[SPAM] RE: OS 1.4 RX Header and Pipe installation in Focus II

[Bob Harden]

Thanks for the MACs headers suggestion. I'll take a look at their web site.

Bob
  ----- Original Message ----- 
  From: Rick Wallace 
  To: rharden1 at cox.net ; discussion at nsrca.org 
  Sent: Tuesday, September 13, 2005 3:38 PM
  Subject: [SPAM] RE: OS 1.4 RX Header and Pipe installation in Focus II


  Mac makes 140RX headers in two 'rises' - one will work fine with the Focus II. Part #s: 

  4742: 1.75" rise
  4743:  .75" rise
  4744:  2.25" rise. 

  info from MACS catalog at http://www.macspro.com/macs2003.pdf

  ...though I'd guess that as long as the relieved area of the firewall is properly sealed and fuelproofed, I'll bet there's plenty of beef to allow for trimming a little bit... 


  -Hope this helps 
  - Rick 



----------------------------------------------------------------------------
    From: "Robert Harden" <rharden1 at cox.net>
    To: <discussion at nsrca.org>
    Subject: OS 1.4 RX Header and Pipe installation in Focus II
    Date: Tue, 13 Sep 2005 13:45:47 -0500


    I would like some advise for installing a header and pipe in a Focus II.  I have the OS 1.4 RX engine, the OS 72102100  Header and the OS T-6010 Tuned Silencer.  My problem is that the header has interference with the firewall. I don't really want to remove material from the firewall to gain clearance.  Is there another header that I could use?  My other question is if the OS Tuned Silencer is the best choice?  I also would like to know what the length should be if the tuned silencer is used.  I am planning to use an APC 17 X 13 prop and Magnum # 1  2 cycle fuel (approx 23% nitro).  All suggestions are welcome.

    Bob Harden

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