Thread: Ignition Timing
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e170drvr e170drvr is offline
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Join Date: Sep 2006
Location: Evansville IN
Posts: 261
Fred, Yes your post was clear on how you set up with the hoses. I'm guessing you have a 930/66 motor. If that is the case the ignition timing according to the factory workshop manual for 930/66 is 29 degrees +/- 1 degee BTDC vacuum hose disconnected. and then for checking again 930/66 2 degrees +/- 2 degrees BTDC at 900 +/- 50 rpm. What I was unclear on is say you measured 6 degrees retard with the hand pump you talked about. are you setting the timing at 35 degrees BTDC at 4000 rpm, with the knowledge that the boost pressure retard will pull it back to 29 degrees BTDC. I just think that might be a bit too much advance. But again the idle timing is supposed to be at 2 BTDC 900 RPM I think you said you are happy with that for off boost response. If you need any of this stuff from the workshop manual, I would be happy to send whatever you need.
87 930 Coupe Red, K27S, Kokeln IC, Rarlyl8 Headers system, Tial 46MM, .9 Bar. "Lola"

81 911SC Coupe Guards Red, Stock. "Zippy"
Old 02-13-2009, 06:34 AM
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