ok well how can i benefit from these on a n/a setup?


or will i loose power

 

Most likely will lose power, the colder plugs are ment for higher compression (built n/a motors), or forced induction.

 

It will be a net power loss.

The engine operates at maximum efficiency within a narrow temperature range band. By stepping to a colder plug, you're effictively dropping your combustion temperature 70 - 100 C. A lower temperature = less temperature difference between intake air temp and combustion temp = less power.

You only need to step to colder plugs if you're raising the internal engine temperature above optimal. This is only for forced induction applications or if you're going with higher compression pistons n/a.

FYI, iridium plugs won't make any more power than standard copper ones, they'll just last longer before you need to clean / replace them. If you need to swap, I recommend NGK V-Power plugs. They have an anti-corrosion coating and the V design gives a smaller electrode surface area for greater charge density without the added cost of iridium.