Nope. Champions have always done me just fine.
It takes some effort to get anything to contact a piston in a stock 225. Even large cams & o/s valves, the piston is soooo far down in the hole,....the tip on the spark plug'd have to be 13/16" longer to get close, lol! By that time You'd realize the intake valve has collided with the plug 1st...., even with a -0- deck piston the ground electrode on a stock plug is about 5/8" from the deck surface of an unmilled head(on the plug's centerline), so no worries there!!They are extended tip plugs. They won't hit the piston right? 74 -225
I used Autolites in My "Killer6", stock EI box, recurved dizzy w/the mech adv limited, Accel coil. I can tell You 1st-hand, Champion had a less-than-stellar rep in the late '80's-early '90's, They allowed a ton of sub-standard "2nds" product to be sold at discount stores. For a fact. More than a few put a fresh set of Chumpions in & the car would barely run/idle. One in particular was pulling His hair out, as He'd fixed a cable terminal, & the Mallory cap's spring-loaded button had stuck "up in" twice before on Him. Nope. I told Him to toss the old plugs back in, & voila! Some of Us have long memories, & trust is difficult to win back.Hey Charlie.... Champion..... screwing? Huh? That's how plugs go in , they screw round and round.
No matter the brand.
One combo that I have NEVER had luck with is ACs in a mopar. Tried it a few times when they were out of the right champions for what I was driving, every time I wound up with an overpowering whine in the speakers whenever the radio was on.
2 extra turns would've cut clean through the tube, they ain't that thick, & 2 turns of a 1.25mm thread is almost .100". Most likely the the thread/barrel of the NGK engaged the threads all the way to the chamber surface, cleaning the carbon off on their way through.Put the NGK's ZFR5N's in today. Love the extended tip, and motor runs great. I did not like that the base of the plug was smaller in diameter. I tightened them and they got kind of tight and then went in a couple more turns to finally tighten properly. I wonder if they pushed through the end of the tube a little because they are more narrow? Engine idles a little better
Sounds petty. I replaced my spark plug tube gaskets which negated the gap problem. I threw the napa box in the recycler. I can retrive it. The gaskets can easily be made from flat cork as well.2 extra turns would've cut clean through the tube, they ain't that thick, & 2 turns of a 1.25mm thread is almost .100". Most likely the the thread/barrel of the NGK engaged the threads all the way to the chamber surface, cleaning the carbon off on their way through.