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Re: [T3] Vacuum Advance and setting ignition timing


I have a single vacuum advance dizzy from a 68 FI car, should there be any vacuum advance
at idle?  

> > I looked through the Bentley for a diagram of the hoses but there weren't
> > any. However, it did say removing the vacuum retard hose while the car was
> > running would move the timing/advance 15-18mm which is pretty close to what
> > my car does when I remove the vac. hose. 
> 
> Yes, but you have it connected to the vac adv, so the vacuum there at idle 
> should make the timing marks move to the left (advance) when you attach 
> the hose and move to the right (retard) when you remove the hose. This is 
> backwards from what the vacuum retard would do, which is logical when you 
> think about it.  
> 
> For these distributors, more vacuum gives more vacuum advance and more 
> vacuum retard (for those distributors which have the vacuum retard.) They  
> don't both get the same vacuum at the same time.  
> 
> -
> *******************************
> Jim Adney, jadney@vwtype3.org
> Madison, Wisconsin, USA
> *******************************


=====
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