MC carb for Webra

[Rcmaster199 at aol.com]

In a message dated 6/5/2003 3:48:15 PM Eastern Daylight Time, 
James.Woodward2 at edwards.af.mil writes:


> Subj:RE: MC carb for Webra 
> Date:6/5/2003 3:48:15 PM Eastern Daylight Time
> From:<A HREF="mailto:James.Woodward2 at edwards.af.mil">James.Woodward2 at edwards.af.mil</A>
> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> Sent from the Internet 
> 
> 
> 
> I think the 31.5" is correct from plug to aft edge of pipe.  That means you
> cut the header down some.  I did this, and it worked just fine for my Webra
> R and AAR.  
> 
> You can adjust the engine to run perfect on the ground.  However, if you
> hear a "pop" when pushing from inverted and adding power, you will need to
> RICHEN the midrange.  
> 
> Jim W.
> 
> -----Original Message-----
> From: Jerry Budd [mailto:jbudd at QNET.COM] 
> Sent: Thursday, June 05, 2003 8:26 AM
> To: discussion at nsrca.org
> Subject: Re: MC carb for Webra
> 
> Brian,
> 
> According to the Piedmont website the baffle is 4" ahead of the aft 
> end of the pipe so that puts you at ~27.5" from plug to baffle.  When 
> I tried the Greve pipe that Piedmont sells, I found that to be too 
> long (way down in power compared to my ES pipe at ~24" plug to 
> baffle).
> 
> Lee, Jim W., Matt - Are these needle settings close?  I haven't run 
> the ProMixII carb in a while.
> 
> It sounds to me like the pipe may need to be shortened some, and the 
> low end richened up a bit.  You also probably got the motor a bit hot 
> when the pump got FOD'd and that's why the internals are a bit dark.
> 
> Jerry

Jerry I think you are correct. The low end and particularly middle, sound 
like they are lean. Brian was going to get his pump re-adjusted for a little more 
output, but I haven't spoken to him lately and I don't know if that helped or 
not. 

As far as needle settings, I still run the older carb and Im not sure about 
the newer one. Be that as it may, the settings are very close to what I use on 
my older set-up; however, the needles are different so that is just 
coincidence maybe.

matt
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