Hi, Dave,
In the SU Reference Catalogue, the only 1963-4 listing is for an 'mgb
competition 4 cyl', which had either HD8 or HS8 carbs. 62-3 cars had
HS4s and in the US listings, the '68 Mk.1 cars and Mk 11s up to '72 all
had the same HS4s.
Assuming your carbs are HS not HIF, the correct all nylon floats are WZX
1300 which are, and I quote, 'All HS types. White Nylon-non-adjustable.
Supercedes all previous HS floats.'
Official line notwithstanding, you can adjust the floats for a lower
fuel level but ONLY if your float needles are in good order. How? By
varying the thickness of the washer under each needle seating.
However, I would suggest that you check the needles and seats first and
make sure that there isn't too much feed pressure. You can check the
later isn't happening through too enthusiastic a pump (i.e.
non-standard). This can be cured by fitting the correct pump or a Filter
King or other pressure regulator. The other possible problem could be
engine bay heat causing the fuel pressure to rise. This can also lead to
vapour locks and the cure is to re-route the fuel line away from high
heat sources.
Hope this helps,
Dave Hill
UK
Dave Houser wrote:
>
> Actually, I'm the one having that overflowing carb problem and this
> weekend I went up the the Lime Rock Fall Festival and found a pair of
> floats that looked like they would work in my 64 B. They didn't have a
> metal fork through which the pin passed but it was one piece plastic on
> the float! The surface that would meet the pin on the float needle had
> an angle to it that must have accounted for the correct clearance as
> there was no adjustment to be made. Anyone have experience with these
> floats?
> Cheers,
> Dave Houser
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