights and no problems with breakage or burning up couplers.  Currently using Teflon couplers w/ the constant tension spring clamps (Central has them).

Dave
  ----- Original Message ----- 
  From: mike mueller 
  To: discussion at nsrca.org 
  Sent: Monday, March 01, 2004 8:48 AM
  Subject: Re: OS1.40 Pipe


   Lance, I have the same problem with the couplers burning out when they are too close to the engine and I don't have a problem with bending my headers the same way Lance does it. Mike

  Lance Van Nostrand <patterndude at comcast.net> wrote: 
    I'm not so sure Eric. I've seen people try to cut the header in the rise
    and the couplers used kept burning out. the exhaust temps are very hot
    there, but cool quickly. You really don't want a coupler within 8" of the
    exhaust outlet.
    My suggestion, the solution I've used for years with Macs headers, is to
    use an appropriately sized forstner bit (e.g. 7/8") and drill a hole in the
    end of a 2x4. Slide in the header and use the 2x4 as a bending arm. The
    hole supports the header and the 2x4 gives you leverage. Oh, don't leave
    the header bolted to the engine!! Bolt it to something else.
    --Lance

    ----- Original Message ----- 
    From: "Henderson,Eric" 
    To: 
    Sent: Sunday, February 29, 2004 7:21 PM
    Subject: RE: OS1.40 Pipe


    They are hard to bend without kinking. I usually cant the engine to the side
    to line up the header.

    If it is a MAC, one piece header - no exhaust stub and o-rings - it is
    advisable to cut the header half way up the header rise, and fit a second
    coupler. This will allow you to rotate the tubing and also provide
    protection from header fractures.

    Regards,

    Eric.

    -----Original Message-----
    From: discussion-request at nsrca.org
    [mailto:discussion-request at nsrca.org]On Behalf Of Jeff Hughes
    Sent: Sunday, February 29, 2004 7:28 PM
    To: discussion at nsrca.org
    Subject: OS1.40 Pipe


    Now that I have my OS1.40 mounted in my new focus, I find that the pipe hits
    the side of the pipe tunnel due to the right thrust. Can I just bend the
    pipe, or should I heat it first?

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