Most of the Webers ( original) have a stack that has a flair at the end but
a quite sharp edge and a rolled edge will give alot more flow. Kind of
difficult with the Webers as they are pretty close together but worth
finding better stacks.
----- Original Message -----
From: <GuyotLeonF@aol.com>
To: <kaskas@earthlink.net>; FOT <fot@autox.team.net>
Sent: Tuesday, January 25, 2000 3:15 PM
Subject: Velocity Stacks and Rampipes? was SU carb fuel flow
> In a message dated 25/01/00 23:05:01 GMT Standard Time,
kaskas@earthlink.net
> writes:
>
> << The shape of the velocity stacks is super important. The air is
actually
> drawn from the carburetor side of the air inlet and so must go around the
> corner to get into the carburetor. Therefore making a smooth roll on the
> edge makes this possible and will alter the value if not taken into
> consdieration. There are several companies that make this kind of stack.
> (NO, I don't know who off hand but I know if I wanted these parts I'd
sure
> find 'em.)) >>
>
> Dear Kas and other FOT'ers
>
> My Vitesse has Triple Weber 40DCOE-18's fitted with the old style of steel
> Rampipes.
>
> Firstly,
> Are they what you are referring to as velocity stacks? or is that
something
> different?
>
> Secondly,
> I have seen some racers using a more modern design of alloy rampipes,
> referred to as 'full radius' rampipes, which apparently exhibit increased
> airflow due to roll back lip design...
>
> I would be interested to hear of your (Kas) and any other FOT'ers thoughts
on
> these, and whether they are a worthwhile upgrade from the old design?
>
> Léon F Guyot
>
> Triumph Sports Six Club
> International Liaison Secretary
> 1963 Triumph Vitesse 2-Litre Convertible
> Wimbledon, London, England.
>
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