I’m going to renew the spark plugs with NGK, is it worth doing the leads at the same time? Money not an issue, just need to know if ‘upgrading’ the leads to these is worth it from a performance pov
Before you bin the old leads do the dark under-bonnet test, some new leads are a triumph of Hype over function.
Run the engine in the dark with bonnet up and look for a leakage of blue sparks around the coils, leads and plugs.
No sparks is good. Job done.
ANY sparks at all are bad. Find the fault; be it high impedance plugs, duff leads, leaky coils, or simply contaminated terminations.
Edit. Thibor is right, I should have looked above the question. However the spark search is still valid, just a much smaller search zone.
the NC 2L dont have leads!
they have coils that sit ontop of the plugs
see
also you have to use a certain type of long life plug for the NC aswell
its advised that you change the plugs at around every 50 thousand miles
Thanks, racing Beat website is misleading
Just checked these out and realised that they actually are iridium electrodes.
I assumed before that ‘iridium’ was just a cool-sounding name chosen by the marketing guys 