Hi Mike,
There is a lot of mix and match that folks do on rebuilding SU carbs. You might
be the recipient of this. Some of the items that are variable on these carbs
are
the internal dimensions of the air chamber, the external diameter of the piston,
the weight of the pistons, the size of the air holes in the bodies. It's often
the case you do everything right on a nice clean rebuild, but the two carbs
might
not be the same! Welcome to the delights of DPO carb rebuilds on a possible mix
and match basis!
Paul A
Mike Maclean wrote:
> I think I've got the tuning of the multiple S.U. carbs down pretty well
> after rebuilding the jet assemblies twice, replacing the rear carb body,
> shaft and butterfly and replacing all other gaskets in the carbs. It
> amounts to rebuilding these carbs twice. I am stumped by the rear
> carb. The mixture nut has to be screwed almost all the way up to get it
> to lean out properly and idle will drop below 1500 rpm with the
> adjustment screws all the way off the stops of both carbs. The needles
> are correct for the S.U. H1 carbs (GG) and the jets are the correct .090
> size and are new. What are some possible reasons for this?
> Mike MacLean-60 Sprite
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