Why does timing need to be set properly?
Typically, timing will need to be adjusted due to the normal wear of moving parts in the ignition system. One degree may not be noticeable at idle, but at higher speeds this can cause the vehicle’s ignition system to fire a little early or late, which will decrease overall performance of the engine.
Does timing affect AFR?
Increasing Ignition Timing generally increases torque, which increases the fuel consumption at that load point… WHICH, will require more fuel to sustain a given AFR. That’s why when you are tuning, you tune the AFR, tune the timing…then yu have to go back and touch up the AFR Curve.
What’s the best way to set your timing?
It shouldn™t take much rpm to peg out the advance without the springs installed. With an adjustable light set at 36 degrees, align the stock timing marks with ﬁ0ﬂ when the timing is ﬁpegged out.ﬂ With the non-adjustable light, align your new 36-degree mark with ﬁ0.ﬂ Rev the engine a little to make sure the timing will not advance any further.
What happens if the timing is not set properly?
When he timing is not set properly the car may experience hard starting, low power or bad gas mileage. Setting the timing is normally an easy task, but sometimes the manufacturer’s timing marks are missing or damaged.
What’s the minimum timing for a vacuum advance?
1) Reduce the minimum timing (initial) to a point that 35is achieved by the above tests. Set up the minimum timing procedure and retard the distributor to a number less than 8, then re-measure everything again. Keep adjusting and measuring until the number is achieved. OR; 2) Reduce the Vacuum advance to a point that 35is achieved.
When does ignition timing need to be adjusted?
A good indicator that ignition timing may need to be adjusted is when the engine runs too lean (too much air, not enough fuel in the fuel mixture) or too rich (too much fuel and not enough air in the fuel mixture).