Charley:
Check your workshop manual again. Particularily the part that shows
engine and distributor specifications.
Even if you happen upon a home market low compression engine the
advance characteristics are very similar.
Contrast these specifications to those of a later HIF or Zenith
equipped MGB which has a much higher centrifugal and reduced vacuum
advances.
If you install a later distributor in an early car it will tend to
ping like crazy, particularily if the vacuum unit is broken.
When Lucas created the specs. for a replacement 45D distributor for
the 63-71 MGB they knew what they were doing.
Kelvin.
>
> Kelvin,
>
> With so many different engine compression ratios, carb setups, etc
> floating around in the stock MGBs, I find it difficult to believe that
> any one dizzy's advance curves can be correct for all '63 - '71 MGBs.
>
> Cheers,
>
> CR
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