This may sound a bit silly, but do you think that the dipstick itself might
be your real problem? Does it fit really tight except for when the engine
is running? I guess my point is this: If you're not having a blowby
problem at the carb, and getting good airflow out the crankcase vent, then
how could it be anything *but* the dipstick fitting that's causing the
problem?
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: "Jeff McNeal" <jmcneal@ohms.com>
Cc: "Sizemore, Shane" <Shane.Sizemore@per-se.com>; "Spitfires Maillist"
<spitfires@autox.team.net>
Sent: Friday, March 30, 2001 9:36 AM
Subject: Re: Weber DGV vacuum
>
> Yup. I connect the hose from the valve cover to the plastic angle
connector on
> the under side of the air filter. I used the same hose as the ZS and it
has no
> blockage. Not much oil appears in the carb but it sure makes a mess around
the
> dip stick. This is just sitting in the garage, revving the engine to road
RPMs.
>
> Vic W.
>
> Jeff McNeal wrote:
> >
> > Just so I understand what's happening here... You say that when you
> > connected the venting hose to the plastic angle connector that snaps to
the
> > underside of the air cleaner plate on the DGV, you get oil all over the
> > place at the carb AND the dipstick blows out as well? Are you sure you
> > don't have a blockage of some sort in the vent hose? By the way,
you're
> > going to love the Pierce manifold. Works great.
> >
> > 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: "Sizemore, Shane" <Shane.Sizemore@per-se.com>
> > Cc: "Spitfires Maillist" <spitfires@autox.team.net>
> > Sent: Friday, March 30, 2001 9:05 AM
> > Subject: Re: Weber DGV vacuum
> >
> > >
> > > The aluminum valve cover has a similar outlet to the standard cover so
I
> > don't
> > > see how it would change things. In fact it may be worse. The aluminum
> > cover does
> > > not have any baffle on the inside like the standard one.
> > >
> > > Vic W.
> > >
> > > "Sizemore, Shane" wrote:
> > > >
> > > > I thought the aftermarket aluminum style valve covers with breathers
> > took
> > > > care of this issue?
> > > >
> > > > Anyone using them?
> > > >
> > > > -----Original Message-----
> > > > From: Jeff McNeal [mailto:jmcneal@ohms.com]
> > > > Sent: Friday, March 30, 2001 11:35 AM
> > > > To: Vic Whitmore; Spitfires Maillist
> > > > Subject: Re: Weber DGV vacuum
> > > >
> > > > 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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