Do you need colder spark plugs for nitrous?
While an unaltered engine will run best with the spark plug heat range originally installed, modifications such as adding a turbo or supercharger, increasing compression, timing changes, using alternate fuels, and sustained use of nitrous oxide may necessitate the use of a colder plug.
Is a colder spark plug better?
For NGK, Denso and Pulstar, the higher the number, the colder the plug. When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage.
What happens if you use a colder spark plug?
A “cold” spark has a shorter insulator and retains less heat at the tip end—but if it’s too cold, deposits accumulate and eventually the plug will short out (known as “fouling”).
Do you need a tune for one step colder spark plugs?
Basically, any modification that does not alter the overall compression ratio will not necessitate changing plug types or heat ranges. Generally, for every 75-100 hp you add, you should use a one (1) step colder heat range to be safe and avoid pre-ignition.
When should I run my spark plugs colder?
A colder heat range spark plug may be necessary if the ignition timing has been advanced to near the knock level. Higher cylinder temperatures near the knock level will bring the spark plug firing end temperature closer to the pre-ignition range.
Should I run a hotter or colder plug?
Air/fuel mixture: Lean air/fuel ratios raise cylinder-head temperatures, requiring a colder plug. Rich air/fuel ratios require a hotter plug to prevent fouling. Mixtures that cause the plugs to read lean may contribute to pre-ignition or detonation.
What is a one step colder spark plug?
Why go “one step colder”? Running a “colder” heat range spark plug will reduce temperatures in the combustion chamber by wicking more heat into the cylinder head. This reduces feedback knock and fine knock learning when running gasoline tunes. Recommended on ALL 2.5 WRX/STI making over 280 whp.
