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Re: [T3] Vacuum Advance and setting ignition timing


On 20 Nov 2002, at 11:20, jim wrote:

> I have a 1972 FI Engine (E-brain, matching parts) with MT and a 1968 single vacuum adv.
> distributor.  Since I do not have the adv./retard 72 dizzy, I time it like a 73.  
> 
> When I disconnect and plug the vacuum hoses, the idle drops ~200 RPM and the timing
> retard ~10-15 degrees.  Normally, with hoses plugged, I adjust the idle back to ~850 RRM
> and time the car.  I then re-connect the hoses and reset/lower the idle to 850RPM (since
> it raises with hoses connected again).

Forgive me, but I wonder if you have the vac advance hooked up to the retard 
vacuum port and are misreading the advance you get as retard. Otherwise I 
just don't see how this could happen.

How's your gas mileage?

-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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