depends on what percentage of nitro you are running..the higher % nitro...the colder the plug.Bigger engines like the Axial .32 like 30% fuel and a medium plug..from my own experinces anyways.
depends on what percentage of nitro you are running..the higher % nitro...the colder the plug.Bigger engines like the Axial .32 like 30% fuel and a medium plug..from my own experinces anyways.