witch is the ideal spark plug for my engine (b18c)?
oem 11:1 compression,intake,exhaust.
i use ngk iridium but i heard that denso makes better spark plugs.
I heard that the ceramic of the ngk's burns and engine looses compression
Who ever told you that is a moron. That doesn't even make any sense, spark plugs have ZERO effect on compression.
I change my NGK's every 5000 km along with the oil and oil filter and feul filter
In Greece there many car experts tuners who give similar advice Tuning has became a fashion and poor knowledge and expertise followed unfortunately.
stick with ngk's man. denso are pure junk
I use denso Iridium i think there just as good as the ngk plugs there both to top japenese makes.
I use NGK's in all my cars, when I imported my Pulsar VZR it came with Denso's and ran like ****...put some 6EY's and totally transformed it.
Also run 7EY's on my 11.8:1 SR20DE.
a typical rule is to use one degree colder every 60-70 hps power increase. You''ll come across very different opinions regarding sparks. I've used both. With NGKs i think the engine runs smoother. Consider changing them every 25-30.000km top.