Thoughts on my sparkplugs?

[TurboTapin]

I would love some other opinions on reading my plugs. For reference, these are NGK R7436-8 on 94AKI Pump gas & 50/50 WMI.

Cylinder 6 starting from the right. Although EGT's are equal across cylinders, 6 seems to be running the hottest. I may add fuel to that cylinder. Cyl4 (Center) seems to be the darkest. Either too much fuel or possible oil? 

Cylinder 1 starting on the left. 

Cylinder 1 starting on the left. 

Edited October 2, 2024 by TurboTapin

[GTSBoy]

Has this got an FFP?

[TurboTapin]

1 hour ago, GTSBoy said:

Has this got an FFP?

Yes. Greddy intake. I put the injectors that flowed the most in order from cyl 6-1.

[GTSBoy]

Yes, well, then the possibly lean(er) look of #6 makes sense.

#4 looks oil wet, not rich.

[TurboTapin]

1 hour ago, GTSBoy said:

Yes, well, then the possibly lean(er) look of #6 makes sense.

#4 looks oil wet, not rich.

I'll add 2-3% more fuel to cyl6 and recheck the plug again afterwards. As for Cyl4, I also believe it's oil unfortunately. Valve seals are new and motor doesn't smoke on startup or ever really so I'm presuming it's ring related and only smokes slightly at WOT. I'm currently speaking to my engine builder and at his request, just sent the same spark plug photos, my target AFR tables and a few logs. We'll see what he says tomorrow. 

Engine still runs great, so I'm not overly concerned. At worst, I'll pull the block this winter and get rings checked and cylinders rehoned. Thanks again!

Edited October 3, 2024 by TurboTapin