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New owner of 911SC
11-27-2001, 08:37 AM
I have an 80 911SC 3.0L and wanted to know if some one can tell me if you can advance the timing on 3.0 and how much. Is it best just to leave it at factory specs.

11-28-2001, 01:50 PM
From what I've read advancing the timing is an effort of diminishing returns... Consesus opinion, leave it at factory spec.

New owner of 911SC
11-28-2001, 03:40 PM
Thanks Dave

Dan Brosman
12-15-2001, 02:21 PM
New Owner
I find that setting the igition at about 12 degrees BTC at idle (1,000 RPM)with vacuum disconnected, will give you substantially improved throttle response. Be sure to check out the dist for correct operation. ie. the centrifical advance mech, the retard vacuum control and on the "dual" vacuum units the vacuum advance.
Also be careful not to exceed about 32 degrees total.
I had one customer who complained that his car just didn't have the "snap" that it had after he had it tuned-up at his local shop. Come to find out the local shop had reset it to "factory specs"

Tom Reynolds
12-21-2001, 02:17 AM
Advancing the timing typically gives you a boost in low end, but hampers the top end speed. Watch the octane rating, you might get detonation if you're not using the correct octane if you advance the timing.

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