I have a Weber DGV Downdraft that I purchased about 6 months ago and it has
a connection for the vacuum advance distributor.
Larry Miller
-----Original Message-----
From: Shawn J. Tobin <tobisj@aud.alcatel.com>
To: Spridgets@Autox.Team.Net <Spridgets@Autox.Team.Net>
Date: 08 December, 1997 11:42 AM
Subject: Dumb Question
>"There's no such thing as a stupid question--only stupid answers"--unkn
>
>I'm no expert on Weber conversions but I've read...
>
>1) You can't expect to use the vacuum advance on your distributor when
>using a Weber. (A shame as it helps economy during cruising)
>
>2) The vent on the rocker cover is an inlet and should be filtered
>using a small clamp-on filter like a K&N. In lieu of that, fit a
>later 1275cc valve cover with appropriately vented filler cap or I guess
>you could plug it maybe.
>
>3) The vent tube or "road draft tube" is designed to pull the blow-by
>gasses out of the crankcase and is an early attempt at Positive Crankcase
>Ventilation (PCV). A slight negative pressure is necessary on the
>crankcase of any A-series motor to prevent oil from seeping out the
>rear main seal. Alternatives to the draft tube are either a gulp valve
>fitted to the intake manifold like the '67 models used or dragracers
>often plumb a rearward angled tube into the header collector to draw
>the fumes out of the crankcase (unknown if the latter has been done on
>our engines).
>
>Moral: You need PCV in your engine.
>
>Just my opinion,
>Shawn
>
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