Question: What Should A SBC Timing Be Set At?

What should the timing be set at on a Chevy 350?

The timing can vary between 2 and 12 degrees BTDC, the recommended spark plugs are different and even the plug gaps vary.

In most cases starting out with 12 degrees of initial advance is about right..

What should timing be set at on BBC?

Set the timing to 14-16 with no vacuum going to the distributor. once the timing is set and locked down—-plug the vacuum line back into the distributor advance pot. Reset the idle and all should be well again.

How do I know if my ignition timing is too advanced?

How do you know if your timing is too advanced? Symptoms of incorrect ignition timing are poor fuel economy, sluggish acceleration, hard starting, backfiring, or “pinging” or “spark knock”. Too little spark advance will cause low power, bad gas mileage, backfiring, and poor performance.

How do you set total timing?

How is it set?Determine your desired total timing. … Set your Timing Light to your desired total timing.Start the engine. … Rev the engine past the point where your mechanical advance is fully engaged. … Watch the timing mark on the harmonic balancer using the timing light.More items…•

What happens if ignition timing is too advanced?

If ignition timing is too far advanced, it will cause the fuel-and-air mixture to ignite too early in the combustion cycle. This can cause the amount of heat generated by the combustion process to increase and lead to overheating of the engine.

What happens if timing is too advanced?

Advancing the timing means the plug fires earlier in the compression stroke (farther from TDC). Advance is required because the air/fuel mixture does not burn instantly. It takes time for the flame to ignite the all the mixture. However, if the timing is advanced too far, it will cause an Engine Knock.

What should timing advance be at idle?

In addition, the WSM says spark advance should be between 6 to 18 degrees BTDC at idle.

Does advancing timing increase idle?

If the base timing is retarded 5 degrees from spec the engine will become lazy, and harder to start. It will produce less power(torque) off idle and rev slower. Advance timing, and response increases, easier to start, more power(torque) off idle. … Some engines use the vacuum advance to advance timing at idle.

How do I know if my engine timing is correct?

Symptoms of incorrect ignition timing are poor fuel economy, sluggish acceleration, hard starting, backfiring, or “pinging” or “spark knock”. Too little spark advance will cause low power, bad gas mileage, backfiring, and poor performance. Too much advance will cause hard starting and pre-ignition.

Does advancing timing make more power?

Changing the timing value up or down changes the engine speed up or down for the optimum ignition timing. The engine speed operating range affects where the timing is the best. Increasing the timing advance raises the high-end power, reducing the low-end.

Will advance timing cause rich?

Not enough timing advance will only cause knock if you are already running too rich causing knock. So that kind of goes hand in hand. Bear in mind that while a leaner mixture can allow more timing, a leaner mixture also creates more heat, causing that extra timing to make some knock.