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  #1  
Old 17th May 2004
c-saab c-saab is offline
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Default centrifugal advance distributor?

Anyone know if someone makes them for Saab engines? Back when I was bringing my '73 Karmann Ghia back to life, I made the switch from vacuum advance to an aftermarket centrifugal and a host of problems (and later maintenence needs) disappeared. I'd like to do the same with my '86 8V 900, as some of those familiar timing symptoms are appearing. But I find no mention of these things existing in the Saab universe. Anyone know?

--Colin
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  #2  
Old 17th May 2004
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Willy Wonka Willy Wonka is offline
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Default Re: centrifugal advance distributor?

Quote:
Originally Posted by c-saab
as some of those familiar timing symptoms are appearing.
--Colin
Which ones? Leaky diaphram? bad vac line? stuck advance pivot? Out of time?
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  #3  
Old 18th May 2004
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Matthew Matthew is offline
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Don't the 8v distributors already have counter-weights for centrifugal advance? I know the 16v distributors don't have an advance function, apart from that delivered by the retard capsule under very high manifold depressions (but I don't know how much advance this provides).

Wouldn't you expect distributors on non-turbo cars to have an advance function? :-?
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Old 18th May 2004
c-saab c-saab is offline
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It tends to drift "out of time" again after adjustments, and though I've replaced the hose, and so shouldn't need to again, it's eventually going to be time for a full replacement, and when I do, I was hoping to replace with a more robust part, as the centrifugal advance ones are (at least the ones made for VW).

The 8V does come with an advance-- it's a vacuum advance with a metal biscuit-looking thing (diaphragm?) on the dist. body and a vacuum hose to the cylinder head (as I recall). As engine speed increases, vacuum in the cylinder increases, sucking the diaphragm, pivoting the advance mechanism in the dist. It's always struck me as ingenious but rather Rube Goldberg. Are there weights in there also, Matthew? I've never noticed.

So no one's heard of such a distributor design (cent. adv.) for Saabs?

-Colin
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  #5  
Old 19th May 2004
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ProfZ ProfZ is offline
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Car manufacturers went away from pure mechanical (centrifugal) advance because of emissions concerns. And many vacuum-advance capsules (which used to supplement the mechanical spark advance) became vacuum-retardation units, to pull timing down from 10 degrees advance to zero at idle!

You might try an aftermarket company like Accel or Mallory to see if they make purely mechanical dizzies for the SAAB. Alternatively, ask your local speed shop where you can get your own dizzy "recurved" (meaning, have the springs that restrain the flyweights recalibrated for optimum performance). This requires a dyno, and is usually not cheap. But, hey, look into it if you like, and let us know what you find
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