Is there a gap for a spark plug?
Is there a gap for a spark plug?
Pretty clearly, the gap for a spark plug can’t be correct for every possible engine in which it may be used. Check the gap, then adjust it for your application if necessary. The ubiquitous coin-style gap tool. Perfect for copper-core spark plugs. Not so hot for modern plugs, though. Read on. RevZilla photo.
When does a spark plug need to be widened?
Determine if the gap needs adjusting. If the tool passes through the gap without touching the electrodes at the appropriate measure, your gap is too wide. If you can’t fit it between the electrodes, the gap is too small and needs to be widened some. If it fits closely to the specified measurement, you’re safe to install the spark plug.
What is the pressure between the spark plug gap and ground electrode?
between the spark plug gap (center electrode and ground electrode). 2) Pressure in the combustion chamber at time of spark discharge – Depends on compression and aspiration of the engine. High compression engines and engines with forced induction have higher combustion chamber pressures at time of spark discharge.
How much HP can you gain by replacing spark plugs?
It is not uncommon to gain as much as 20 Hp just by replacing used spark plugs. Used spark plugs are hard to fire as the gaps are worn out, and insulation properties of the ceramic is compromised by solid combustion deposits and old fuel saturation.
Pretty clearly, the gap for a spark plug can’t be correct for every possible engine in which it may be used. Check the gap, then adjust it for your application if necessary. The ubiquitous coin-style gap tool. Perfect for copper-core spark plugs. Not so hot for modern plugs, though. Read on. RevZilla photo.
Determine if the gap needs adjusting. If the tool passes through the gap without touching the electrodes at the appropriate measure, your gap is too wide. If you can’t fit it between the electrodes, the gap is too small and needs to be widened some. If it fits closely to the specified measurement, you’re safe to install the spark plug.
How often do spark plugs need to be replaced?
In other words, if the gap is too large, the system must work harder to ignite the air/fuel mixture. Although, despite your best efforts, the gap will gradually increase over time. Typically, a properly gapped spark plug will last roughly 70,000 miles, depending on the material, before it needs to be replaced.
between the spark plug gap (center electrode and ground electrode). 2) Pressure in the combustion chamber at time of spark discharge – Depends on compression and aspiration of the engine. High compression engines and engines with forced induction have higher combustion chamber pressures at time of spark discharge.
