David,
I agree with Bob. But the easiest thing to do is match the Vacuum unit
to the Carburetor setup that you have on the engine. In my case, I used
an advance unit from a Mk3 that matched the twin SU setup (also from a
Mk3) that I have on my 1500.
The reason you must do this is because the vacuum is different id it is
tapped off the carburetor or the intake manifold.
I may have a functioning Retard unit. If you are interested, I will
look and see what I have.
Joe
Bob Norway wrote:
>
> Yes you can use either.... You WILL have to fiddle with the vacuum connection
>to
> insure you use the correct port from the carb. I have used both dizzys,
>finding
> about a 12degree difference in timing between them.
>
> Good luck
>
> Bob
>
> GatesDavid@aol.com wrote:
>
> > The recent thread that I started about my failed vacuum advance turned up
>two
> > things. First that it is a retard unit not an advance and second that it is
> > just about impossible to buy just the vacuum unit apart from the
>distributor.
> > A fellow lister has offered to sell me a whole distributor (thanks Glenn)
>but
> > it is an advance rather than my current retard unit. Now I have given this
>a
> > little thought and it should make no difference as long as I replace the
>whole
> > distributor and vacuum unit as a whole. The timing will be different but it
> > should still work fine. Can anyone confirm if this is correct?
> >
> > David Gates
> > Hawaii
> > '73 Spitfire 1500
> > '78 Spitfire 1500
>
> --
> Bob Norway
> Rockledge, Florida
> Home Page http://www.geocities.com/CapitolHill/Lobby/5953/mypage.html
> ICQ# 3752712
> ***************************
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> Udorn RTAFB Nov'70 - Nov'71
> 432 AMS/Autopilot
> ***************************
> SpitList
> 1976 Triumph Spitfire 1500
> FM43376UO - Daily Driver
> ***************************
> "Don't Take My Pint Mate,
> I'm In The Loo!"
--
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