Ferrari Mailing List: Re: Standard vs U.S. Spec. ignition timing

[Hans E. Hansen (FList]

Is the timing curve in the modules, or does the distr. have the old
fashioned advance
weights?

Most of the Euro/US timing difference is at idle, with some differences in the
curve at low rpm.  I believe at full chat (above 5500rpm), they are the same.
At least in 1975.  After having the advance curves of the 2 distr. syncronized,
I simply had the timing set for the proper max advance at 5500.  OK, I added
a couple of degrees.

Hans.

On Wed, Dec 3, 2008 at 5:56 AM, Rick Lindsay <rolindsay [at] yahoo.com> wrote:
> Hello Friends,
>
> I have an '83 Mondial QV with the electronic ignition modules, synchronized 
> to the TDC sensor and fed by the RPM sensor.  This car is a true 'gray 
> market' car.  It was imported to the U.S. new and specifically to go around 
> FoNA. That being said, a few tweaks were added to the car to 'federalize' it. 
>  An oxygen sensor was added, with its little control box, controlling an 
> inserted valve used to modulate the fuel pressure feed to the fuel 
> distributor.  That's all since been removed.
>
> What I am interested in learning is based upon comments Ric Rainbolt made, 
> regarding Jim Wilcox's 308GT4, when they were discussing ignition timing.  
> The U.S. cars are timed differently from the European cars.  Its an EPA 
> thing.  But since my car is European, I suspect that the ignition modules are 
> timed to that specification, not the U.S. setting.
>
> Are there different model numbers for the different modules?  I can't imagine 
> that the TDC sensor was offset to change the timing.  That would be very 
> difficult, and silly - not the Italians are immune to silliness.
>
> This topic is a parallel to Peter's questions about cam timing.  Anyone have 
> insight into this ignition timing variation?
>
> rick
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