Webra 145 with Greve Pipe

[jim ivey]

Mike
You do a cat scan of the pipe like I did. You set up the study for 2 mm increments and run the scan on a CT scanner.
Jim Ivey
----- Original Message -----
From: Jerry Budd
Sent: Wednesday, June 18, 2003 9:15 AM
To: discussion at nsrca.org
Subject: RE: Webra 145 with Greve Pipe

Hi Mike

Stick a small dowel down the inlet of the pipe until you hit the  
baffle, make a mark on the dowel coincident with the front of the  
pipe, remove the dowel and measure the distance on the dowel from the  
end to the mark.

Jerry


>  How do you determine where the baffle is on the Greves pipe? Mike
>
>-----Original Message-----
>From: Keith Black [mailto:tkeithb at attbi.com]
>Sent: Tuesday, June 17, 2003 11:39 PM
>To: discussion at nsrca.org
>Subject: Re: Webra 145 with Greve Pipe
>
>
>As long as we're talking about the Webra 1.45, RPMs and pipe length, what
>are some experiences with the Webra 1.45 and the Greve pipe. Piedmont's web
>site it recommends 27.5" to the first baffle, but recently Lee Davis posted
>that he has his set at 28.5" to the first baffle.
>
>Mine's actually running pretty well at 27.5", I'm just wondering if I can
>improve it by moving it back an inch.
>
>Lee, if you read this, why did you move yours out another inch over what
>your web site recommends? What did this improve (top end, mid range, etc.)?
>
>Does anyone else have experiences to share with this combination?
>
>Thanks,
>Keith Black
>
>----- Original Message -----
>From: "Jerry Budd" <jbudd at QNET.COM>
>To: <discussion at nsrca.org>
>Sent: Wednesday, June 18, 2003 12:00 AM
>Subject: Re: Webra 145
>
>
>>  >Let's try again - what rpm are you guys getting with what props with the
>>  >Webra 145?  I'm trying to tune mine with a Bolly pipe and have no idea
>what
>>  >to look for.  I'm trying both a 17X10 and 17X12N prop.
>>  >
>>  >Thanks for any suggestions.
>>
>>  82-8300 rpm when new, 85-8600 rpm after ~30 flights.
>>
>>  Magnum #1, OS-F or YS plug, ES-2C140L90 pipe set at 23-1/4" baffle to
>>  plug, stock Mac's 2-1/4" rise header, and an APC 17x12 prop.  The
>>  Webra MC (mixture control) carb I'm using gives a dead linear
>>  throttle response with NO jump onto the pipe.  Setup this way the
>>  motor throttles exactly the same as a DZ but with better performance.
>>  With the stock ProMix carb it throttles a lot like the OS (rich in
>>  the mid range).
>>
>>  Jerry
>>
>>  --
>>  ___________
>>  Jerry Budd
>>  mailto:jbudd at qnet.com
>>  =====================================
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>>  # discussion-request at nsrca.org
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>>
>
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--  
___________
Jerry Budd
mailto:jbudd at qnet.com
=====================================
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