Webra Promix carb...

[Lance Van Nostrand]

Emory,
I have a NIB Bully carb which is nearly identical to the new promix carbs.  The old ones stunk and Bully modified them, then Webra incorporated that mod into production about the time Piedmont started importing them, so they are nearly identical.  The Webras are fine running engines as you probably know.  Each engine has a personality that you can understand.  Your problems at Nats were definitely the MC carb in my opinion, but its not clear if the carb itself is the issue or the flexing linkages or geometry.  I think the promix carbs will be lighter, so even if the performance is as good as a properly set up MC, you'll be lighter in the end. 
   General tricks for reliability with Webras are simple: Use 20% or more to reduce the demand on their poorly designed carbs (engine gets oxidizer from fuel and not atmosphere), Needle will need resettting when weather changes so have your tach available and don't be afraid to adjust a few clicks if needed, however if more than a few clicks are needed change bearings (they don't seem to last that long so use afterrun oil generously).  Getting into a good regimen wil make them reliable and dependable. 
--Lance
  ----- Original Message ----- 
  From: Emory Schroeter 
  To: discussion at nsrca.org 
  Sent: Monday, July 25, 2005 3:49 PM
  Subject: Re: Webra Promix carb...


  About the only thing I didn't have to borrow was the airplane:-) Now, if I can only figure out how to borrow Quique's fingers...

  Emory.
    ----- Original Message ----- 
    From: Ron Van Putte 
    To: discussion at nsrca.org 
    Sent: Monday, July 25, 2005 3:52 PM
    Subject: Re: Webra Promix carb...



    On Jul 25, 2005, at 2:35 PM, Keith ((primary)) wrote:


      Emory, I think I can help solve your problem.  Replace each of those Pro-Mix carburetors (along with the entire engine) with an OS 1.40RX.  


    Emory had a real adventure at the Nats, trying to keep his airplane flying with three different Webra 1.45 engines. The first two were his and, early on, he could be found taking things out, replacing parts and otherwise diddling with them. Then he borrowed one from Jim Woodward, I think, and finished the Nats with it. I hope he sticks with the Webras, so I have a chance to beat him at fall contests when his engine dies.

    Ron Van Putte



      From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of Emory Schroeter
      Sent: Sunday, July 24, 2005 11:58 PM
      To: Pattern NSRCA
      Subject: Webra Promix carb...
       
      Hello,
       
      I was wondering if anyone out there has a Webra Promix carb (that will fit the Webra 1.60) that they are not using and would be willing to part with. Horizon Hobbies currently lists them as out of stock. I would like to find two of them. Please respond to...
      emorydmd at earthlink.net
       
      Thanks, Emory Schroeter.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20050726/146e5af1/attachment.html