John,
Sounds like your head and your manifold were ported by a PO. The stock
setup has a sleeve that fits into the head and the manifold that normally
wouldn't allow a gasket to interfere with the flow. When the head and
manifold are ported the step on both that accommodates the sleeve would
be eliminated (as would the sleeve itself).
Moss sells a "competition" manifold gasket that has larger holes for this
reason.
David Littlefield
'62 MGA MkII
'51 MGTD
'74 MG Midget vintage racer
'61 Jaguar E-Type OTS
On Wed, 17 Apr 2002 11:07:25 -0500 John.Deikis@med.va.gov writes:
> The carb to manifold gaskets are smaller in ID than the manifold
> port. This
> is also true for the holes through the heat shield. Lots of good a
> 1 1/4-in
> carb is if it has to flow through a 1 1/8 hole in the heat shield to
> get
> into the manifold. Finally, the carb side of the manifold has a
> nicely
> machined transition at the entrance (is that original?) but
> absolutelty no
> attention paid to flow through the remainder of the intake venturi.
> Seems
> peculiar to do just a little machining and not create a nice surface
> all the
> way through the manifold.
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