time delay = degrees

[Don.F.Broadus at ucm.com]

Thanks much for the info. 
                                Don

> -----Original Message-----
> From:	Shannen Durphey [SMTP:shannen at grolen.com]
> Sent:	Wednesday, July 12, 2000 9:17 PM
> To:	gmecm at diy-efi.org
> Subject:	Re: time delay = degrees
> 
> Don.F.Broadus at ucm.com wrote:
> > 
> > A dial back to zero timing light delays the flash by the amount you turn
> the
> > advance dial. The dial is calibrated in degrees. Working on building a
> dash
> > mounted advance meter. Does anyone have the formula or conversion chart
> for
> > time = degrees ?
> > For example 30 degrees advance is equal to 12.5 ms  time , that way I
> could
> > cal the advance meter correctly.
> > 
> > Thanks
> > 
> > Don
> > 
> > 
> I'm not really good with math, but I get (1/(rpm/60))/360deg =
> secs/deg.  
> 
> So at 2000 RPM, 30 degrees=2.5ms.  This seems to jive with my ecm
> benched scope readings.
> 
> Shannen
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