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Antique Gas Engine Discussion

Fairbanks fireing order

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Old 06-14-2005, 07:56:06 PM
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Question Fairbanks fireing order

Does a fairbanks fire at TDC after the compression stroke or 10 degre's off of the compression stroke? i seem to have forgotten.
just like everything else.

i ask becouse im trying to set the trigger i have made for the model T coil...
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Old 06-14-2005, 08:49:04 PM
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Default Re: Fairbanks fireing order

Immediately after the compression stroke is the power stroke. That said, TDC between the compression and power stroke is the very LATEST that you would want the plug to fire. Most engines have a setting for allowing the spark to fire at TDC to prevent kickback when using a hand crank. Once an engine is running, you want all ignition to be at a certain amount of advance, or ignition to occur at a certain number of degrees Before TDC. Thus, if your engine is designed for 10 degrees, it would be ten degrees before TDC or during the last portion of the compression stroke just before the piston starts to go back out of the cylinder. The faster the engine runs, the more you need to advance the timing.

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