[NSRCA-discussion] Need help setting up pipe

[daddyb3089 at aol.com]

Thanks for the advice! 
 
-----Original Message-----
From: Jerry Budd <jerry at buddengineering.com>
To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
Sent: Sat, 18 Mar 2006 23:14:25 -0800
Subject: Re: [NSRCA-discussion] Need help setting up pipe


Hi Bill,

Set it up for 24" from the baffle to the glow plug (IIRC the baffle 
is 13.5" back from the front of the pipe).  That length gives a nice 
amount of boost without being peaky whether you run 15% nitro or 
Magnum #1.  With an APC 17x12 you should see ~8200 rpm +/- 200 rpm 
depending on what nitro and whose fuel you choose.  Be aware that if 
the motor is new the idle won't be too great until you get >15 or 20 
flights on it.  The top end numbers won't come into their own until 
about then either.  The sleeve on the Webra's is really hard and it 
takes 20+ flights for it to really "settle in" and then it just gets 
better and better.

Just my $0.02 (not that I'd know anything about Webra's...)

Jerry

>I am trying to set up a Webra 145 AAR running a Johnson 2 1/4 rise 
>header and a ES D2C160L9 pipe and was wondering if anyone could help 
>with a length to the baffle.
>Any help would be appreciated.
>
>Bill Mitchell
>
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-- 
___________
Jerry Budd
Budd Engineering
(661) 722-5669 Voice/Fax
(661) 435-0358 Cell Phone
mailto:jerry at buddengineering.com
http://www.buddengineering.com
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