Ignition timing on porsche

Maireeka · Jan 8, 2005

Hey, I've got a Porsche 924 that needs the ignition timing adjusted. I'm going to buy a light tomorrow, and was wondering if anyone here could give me a general idea of how it's done, i.e. what to look for with the light, how a timing light works, etc.

I know that I'm supposed to look through a small inspection window for some kind of marks on the flywheel with the light, then turn the distributor to adjust the timing, but I've got no idea what the light does, which way to turn it, what exactly to look for, or anything else, for that matter.

So, my Z car pals, could one of you please give me a short class on what the heck I'm supposed to do with my timing light?

thanks,
Patrick

pavementpounder · Jan 8, 2005

the timing light is hooked up to the battery with the neg and pos leads, and the secondary lead goes to the number one spark plug wire.. the voltage in the plug wire will induce a flash for everytime the plug fires.. on the harmonic balancer ( not the flywheel) there are a series of marks, these will be spinning past the timing tab very fast while the engine is running. you aim the timing light at the harmonic balancer, and pull the trigger.. when the plug fires, there will be a flash, and you will see the timing marks.. find out what mark on the balancer is btdc, find out what timing should be, and move the distributor until the mark you see is lined up with the timing tab. buy a light, and just hook it up and point it at the dist. its self explanatory from there.... good luck

Ignition timing on porsche

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