Well these are my NGK BCPR6EIX-11 Iridiums. I am running these in a D16a6 with about 10.5:1+ compression with 44psi of fuel pressure. I've had these plugs in my car for about 6 months. I pulled them today to swap them with BKR7E-11 NGK's. I've noticed how they are a bit white (lean). Does this sound normal for 44psi of fuel pressure?? I though 44psi was pushing it, but i guess not.

Any of you have any ideas what could be causing lean conditions?

#4 #3 #2 #1




Modified by RedRacerCivic at 12:26 AM 9/27/2007

 

hows the timing?

or try bringing it up to about 47-49psi and see what happens.