I have posted some pictures of the plugs from my truck it has a ported blower, 6lb lower, Kooks headers, JDM Cat Back, JLP airbox, C&L intake elbow, oil seperator, and a snow performance kit, and an SCT custom dyno tune. The plugs are NGK TR6's all of them have this grayish to VERY light tan.
The plugs look to be lean to me....
any thoughts would be helpful.
I have also included my dyno chart.

 

They actually don't look too bad - you have to remember - you're driving around with the PCM trying to keep it at 14.7:1 a/f ratio (lean) and the only times it'll vary from that is in open loop (WOT). If you want a good read on the plugs for WOT, go to the track or dyno, make a WOT pass and shut down immediately and pull the plugs - you'll get a better reading that way.

Bird

 

I was thinking along the same lines.... but wanted to be sure that the motor wasn't runnin way too lean. I found NO aluminum particles so I figured that is was the PCM and not the tune.
Thanks for the information.

LTN Dave

 

+1....mine looked to same way when I pulled them out before going from Steig ported blower to KB and switching to BR7's. My tuner said it was the PCM trying to stay lean. Went to track...WOT....pulled plug. Good to go.

 

Thanks for the info I'll try that... I have some new parts so I'm going to have it redynoed and I'll check the plugs then.

 

They look fine. Looks like they are reching the proper tempature to me.

Rich

 

I say that they look a touch too lean. The plugs shouls have a bit more "toast" color.Your A/F's look good, though. Odd.

 

Possibly I should go one heat range colder???