Re: [alfa] Dead springs on Magnet Marelli advance mechanism?

["Matthew Hanselman" <mjhanselman@xxxxxxxxxxx>]

Thanks for the replies

I have a PLEX 10 system in the car, which was used in the 80-81 spiders.  
True, I don't truly know the springs are dead, but there are two different 
kinds of springs in the advance mechanism (different weigths and coil 
counts), and one of them is overstretched so it doesn't even engage in the 
first 1/4" of travel of the weight.  The rest of the SPICA is still in 
place.

Oh well.  The car still runs pretty well when it's wide open... :)

- Matt


> From: "Dean W. Cains" <dwc@domain.elided>
> To: alfa@domain.elided
> CC: "Matthew Hanselman" <mjhanselman@domain.elided>
> Subject: Re: [alfa] Dead springs on Magnet Marelli advance mechanism?
> Date: Wed, 16 Jun 2004 22:19:23 -0400
>
> Hi Matt:
>
> I'm not sure what criteria you're using to determine the condition of the 
> advance springs, but a fair amount of free play is built into their 
> mechanism.  The only proper way to check your timing, and advance/retard 
> with rpm changes, is with a timing light (preferably an "advance" timing 
> light with a dial indicator or digital display).  Tried that?  Assuming 
> that you have, there are other considerations, and given the choice between 
> having the timing set properly at 5000 rpm's or idle. most of us would 
> choose the former, and that's not necessarily something that needs 
> intervention.  Further, if the distributor is in fact from an '80 Spica 
> Spider, you'd be better off with the original distributor, with regards to 
> having an advance curve that suits the '73 Spica engine.  Finally, I'm sure 
> most of us are unsure what distributor you're speaking about, since all the 
> Spica cars used Marelli distributors, although among the later cars, some 
> had dual sets of points and some were breakerless.  Do you have a model 
> number?  Does your '73 have its Spica system still in place?
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