What should timing be at WOT?
What should timing be at WOT?
At WOT, the air and fuel are tightly packed and burn quickly so we don’t need as much timing. At 2,800 rpm at WOT, 32 to 34 degrees of timing could be just about right for a typical pump gas street engine.
What rpm do you set initial timing at?
Most stock distributors are set to get full mechanical advance at about 4,000 RPM. Brand new MSD distributors come with ridiculously stiff springs in them that don’t see full advance until upwards of 4,500 – 5,000 RPM. You want all of your advance in at about 2,400 RPM.
What will retarding timing do?
Ignition Retarding. 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.
Does advancing timing lean or rich?
as was brought out, the timing has little effect on rich/lean issues and even less on a computer controlled engine. the ecm looks at all of the parameters and calculates the needed corrections to a burned in fuel map.
What’s the spark timing on a ZZ4 engine?
Set spark timing at 32º before top dead center (BTDC) at 4000 RPM with the vacuum advance line to the distributor disconnected and plugged. This setting will produce 32º of total advance at wide open throttle (WOT). The HEI vacuum advance canister should remain disconnected.
Where to find factory ignition timing on SR20DE?
A sticker like the one pictured may be found somewhere in the engine bay, and the ever important factory ignition timing setting. For the SR20DE it is 15 degrees BTDC. For the SR20DE, the timing marks are as pictured. Only the lines are visible, so this picture is a handle guide to the actual values of the lines.
What should idle speed be on Nissan SR20?
Engine must be at normal operating temperature. Idle speed must be correct. Nissan ECU’s use IGN timing to trim idle speed. If idle speed is too low the ECU will add timing, if it’s too high then it will pull timing back. In reality timing affects idle speed – and idle speed affects timing.
What do you need to know about the SR20 engine?
***All information refers to S13 engines unless specified otherwise.*** 1. IGN timing adjustment 2. Throttle Position Sensor 3. Fuel Pressure Regulator 4. Idle Adjustment 5. Vacuum Lines 6. Fitting a Consult Port 7. Z32 Airflow Meter fitment 8. Fuel Pumps 101 9. Cleaning your Airflow Meter 10. Changing Injectors 11. Blow-off Valves 12.