I have recently had a JRSC installed on my B18B1 along with CRV crank pulley and am tuned with an AEM EMS. My plugs currently have about 2500 miles and have been keeping an eye on them for running lean.

The photos below are not from a full throttle pull, but just cruising so they won't be showing some of the signs of detonation.

When cruising my AFR is about 14.7 and under full throttle it's around 13.2-13.5. My EGT during cruising are right around 1400F and under full throttle around 1200F.

I do no believe that I have any detonation, it's just that the plugs look almost new. They are NGK ZFR6F-11. Stock are ZFR5F-11.

Should I be looking into 1 more step cooler spark plug (ie. ZFR7F-11)? Or should I do a full throttle pull and recheck?

 

I know when i got my setup tuned, B18b JRSC, they set me up with the ZFR7F-11 plugs.

 

I would like to see them a little more tan than white. Guess I will have to look into a 1 step colder plug.

Any comments on Iridium? Or just keep the V-power?

 

it needs to be richer at wot.