Timing - again

[Dirk Wright]

On Sat, 14 Sep 1996, talltom wrote:

 I manintain that much bigger > differences than show here are available
in the real world.(on track) Having > blown > engs using the knock method,
it leaves me a little less than impressed.  It > still > seems that the
trick is finding the sweet spot, with knock only useful for a > message >
telling you which way to go, and that you need to go a ways. 

What about the technique of using a vacuum gauge to determine optimum 
timing? On my old 914, that's what I use, and it jibes with the crank 
markings (which are really hard to see, hence the alternative method). 

Briefly, the method is to connect a vacuum gauge and adjust the timing at
idle until a maximum reading is found on the gauge, then stop. If you
continue to turn the distributor, you'll find that there's a plateau in
the reading. I was told that the best timing was just when the plateau was
reached. Seems to work for me. 

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Dirk Wright 					            wright at uspto.gov
"I speak for myself and not my employer."               1974 Porsche 914 2.0
"A real hifi glows in the dark and has horns."            1965 Goodman House
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