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123 distributor timing

Posted: Tue Mar 18, 2025 9:52 am
by advinnie
Hi all. I’ve just got my hands on a used but working 123 distributor. I got it all running and starting looking at the ignition maps installed on it. There is only one called ‘stock svda for Vw ‘ but the max advance is set to 28 BTDC at 3800 rpm.
So may question is does any one have a map I could copy including vacuum advance figures.
Cheers all

Re: 123 distributor timing

Posted: Thu Mar 20, 2025 12:51 am
by Bruce.m
You can download presets from their website, although limited options.

The “best” timing depends on the engine specs. You could copy a 009 curve as a baseline and add vac advance on top, if that suits the engine.

I add a bit more advance after the peak torque when volumetric efficiency drops away.

Re: 123 distributor timing

Posted: Thu Mar 20, 2025 7:56 am
by advinnie
Thanks for the reply, I will go and have a look now at their website to see if i can download some presets