What can bend the Spark Plug arm??

[Whipz]

Okay, here is the story. I have a 2005 SRT, Paxton running about 8lbs boost.

I ordered spark plugs from Sean Roe and they sent me a set of Bosch 'Super Plus' FR8DC plugs. They came gapped at .32, but they were blowing out, so I closed the gap down to .28 and they ran much better. I normally run the street track, but took the car out to the drag races last night. After my third pass, I noticed the car was running really rough.

I pulled the 5 right side plugs out today to see if any were fouled. Two of the plugs were black, and then on closer inspection I noticed that the GAP on both of those plugs was basically zero. The arm isn't quite touching the electrode, but I don't own a feeler gauge thin enough to fit in there.

What can cause this to happen?

The only thing different about yesterday is that I was running a slightly lower octane (90 instead of 91) and I had a bottle of Octane boost in the tank.

Thanks
G

 

[PaViper]

plugs too long and the piston is smacking it

 

[plumcrazy]

i dont think detonation would do that. any new noises coming from the engine ? ticking sounds ?

 

[Whipz]

Nope, no new sounds, no ticking or anything.

 

[musclenutz]

plugs too long and the piston is smacking it

+ 1 ...same thing happened to me years ago. plugs to long.