What should the gap on my spark plugs be?
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
What is the gap on NGK Spark Plugs?
These plugs are pre-gapped at . 044″. Do not adjust gap. Iridium IX – For forced induction (supercharged/turbocharged), we recommend the Iridium IX.
What happens if the spark plug gap is too small?
The Spark-Plug Gap If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency. A spark-plug gap gauge both measures and adjusts the gap and is inexpensive and simple to use.
How is plug gap calculated?
Measure the existing gap of the spark plug. Using your gap gauge or feeler gauge, run the tool through the electrodes to determine the measurement. Take note of the measurement and compare it to the recommended setting listed in the owner’s manual.
What should the gap be on a brisk spark plug?
Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. Also, the spark plug gap should never exceed .055″ unless pre-set by the manufacturer. Most Brisk and other manufacturer sparkplugs are preset to around 0.75mm – 0.8mm.
How often should you change the spark plug gap?
The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008″ in either direction. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage.
How big is the spark plug gap on a Promod Turbo?
Some applications such as ProMod turbo cars using M1 fuel frequently run a spark plug gap as small as .012″, even though they are equipped with some of the highest output ignition systems providing in excess of 60,000 Volts high current and high mJ power output.
What does a spark plug gap gauge do?
A spark plug gap gauge is a disc with a sloping edge, or with round wires of precise diameters. It is used to measure the length of the gap between the ground and central electrodes. The simplest gauges are a collection of keys of various thicknesses which match the desired gaps. You simply need to keep making adjustments until the key fits snugly.
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