What should timing be at idle?

What should timing be at idle?

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. The initial timing should be 4 degrees before top dead center (BTDC).

What should the timing be on a 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 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.

How does retarding timing affect an engine?

Ignition timing retarding causes the spark plug to fire later in the compression stroke. The effects of retarding ignition timing include reducing engine detonation, which is combustion inside the cylinders after the spark plug fires. This is also known as engine knocking.

Where should I set the timing on my performance engine?

Most naturally aspirated engines like a total timing of 34 to 36 degrees BTDC, (Before Top Dead Center) AKA “Advance”. Nitrous and supercharged engines usually run less than that, unless you plan on blowing the heads off the engine or blowing holes through your pistons.

What should the timing be on a Mopar 340?

The second answer was nutin. It was worth 5 bucks to watch him beat that carb. Timing should be at 33-35 deg BTDC at 3,000 RPM w/vacuum advance disconnected, then reconnect it. This should result in around 10-18 deg BTDC at idle.

What should the timing be on a 340 Duster?

Motor is in a 340 Duster, Edlebrock Air gap, Holley 750, Mild comp cam, factory X heads and headman headers car runs and starts great. Timing should be at 33-35 deg BTDC at 3,000 RPM w/vacuum advance disconnected, then reconnect it. This should result in around 10-18 deg BTDC at idle. Click to expand…

What’s the difference between a 340 and 318 engine?

Valve covers for 340 engines were different than 318 valve covers. Since the 340 carb was a 4 barrel, it was wider and the carb linkages caused interference with the spark plug wires, so they raised the drivers side wire holder up about 2.5″ higher than the 318, to clear the linkages.

What are the intake valves on a 340?

The ’68-’71 340 ‘894’ casting X heads have slightly larger intake valves – 2.02 as apposed to the ’72-’74 J heads, with 1.88/1.60 inch valves. In ’71 – after the factory used up the X heads, 340’s received the ‘915’ casing J heads, retaining the 2.02 valves – for only that year.