> Scott Gardner wrote:
>
> > Just tore down these SU HIF4 carbs that the PO dropped off. The
> > metering needles are marked "ABD". My Vicky Brit catalog lists
> > that as the correct needle for the '73-'74 models. (Mine's a '72).
> > Evidently, the metering needles in my carbs should be AAU. What's
> > the difference, and what's the usual reason for switching needles?
>
> Engine modification ... I'm not sure what modification generated the
> needle change between '72 and '73, but the 'Original MGB' indicates
> a change in the dizzy between '72 and '73 (North American spec) ...
> that would be my guess.
>
Larry,
Thanks for the info. I've got the Lucas 45D distributer on my '72
now, so goodness only knows what needle I need. I'm sure there were
some other small differences between '72 and '73 as well, because
I've noticed that the carbs have different identification numbers as
well. They were AUD493 in '72, and then AUD550 in '73 and AUD630 in
'74.
Scott
Scott Gardner
gardner@lwcomm.com
www.lwcomm.com/~gardner
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