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On 8 May 2002, at 10:25, Simon Glen wrote: > Jim Adney wrote: > > The rule of > > thumb for VW tuners has always been to avoid going over 30-32 deg of max > > advance (not counting the economy vacuum advance incorporated in > > mech/vac advance distributors.) > > > > I'd suggest checking that you were within this limit when you're done with > > your testing. - > In fact, after setting the timing in this way, I have in each case checked > the static timing again back at home and found that for the VW411 (an > AP series engine) it is at 10 degrees BTDC and for the Westfalia (a CJ > series engine) it is about 8 degrees BTDC. The static timing is your MINIMUM amount of advance, while the rule of thumb relates to the MAXIMUM amount of advance. The max = static + (total crankshaft advance given by the mechanical advance.) This TOTAL is the number that should not exceed 30-32 deg. If you don't know what advance the dist gives you have to rev up the engine and watch for the peak and measure it somehow, or use an advance reading timing light. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/