Ignition Timing

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JimmyC
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Ignition Timing

Post by JimmyC » Mon Jan 28, 2019 5:11 pm

When I was young we use to set the timing on cars by advancing them until the engine knocked under full load then backed it off just a bit, like 2 degrees. Then we tried to start it and if it cranked hard we backed it off a bit more. Has anybody tried this?

Does anybody understand why the static timing is different with a hot vs cold engine?

Does anybody use a timing light?
Jim Chance
710M

All my post fully incorporate the Dunning-Kruger effect

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pcolette
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Re: Ignition Timing

Post by pcolette » Mon Jan 28, 2019 5:24 pm

I have used a timing light powered from a seperate 12V battery I keep on hand. Usually 3-5 degrees BTDC worked well for me. Now that I have the PinzSSI system, timing is set without the engine running per the instructions.
Paul C.
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'89 Puch 230GE
2002 MB G500 (For Sale)

boeing7873
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Re: Ignition Timing

Post by boeing7873 » Mon Feb 04, 2019 6:36 pm

I have the SSI ignition, and lost the ability to use the timing gun. Therefore, I use the technique you described... advance until it knocks, the come down a little more...
Works...
Jerome
CRJ Driver

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audiocontr
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Re: Ignition Timing

Post by audiocontr » Mon Feb 11, 2019 11:59 am

Agreed on SSI - i was able to advance a few more degrees than the SSI instructions state without issue.
1973 712m
(2) 1968 Haflingers 1 For Sale
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1979 Mini Ranger For Sale
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whitesik
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Re: Ignition Timing

Post by whitesik » Mon Feb 11, 2019 12:26 pm

I am confused. I thought the SSI was statically set at TDC, red light on, and the SSI module did the rest. No need to adjust anything else. Am I missing something?
75 Swiss 710K
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audiocontr
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Re: Ignition Timing

Post by audiocontr » Mon Feb 11, 2019 2:12 pm

it is, but you can advance a little past TDC and not find yourself in a ping state. i found it idled and ran better
1973 712m
(2) 1968 Haflingers 1 For Sale
1978 GMC Palm Beach
1979 Mini Ranger For Sale
1986 Corvette For Sale
2001 F250 Diesel and trailer
Company Cars
2019 Expedition
2019 F-150

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4x4Pinz
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Re: Ignition Timing

Post by 4x4Pinz » Tue Feb 12, 2019 7:45 pm

in the early models the SSI had a switch for on road and off road. you could advance it manually a little. not many used the option and it just made the system a little more complicated for little gain. I just run mine slightly advanced all the time and get a little better performance.

pinzinator
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Re: Ignition Timing

Post by pinzinator » Thu Feb 14, 2019 8:08 pm

I have it stated in the instructions that the timing can be advanced, just use common sense. By setting the timing at TDC, the curve advance follows the factory recommendation as close as possible. Advancing is OK, and is accomplished by rotating the module against the rotation of the timing disc (CCW), just like you would with a distributor, using the rotor as a reference direction. I set mine a few degrees advanced and it runs great.
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