I've communicated with Vic off-list, but just to reiterate, I've got the
Pierce manifold and have no clearance problems whatsoever.
Best wishes,
Jeff in San Diego
'67 RHD Spitfire Mk3 aka "Mrs. Jones"
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 Triumph Autos/Parts Wanted Listings
http://www.ohms.com/cgi-bin/TRwanted.cgi
The Vintage Spitfire Forum -- moderated and friendly
http://www.ohms.com/cgi-bin/spitforum.cgi
...plus a few other surprises!
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
----- Original Message -----
From: Vic Whitmore <vicwhit@home.com>
To: wizardz <wizardz@maxinter.net>
Cc: Spitfires Maillist <spitfires@autox.team.net>
Sent: Monday, August 28, 2000 8:05 AM
Subject: Re: Weber DGV Help - Part 2
>
> I definitely agree with you, Paul. When I mounted the Cannon intake
manifold, I
> did not have to make any "adjustments" to the exhaust manifold. I do have
the
> same tabs and mounting flange on the exhaust manifold that you describe.
>
> ...still waiting to hear some real measurements of the listers intake
manifold
> offset. Their input will be really helpful in putting this to rest.
>
> Vic Whitmore
>
> wizardz wrote:
> >
> > Well in looking back through various materials (web, printed, jotted
notes)
> > I think the root of this manifold problem is due to the variations in
exhaust
> > manifolds fitted on various models.
> >
> > I've now seen three different exhaust manifold variations, each with
slightly different
> > clearances and various other protruding tabs and flanges.
> >
> > I can only surmise...they made a variety of intake manifolds due to
clearance issues.
> >
> > Even in the installation viewable in the photos of my DGV mounted on the
'80 spit,
> > http://www.teglerizer.com/triumphstuff/bs_engine.htm I had to grind a
tiny bit off the
> > two little ears that stuck off the exhaust manifold to get proper
clearance.
> > In comparing the exhaust manifold presently on my '75 (EGR valve on the
side
> > of the manifold under the carb) the shape of the exit from the block is
> > different from the spare manifold I have (where the ERG valve mounts on
top
> > the exhaust manifold)
> >
> > Maybe when looking for an intake... a variation in which model year
engine it's
> > being fitted to is needed.
> >
> > Paul Tegler wizardz@toad.net http://www.teglerizer.com
> >
> > ----- Original Message -----
> > From: "Vic Whitmore" <vicwhit@home.com>
> > To: "Spitfires Maillist" <spitfires@autox.team.net>
> > Sent: Friday, August 25, 2000 3:30 PM
> > Subject: Weber DGV Help - Part 2
> >
> > The response to my original plea was very helpful and I thank you one
and all.
> >
> > The net result seems to be the offset in the manifold. The manifold must
drop
> > downward so the the carb can sit low enough to clear the hood. As
several people
> > have pointed out, the problem is known, if not common, as you have seen
hoods
> > with outward dents where the air filter has hit the hood. But many other
people
> > have had no problems.
> >
> > At first I thought it may be the Cannon manifold I have. Paul Tegler,
for
> > example, used the Pierce manifold that appears to have more offset than
the
> > Cannon. But others have reported successful installations using Cannon.
I then
> > contacted Pierce for a replacement manifold and learned that indeed the
Pierce
> > has more offset, by about 1/4". I don't think that is enough. It looks
like I
> > need about another 3/4" to safely clear the air filter. At the very
minimum,
> > maybe 1/2" would do it.
> >
> > So there appears to be some other factor at play here. As someone
mentioned,
> > motor mounts may be a factor by raising the engine higher than others.
Maybe the
> > hood position is a factor but mine is very typical as compared to other
Spits I
> > know.
> >
> > But I'm not giving up on a possible difference in manifold offset. If
you could
> > measure the offset of your manifold, the make, and model number of the
manifold,
> > it could help to confirm whether this is a factor. I need to know how
much the
> > top of the tubes drop from the engine end of the manifold to the carb
end, as
> > measure on the tube not the mounting flanges. The make/model may be on
the
> > manifold casting (mine says Cannon and a four digit number).
> >
> > Even better, if you have solved this problem, I would love (as would
many others
> > with dented hoods) to hear your solution.
> >
> > Vic Whitmore
> > 76 Spitfire
> > Thornhill, Ontario
>
|