I haven't yanked them to check yet. I will when I get a chance.
If they're black and the cyl. head is already that hot, I'd be freakin scared to lean it anymore fearing nukuler melt down.
Right now, I think my mileage suks. Will fill up today and check. I've got the Don here, so we'll put our collective noggins together and come up with a guess of what to do.
Chief
I can add to that fear.
I have a complete stock CUSE2. The AFR has to be around the 2007 EPA Emission Specs. The following numbers are from yesterday's run. The IR was a Raytek Minitemp.
The degree are in F. The plugs are 6R12's with Syn3 Oil .
Front and Rear Temps measured at sparkplug base. Oil temp measured with digital stick. Ambient air measured with Raytek(some shaded area nearby).
Front Cyl Rear Cyl Oil temp Ambient air
291 343 220 85
267 322 216 96 (After 10 minutes engine off)
320 392 256 94 (After Immediate shut off)
307 388 243 84
FYI