I use Denso Iridium IK20. They’re supposed to come gapped at .044, but didn’t - properly gapped, they’ve been excellent, though. I haven’t got a planned change interval - I’m going to pull them when I do the timing belt in a couple of thousand miles, and if they look good, they go back in. They should last a pretty while.mrbrian200 wrote: ↑Mon Jun 03, 2019 11:39 amOE plugs may not be the best possible 'configuration' that can be achieved, but reconfiguring properly goes beyond simply throwing a different plug under there. With something as 'big' as the spark plugs you need to take the car to a tuner to have the ECU software/maps customized - else at best you simply won't likely gain the full potential advantage of using those alternate plugs, or at worst you risk engine and/or catalyst damage.
As to remapping for spark plugs, I don’t think that’s accurate at all. Spark plugs aren’t “big” - they don’t facilitate more airflow, more injected fuel, higher pressures or alter timing. Spark plugs produce spark. With better plugs, you can get a more reliable burn at the correct time, and better power that way, essentially just giving the engine and ECU what they’re expecting will happen, when it’s expected.
If you add fuel or air, need a different load request curve or TCV duty cycle for boost build or onset, that’s a remap. Spark plugs not so much.