Planet 9

I was shopping around for plugs and found the cross reference to NGK being the BKR7EQUP. Anyone try these plugs or change heat ranges?

I installed the NGKs and car runs wonderfully smooth and she still has her get up and go!

I must say after a week of driving highway and traffic I am very please with the plugs! Fires up everytime, no misfires and pretty much smooth. This ignition set-up reminds me of my 528 BMW with direct coils. So tempted to remove the torx screws that hold the coils and change them to regular bolts to make it easier to remove next time. I recall BMWs using the NGK four prong plugs and was just tempted to try it on the Cayman! While I do not have any data or dyno to prove my results it just could be placebo effect, but none the less no check engine light and stumble does it for me!!!

Question for everyone, say I install hotter plugs for instance going to a "6" heat range (NGK- Lower the number, the hottter the plug) and install a LN Engineering thermostat. Would this be any benefit?

How will you know if the hotter plug works? If the ECU pulls timing because of preignition on the plug that then causes detonation, how will you know that it has pulled timing?

The only reason to go to hotter spark plugs is if you are getting fouling, (oil or anything else). Too hot a plug will lead to preignition like wulfgang implies. The plugs with several legs are supposed to provide a beter, bigger spart to ignite the charge more completely. Is that true or just a marketing ploy, I do not know. I have never seen any convincing evidence of that fact. Does that mean it is not true, no.

If anyone has any info on multi leg (electrodes) plugs Please jump in!

__________________
Having fun in Puerto Rico

My OE 4-electrode plugs looked like new when they were switched out for the Bosch 3-electrode design plugs that TPC uses in all their cars for performance, durability, or whatever other reasons.

Good question Wulfgang! I would wager a peek through a scan tool would give some idea of what the car is doing. Just wondered if anyone has tried this and experienced any positive or negative results. I recall putting a notch above on another car and the response was great. I was able to advance and retard the distributor manually to adjust though. If it was doing something else harmful to the engine I did not have any data to support it, but that thing peeled out in second gear! Just tap the pedal and she was geared to go!