Webra 145 surge seems fixed

[Earl Vincent]

 Thanks Brian I was not sure how it worked , I just know
screwing it in made it pump a lot more fuel and richened the mixture.
Earl
----- Original Message ----- 
From: "Brian Young" <b4598070 at yahoo.com>
To: <discussion at nsrca.org>
Sent: Friday, May 23, 2003 2:43 PM
Subject: RE: Webra 145 surge seems fixed


> Turning the screw in on the regulator increases the
> pressure. Backing out the screw reduces the pressure.
> 
> The adjustable spring tension controls when the
> diaphragm opens allowing fuel to bypass back into the
> inlet side of the pump.
> 
> --- Dennis Cone <cone.man at verizon.net> wrote:
> > It seems to me that  the screw on the Webra pump is
> > a travel limiter screw
> > and screwing it in will decrease the travel of the
> > diaphragm and thus
> > decrease the volume and pressure of fuel out of the
> > pump. I have flown Bully
> > 's in the past and have taken the pumps apart
> > several times, and that is how
> > I interpreted the operation of the pump. Am I wrong?
> > Any thoughts on this?
> > I am glad you were able to get your problem fixed.
> > 
> > 
> > Dennis Cone
> > 
> > 
> > 
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]On
> > Behalf Of Earl Vincent
> > Sent: Thursday, May 22, 2003 3:28 PM
> > To: nsrca
> > Subject: Webra 145 surge seems fixed
> > 
> > I finally got the Focus done and started to work on
> > the Webra 145, last time
> > I ran it I had a mid range blank in the throttle
> > curve
> > that had me fooled a few times that the engine had
> > quit when it was still
> > running. Tuesday I used most of the afternoon to
> > make
> > adjustments to finally get the engine running
> > perfect. FYI this is exactly
> > what I did, every body has an opinion but this made
> > the
> > engine very adjustable and the transition was fine.
> > Took up first flight, long surge coming up on mid
> > throttle after long done
> > line, spin etc., landed, loosened engine and
> > adjusted
> > pump screw in 1/4 turn, flew again a little bit
> > better, repeated the 1/4
> > turns 4 more times each flight becoming better until
> > after
> > the last 1/4 it transitions, idled and ran top end
> > flawlessly the rest of
> > the day. The clue I got was that I have a Webra 120
> > pumped
> > with the same pump and carb on my Ultimate and it
> > has run with little
> > adjustment right out of the box but the main needle
> > is only
> > out about 1.25 to 1.5 turns out, the 145 at the
> > start of this was out 2.5
> > turns and was still a little lean, after richening
> > the pump the
> > 145 needle is now out about 1.5 turns out, it may or
> > may not have anything
> > to do with it but I thought I would share my
> > findings.
> > Good Flying to Ya'll
> > Earl Vincent
> > 
> 
> 
> =====
> Brian Young
> Tulsa
> b4598070 at yahoo.com
> 918-745-6046h
> 918-838-0900w
> 
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