Jeff, I'm not sure if it is 1500 thing but I tried the setup last year and the
oil came out the dip stick. I had to abandon the DGV then because the air filter
was hitting the hood. I have replaced the Cannon manifold with a Pierce so I'm
ready to try again. I know other people have had the oil problem but I'm not
sure if it is characteristic to the 1500 only.
Vic W.
Jeff McNeal wrote:
>
> I'm not sure why my high compression 1296 engine (9.0:1) doesn't have a
> problem, but I have the crankcase ventilation connecting to the top plate of
> my Weber DGV as designed and have no problems with excessive oil blowby
> whatsoever...
>
> Best wishes,
>
> Jeff in San Diego
>
> '67 RHD Spitfire Mk3 aka "Mrs. Jones"
> '68 LHD Spitfire Mk3 frame-off resto project
> Jeff's Classic '67 Spitfire Mk3 site & Vintage Spitfire Webring
> http://www.ohms.com/spitfire/spitfire.shtml
> home of the NEW Totally Triumph Auction
> "By Triumph enthusiasts, for Triumph enthusiasts"
> http://www.ohms.com/cgi-bin/TRauction.cgi
> and..The Totally Triumph Garage forums -- moderated, focused, friendly!
> http://www.ohms.com/cgi-bin/dcforum/dcboard.cgi
> ...plus a few other surprises!
>
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>
> ----- Original Message -----
> From: "Vic Whitmore" <vicwhit@home.com>
> To: "Spitfires Maillist" <spitfires@autox.team.net>
> Sent: Friday, March 30, 2001 6:29 AM
> Subject: Weber DGV vacuum
>
> >
> > I'll be installing a Weber DGV onto my 76 Spitfire in the next few weeks
> and I
> > need some insight from those that have "ben there, dun that". I am aware
> that
> > the positive crankcase pressure is not relieved by connecting the hose
> from the
> > valve cover to the air filter connection. The result is oil pushing out
> through
> > the dip stick.
> >
> > On the ZS, this isn't a problem because the hose from the valve cover is
> > connected to a high vacuum port on the carb which relieves the excess
> pressure.
> >
> > It would be nice if the DGV had a similar port but that doesn't appear to
> be the
> > case. Is it possible to add a port by opening up an existing but blanked
> out
> > port, or adding a completely new one? I would suspect that if this were
> possible
> > the jets/needles would have to be changed and I am prepared for that
> > eventuality.
> >
> > Failing the vacuum port, my last resort is to use a catch can (way down at
> the
> > bottom of the list) which is vented to the air filter. Some people have
> > fashioned a connection to a blanked off plate where the fuel pump goes and
> they
> > use an electric fuel pump. Since I use a mechanical pump, where is the
> best
> > place to vent the crankcase?
> >
> > Vic Whitmore
> > 76 Spitfire
> > Thornhill, Ontario
> >
> > http://www.vicwhit.com
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