What kind of distributor does it have on it? Does it have a vacuum chamber or not? If it doesn't, those need to be set so they are 28 to 32 degrees BTDC at 3000 to 3500 rpm. The BEST dizzy I've found is the SVDA which you set much like a centrifugal distributor (that has no vacuum chamber) with the vacuum line plugged and once you set the timing, you plug in the vacuum chamber. It pulls the best of any distributor I've ever found.. The key with a VW isn't setting the timing at idle. It's setting it for the maximum amount of advance possible at RPM (when the advance curve peaks out and there is no more advance left) so that way you don't accidentally overheat the engine.
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