Spark plug Reading Guru's

Hey guys, does it look like the new Accel "shorty" header plugs I'm swapping to will be a hotter plug than my previous NGK'S ? It looks like the ground strap is quite a bit longer on the Accel's. Accel p/n 0416-S. The NGK's are p/n BCP6E S.

The last pic is of the NGK'S after about 200 miles around town and 3 passes. Then I blew a hole in my header primary on pass #3 and had to "upgrade" headers. Now I need header specific plugs, and a custom built wrench to pull my plugs on the passenger side. by the looks of this pics I'm lean ..with too much timing to boot. I'm afraid the Accel plugs may exacerbate my lean condition. I know I can tune it out, just looking for some input from some more experienced racers.

Thanks, Dave

What fuel? Just a quickie id say its not lean honestly but need better pics of top and porcelain, also might change depending on fuel you use

So Cal 91 swill.. Holley 9380 850dp.. jets square 78's all around [ factory baseline ]. 10.3-1 , Promaxx heads.. Eddie copies. Performer RPM.
Orange box.. timing is all in 37° @1900 rpm.

when i'm comparing heat range between different plugs I measure how far down the porcelain goes in the body of the plug before it bottoms out. the shallower the colder; the deeper the hotter. I always prefer the tip as far in the chamber as possible without any interference with the piston or valves. I always measure ohms resistance.

Good info , thanks.. measure ohms from the plug tip to the electrode?

How much total timing does it have at WOT, also what is part throttle cruise timing?
I don't see any lines on the last plug on the ground strap for timing
I like bright and clean on my plugs, not brown or black and with debris on them

yep. I've seen resistor plugs run anywhere from 3500 ohms to 15000+ ohms. some resistance in the secondary wiring is good but I try to avoid anything around 10,000 ohms for the plug and wire. capacitive discharge ignitions need some resistance, inductive ignition seems to be fine with less.

on a magneto, over 5k ohms is bad for the coils, so ohms do affect how the plug runs