I have about 45 hours on my stock plug.You think ishould change it out? And to the irrideum. Spelled wrong?
Help me on this phucker;hey md if it were as simple as a percentage the percentage would be the same. so if you had a 500 horse v8 and 100 horse single and the plug gave a 2 percent improvement it would be 2 hp for the single and 10 for the v8. anyways it depends on compression, ignition power, fuel used and the heat of the engine.
Are you referring to the indexing?wouldn't you need multi cylinders?