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On 15 Sep 2002, at 21:23, Ben Doughney wrote: > on 15/9/2002 6:16 PM, Jim Adney at jadney@vwtype3.org wrote: > > > If the vac advance has ANY effect at idle, the vac hose is hooked up to an > > inappropriate port and will not do the right thing for you. In that case, you > > are > > better off leaving the vac advance disconnected and just using the > > mechanical advance part. > > > > The dual advance dists have a vac retard which is expected to do something > > at idle. This is as it should be. > > So on the original distributor, would it have had a hose going to the port > above the throttle for the vac. advance and another to the port on the > manifold for the vac. retard? Most years which have both vac and mech advance don't have the vac retard. The vac advance connects to a port drilled into the venturi. I haven't seen carbs made for the vacuum retard also, but I suspect that the retard port would be drilled into the throttle body and would be specially placed near the butterfly valve. Placement of this would be rather touchy. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/