Fwd: Re: MarelliPlex timing

[Kevin Trent <trentkc@domain.elided>]

I should have included the reason for setting ignition timing on TDC at 
idle is because with less total advance, if you set the ignition timing at 
the M(ax) mark, the engine will have too much advance in the middle of the 
rev range, and you'll get predetonation.  The TDC mark is a good starting 
place, and you get pretty close the M timing mark at 5000rpm.  Of course, 
you can advance or retard to suit the octane of gas you are running.
<snip>

>I believe that the Marelli Plex 201 has about 6 degrees less total advance 
>than the stock Marelli S103 distributors. I generally set them on TDC at 
>idle for both carbs or spica.  They have been very reliable for me.  The 
>old red Shankle catalogs had graphs of all the alfa distributor advances, 
>including the Plex and Shankle's recurved modification to increase advance.
>
>//kct, Powell, TN
>
>At 05:22 PM 4/12/02 -0400, you wrote:
>
>>Date: Fri, 12 Apr 2002 11:33:27 -0600
>>From: Ed Lutz <edlutz@domain.elided>
>>Subject: marelliplex timing
>>
>>Are the ignition timing specifications changed at all when using a
>>Marelliplex ignition instead of stock points? Engine is a late 1750.
>>
>>Thanks,
>>
>>Ed
>>Loveland, CO.
>>1974 Spider with a 1750 under the hood
>>
>>---

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