Pietenpol-List: Re: The timing gadget--more thoughts from an O.F.AGAIN!
Posted: Sat Jun 26, 1999 10:01 am
Original Posted By: CAho878935(at)aol.com
See? I TOL' you I'd screw things up! A clear cut case of unleashing my fingers while in the "dumb-a--" mode. Anyhow, here's what we gotta do to fix things:Print yourself off a copy of my original post. Read on down until you see the paragraph that starts "Next, turn the crank...: The very next sentence is where my brain went out to lunch. I gave you a beautiful description of the INTAKE stroke, not the COMPRESSION stroke, which is the next one. In the intake stroke, the intake valve is open, the exhaust valve is closed, and the piston is traveling down. So, take a razor knife, meat cleaver, band saw or whatever, and excise that sentence that describes the valve positions and insert this instead:"When the piston is traveling toward the top of its movement, place your finger over the spark plug hole. There should be a considerable amount of pressure, because both valves are closed, and the piston is compressing the fuel/air mixture for firing. (No wonder they call it the 'compression stroke'). As the piston travels past top center a vacuum is created, telling you that you've gone too far. Back up just a smidge, till there isn't any pressure variation and you're just about there."NOW you can go on with the rest, doing the pencil dance and all the rest. I'm sorry if I've confused any of you, other than myself. That's what I get for trying to speak intelligently after a fifteen hour work day.Ed________________________________________________________________________________
See? I TOL' you I'd screw things up! A clear cut case of unleashing my fingers while in the "dumb-a--" mode. Anyhow, here's what we gotta do to fix things:Print yourself off a copy of my original post. Read on down until you see the paragraph that starts "Next, turn the crank...: The very next sentence is where my brain went out to lunch. I gave you a beautiful description of the INTAKE stroke, not the COMPRESSION stroke, which is the next one. In the intake stroke, the intake valve is open, the exhaust valve is closed, and the piston is traveling down. So, take a razor knife, meat cleaver, band saw or whatever, and excise that sentence that describes the valve positions and insert this instead:"When the piston is traveling toward the top of its movement, place your finger over the spark plug hole. There should be a considerable amount of pressure, because both valves are closed, and the piston is compressing the fuel/air mixture for firing. (No wonder they call it the 'compression stroke'). As the piston travels past top center a vacuum is created, telling you that you've gone too far. Back up just a smidge, till there isn't any pressure variation and you're just about there."NOW you can go on with the rest, doing the pencil dance and all the rest. I'm sorry if I've confused any of you, other than myself. That's what I get for trying to speak intelligently after a fifteen hour work day.Ed________________________________________________________________________________