Not "vanes", but ridges. DC calls this "progressive throttle bore" which is a way of supposedly giving you better gas milage. It really doesn't work because people who have ported TB's report better milage. Stick your finger down the bore with the blades open and feel the "ridge". Then go the http://home.att.net/~flyboy01 to see how to port one.
Mark
-----Original Message-----
From: Jon E. Sager <jon@interlockingtech.com>
To: DML <dakota-truck@buffnet.net>
Date: Wednesday, April 14, 1999 10:53 AM
Subject: DML: Throttle Body Mods
I've seen many people advocate the removal of "vanes" inside of the throttle body for increased HP and MPG. If this is so, why are they there in the first place? What would I be giving up?
Thanks,
Jon.
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