timing adjuster
- Thread starter GraveBugger
- Start date
- Tags adjuster timing
what engine are you talking about here? There is such thing as adjustable timing for the GX200/clone engines.
REV WHEEL ADJUSTABLE TIMING KIT - S2
REV WHEEL ADJUSTABLE TIMING KIT - S2
Cars had adjustable timing because they had ignition distributors that directed the spark from one coil to each spark plug in sequence. All you had to do was loosen the bolt and rotate the distributor slightly to change the timing. Most cars now have a coil on plug design and distributors are obsolete. The spark for a car engine starts with the battery and alternator. Small engine don't have either and rely on a magneto to create the spark. Timing is controlled by the position of the flyweel (and magneto) relative to the crankshaft as it rotates past the fixed coil. Timing is changed by modifying the key that positions the flywheel on the crankshaft. There are some performance flywheels that are adjustable.
Model T fords had a timer, which is similar to a distribuor. A lever on the left side of the column changed ignition timing, while a lever on the right operated the throttle. Moving the "spark" lever up retared the spark and moving it down advanced the spark by moving a rod attached to the timer cover, just like a distributor can turn or how you can change the position of your flywheel on your minibike. Cars with distributors had vaccum advance or used fly weights (mecanical advance). Modern car engines ignition timing are controlled by a computer. In a model T for starting, the spark lever needs too be retarded before turning it over or it can kick back and either break your arm (if hand cranking) or break the starter. After the engine starts, the spark should be advanced quickly before the engine stalls. On cars without an electric starter, if your trying to start the car by yourself, this means running to the drivers side of the car to pull the lever down before it stalls after your out of breath from cranking your :censure: off. Anyway, as far as making a setup like this for a small engine, there is probably a way you could rig the coil up so it travels on a rail of some sort above the flywheel. looking at the flywheel, the coil would slide the the right to be retarded or to the left to be advanced. It would allow you to pull start your engine with the ignition retarded then after it starts you could advance it for racing conditions. Probably hard to fabricate but a neat idea.
advancing the timing
You can buy a offset keys to advance your flywheel 2 to 4 deg from most gokart parts suppliers for about $10 or make your own, try affordablegokarts: CRANKS & FLYWHEELS
If you have points you can change the timing by changing the gap on the points (Important item on old air cooled Porsche and VW engines).
You can also file or grind the actual coil mount holes (very IFFY on what the timing is when you finish).
You can buy a offset keys to advance your flywheel 2 to 4 deg from most gokart parts suppliers for about $10 or make your own, try affordablegokarts: CRANKS & FLYWHEELS
If you have points you can change the timing by changing the gap on the points (Important item on old air cooled Porsche and VW engines).
You can also file or grind the actual coil mount holes (very IFFY on what the timing is when you finish).