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On 2 Sep 2003 at 12:33, Dave Hall wrote: > > That's not the correct way to set these distributors. VW really wanted you to > > set the timing to the spec that it would jump to as soon as you give it a > > little gas. We mimic this condition by removing the retard hose. > > VW practice with the twin vac and carbs is to leave hoses on and use TDC - > amounts to the same thing I guess, but is easier as you don't get the problem of > the rpm change when a hose is removed as there is with the FI and twin vac can > method. Okay, I was guessing that they would have chosen the same technique for carbs as they did for FI. The FI way removes the uncertainty in the amount of retard from the "tolerance buildup" of the final timing setting, but it's certainly a LOT easier than the FI method with all its idle speed adjusting. Perhaps VW did it this way because readjusting the idle speed was not a big deal with the FI, while with the dual carbs it was a VERY big deal. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org