What RPM should I set my Chevy 350 timing?

Setting the Timing on a Chevy 350 Engine
Setting the timing on a Chevy 350 engine is an important step to ensure optimal performance. The timing refers to the precise moment when the spark plug fires in relation to the position of the piston. Here are some guidelines to help you set the timing on a Chevy 350 engine:
1. Initial Timing: The initial timing is the base timing setting that determines the timing at idle. The recommended initial timing for a Chevy 350 engine is typically between 4 to 12 degrees Before Top Dead Center (BTDC). However, it’s important to note that the specific timing may vary depending on factors such as the engine’s configuration, modifications, and fuel type.
2. Idle RPM: The idle RPM for a Chevy 350 engine is typically around 700 RPM when cold. As the engine warms up, the idle RPM may increase to 1200 or more.
3. Vacuum Advance: When setting the timing, it is recommended to have the vacuum advance connected. This allows you to adjust both the vacuum and mechanical advances simultaneously.
4. Mechanical Advance: The mechanical advance refers to the advance you get from the weights inside the distributor. It is important to consider the mechanical advance in addition to the initial timing. The mechanical advance helps provide additional timing as the engine RPM increases.
5. Total Timing: The total timing refers to the combination of the initial timing and the mechanical advance. The total timing at higher RPMs, such as 3000 RPM, is typically around 38 degrees.
6. Adjustment Process: To adjust the timing on a Chevy 350 engine, you can rotate the distributor housing in one direction or the other. Turning the distributor counterclockwise will advance the timing, while turning it clockwise will retard the timing.
It’s important to note that these are general guidelines, and the specific timing requirements may vary depending on the engine’s configuration and other factors. It is always recommended to consult the manufacturer’s specifications or seek advice from a qualified mechanic for precise timing adjustments.
Remember, setting the timing correctly is crucial for optimal engine performance, fuel efficiency, and to prevent issues such as overheating and engine knocking.
I hope this information helps you set the timing on your Chevy 350 engine. If you have any further questions, feel free to ask!

How do I know if my timing is too advanced?

Clues that the timing is too advanced would be hard cranking, the engine tries to kick back when cranking, rough idle can be caused by too much advance, and detonation is another sign of too much advance.

How do I know if my engine timing is correct?

Your engine’s performance should be as smooth as a ballroom dance, but if you notice it stumbling, stuttering, or emitting an irregular rhythm, it might be a telltale sign of timing trouble. Misfires are like the misplaced steps of a dancer, disrupting the fluidity of your engine’s performance.

What is the rpm of a SBC total timing?

36 degrees total is the normal limit on a SBC. There are instances when you might want to exceed that, but it is almost always in race motors. At 2500 to 3000 rpm 36 degrees total (initial + mechanical) is fine.

What should ignition timing advance be at idle?

Most engines have between 5-20 degrees of ignition advance at idle. This is referred to as initial timing. What’s the difference between mechanical and centrifugal advance? As an engine revs up, we need to allow even more of a head start for the spark plug in order for complete combustion to occur.

How many rpms should a 350 idle at?

Re: At what RPM does your 350 SBC idle? Cold start: around 900 in park/750 in gear, after warmed up about 800 in park/and anywhere from 650-800 in gear.

Does advancing timing lean or rich?

Neither ! Advancing Ignition timing does not effect air/fuel ratio unless it’s extremely late that manifold vacuum pressure drops so low causing the map sensor, metering rods to enrich the fuel mixture. Cars equipped with oxygen sensors will maintain the same fuel/air ratio.

What is a bad idle rpm?

Typically, engines idle at about 600-800 rpm. Older engines may go up to 1200 rpm or more while warming up. But if the engine is revving up while idling, even after it’s sufficiently warmed up, you might have a problem. High idle speeds waste fuel, cause extra wear and tear on your engine, and can be unsafe as well.

What should timing be set at Chevy 350?

In most cases starting out with 12 degrees of initial advance is about right. However, that may result too much total advance, which should be limited to around 36-37 degrees so the distributor’s advance curve may have to be altered. How that is done will depend on the distributor you use.

Does RPM increase timing?

Total timing should increase across the entire timing map as the RPM’s increase, all the way until redline. This is due to the piston speed increasing, while the flame speed does not change. If the timing does not increase with engine RPM’s, then you are wasting power, and fuel.

What RPM should full timing be in?

3,000 rpm
Total advance should all be in by 3,000 rpm and will be the sum of the mechanical plus the initial timing as set at the distributor.