because Ford put in a sparkplug for normal driving conditions. problem is, I dont know anyone who drives a Mustang NORMAL we are all hard on the throttle, banggin' off the rev-liniter, doing mods. so IMHO, the heat range should be 1 step colder than Fords recommendations, but thats me
varies wth driving style. if I had to give you an answewr, I'd say no ill effects from 1 step down vs stock heat range. when mine was still a street car, I ran 2 steps down from stock, N/A and on the spray. I would have a set gapped at .045 to .048 for the street and N/A and at the track, a set gapped at .040 for the track wth Nytrous
varies wth driving style. if I had to give you an answewr, I'd say no ill effects from 1 step down vs stock heat range. when mine was still a street car, I ran 2 steps down from stock, N/A and on the spray. I would have a set gapped at .045 to .048 for the street and N/A and at the track, a set gapped at .040 for the track wth Nytrous
because Ford put in a sparkplug for normal driving conditions. problem is, I dont know anyone who drives a Mustang NORMAL we are all hard on the throttle, banggin' off the rev-liniter, doing mods. so IMHO, the heat range should be 1 step colder than Fords recommendations, but thats me
so would you say that i should change mine out, right now im running NGKtr55IX's but have a set of NGK tr6's 1 range colder gapped at .035 (bought them for a supercharger) would they help me out a bit?
on a power adder there is but on my N/A appts, I ran a tighter gap due to the fact that my car only saw 4k to 6k most of the time and I didn't want any problems associated wth too wide of a gap and ignition coil saturation time.
also the copper core plugs wear down quicker than platts and a tighter gap, which will open-up over time(due to wear), requires you to check and re-gap less offten, thus avoiding the dreaded tearing-up of the threads in the head from repeated removal & installation of plugs in the aluminum head
on a power adder there is but on my N/A appts, I ran a tighter gap due to the fact that my car only saw 4k to 6k most of the time and I didn't want any problems associated wth too wide of a gap and ignition coil saturation time.
also the copper core plugs wear down quicker than platts and a tighter gap, which will open-up over time(due to wear), requires you to check and re-gap less offten, thus avoiding the dreaded tearing-up of the threads in the head from repeated removal & installation of plugs in the aluminum head
I see what you're saying... if I switched from Motorcraft plats @ 0.054" to the AGSF-22C @ about 0.048", would I even notice a different how the car ran? They're cheap enough, I'd try it out if you thought it would be worth the 1/2 hour of my time to change them. I do have a sort of upgraded ignition, accel coil packs + new motorcraft wires