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Re: [T3] hooking up a timing light


On 27 Aug 2001, at 22:30, Russ Wolfe wrote:

> On Monday 27 August 2001 22:57, Jim Adney wrote:

> > Hook the red clip to the + term on the coil, and the black clip to
> > ground. The D+ terminal will have less than 12V on it at idle, so it
> > might not be enough to run the timing light (they vary, some will,
> > some won't.)
> >
> According to the Bentley and Without Guesswork book, the cut in speed
> of the T3 generator is 1450 rpm of the generator. Cutin voltage is
> 12.4-13.1. With a 900 rpm engine speed and a 2.3 pulley ratio, that
> gives an idle speed of the generator of 2070 rpm. Nominal output rpm
> of the generator is 2000 rpm. Therefore the generator should be
> putting out at least 12.4-13.1 at engine idle.

Hmmm.... Can't argue with this.  ;-)

I'll have to actually measure it again sometime. I had the 
impression that at idle we were below the cut-in speed and that the 
gen voltage was actually pretty low.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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