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Lynn or Bill,
Having a quick look at the web sites, I see the choke does restrict flow and increase venturi effect, which is good for sucking up fuel from the float bowl. However without maintaining that restricted size, through to the combustion chamber, the flow returns to a slower flow. So I don't see a benefit for increased VE without the smaller sized manifold inlet tube ( matching the choke size) OR a reducing diameter manifold inlet tube (a style Lynn mentioned in an earlier post).
Or am I wrong?
George ( down under)
Lynn,
It is worth mention that on many Webers the "choke" is changeable on size. Also many people don't understand thar choke means primary venturi, not a starting restriction used on many big 4 barrel. carbs. I know this is second nature to us, we grew up on this stuff. Many of our younger contributors have never even worked on a carburetor. I used two 42 dcoe Webers on motorcycle engines used om sports racers. We ran 38-42mm venturis.
Bill Jepson
Sent from my Verizon Wireless BlackBerry
-----Original Message-----
From: Lynn Hanover <lehanover@gmail.com>
Date: Sat, 3 Apr 2010 08:59:29
To: Rotary motors in aircraft<flyrotary@lancaironline.net>
Subject: [FlyRotary] Weber chokes
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