What is the result of excessively advanced ignition?
With excessive advance, the engine will be prone to pinging and detonation when conditions change (fuel quality, temperature, sensor issues, etc). Some engines (particularly turbo or supercharged) will not reach peak torque at a given engine speed before they begin to knock (pinging or minor detonation).
What does it mean to advance ignition timing?
Advancing your ignition timing means that the spark plug fires the air-fuel mixture in the cylinder earlier (measured in degrees Before Top Dead Centre) than it does out of the factory.
When does the distributor advance add timing based on RPM?
The mechanical adjust timing based on RPM where the vacuum adjusts timing based on load. Under high load, WOT, performance conditions there is almost no manifold vacuum so the vacuum advance does nothing. The only time the vacuum advance adds timing is at part throttle, low load conditions when there is manifold vacuum.
How do you set the ignition timing on a motorcycle?
The number one and number four cylinders’ timing should be set first. To find the firing point for these cylinders, the crankshaft should be rotated (see note below) until the piston on number four cylinder is on its compression stroke (a plastic drinking straw placed through the plug hole onto the piston works well).
How do you check your car ignition timing?
Shine the timing light onto the bracket with the timing marks and very carefully rotate the cam angle sensor (CAS) until you hit the desired angle (in this case two notches to the left which means you’ve hit 14 degrees). All you need to do now is to tighten the cam angle sensor bolt back up and check that the angle still reads 14 degrees.
How do you set ignition timing on a cam?
Set the crank so, according to the degree wheel, you are at the cam manufacturers specified degrees of ignition timing before the piston reaches the highest point of its compression stroke BTDC. Put a few drops of Loctite™ on the tapered part of the crank and install the flywheel with the white timing lines aligned. DO NOT USE A KEY!
What do I need to advance ignition timing?
The tools you’ll need are a couple of spanners, some wire, a screw driver and, importantly, an inductive timing light. A general rule of thumb is that you can advance the ignition timing of most cars with a distributor cap, including older Hondas and VWs.
What happens when you advance camshaft timing in a car?
However, if too much pressure builds up, extreme heat can cause pinging (detonation). Advancing cam timing can require the use of higher octane fuels in order to avoid this.
What’s the difference between advance and advance ignition?
Not to be confused with ignition timing advance, advancing a camshaft will change the timing of the valve events in relation to where the crankshaft is positioned. Advancing ignition timing causes the spark plug to fire earlier whereas an advanced camshaft will cause the intake and/or exhaust valves to open and close earlier in the engine cycle.