The Ford Barn - View Single Post

Ak Sourdough · 01-02-2021, 03:16 AM

To answer the non electrical part of the question, the engine will stop on the compression stroke of whichever piston is coming up when the flywheel no longer has enough inertia to overcome the resistance of compressing the air in the cylinder. The highest compression will be at the top of the cylinder, so it will very likely always stop near the same piston location.

If you mark the crank pulley every time the engine stops there will only be 2 marks on the pulley and it will look like it only stops in 2 places 180 degrees apart. Each mark will be the compression stroke for cylinders 1 and 4 or 2 and 3. Being a 4 stroke engine it takes 2 revolutions to make a complete firing cycle, 720 degrees. 1 and 4 will have the same mark, but fire 360 degrees apart, same with 2 and 3.
Clear as mud, huh?

01-02-2021, 03:16 AM	#7
Ak Sourdough Senior Member Join Date: Jul 2014 Location: Fairbanks, Alaska Posts: 126	Re: (Yet Another) Electrical Question To answer the non electrical part of the question, the engine will stop on the compression stroke of whichever piston is coming up when the flywheel no longer has enough inertia to overcome the resistance of compressing the air in the cylinder. The highest compression will be at the top of the cylinder, so it will very likely always stop near the same piston location. If you mark the crank pulley every time the engine stops there will only be 2 marks on the pulley and it will look like it only stops in 2 places 180 degrees apart. Each mark will be the compression stroke for cylinders 1 and 4 or 2 and 3. Being a 4 stroke engine it takes 2 revolutions to make a complete firing cycle, 720 degrees. 1 and 4 will have the same mark, but fire 360 degrees apart, same with 2 and 3. Clear as mud, huh? __________________ I still have an excellent rememberer, trouble is my forgetter is so much better that it often overrides the rememberer.