In a message dated 98-08-14 19:11:13 EDT, firstname.lastname@example.org writes:
> Also some systems use
> both centrifical (sp ?) and vac, which would seem to make it less
> important. Don't know about stock TRs.
Yep, that's what the TR4 does - centrifugal (uses lead weights on the
distributor plate) and vacuum (connected to the carb throat by the "vacuum
line"). As far as how much difference either alone makes -- that's subjective
unless you are using sophisticated measuring equipment. Cheers.