ripper

This is what i pulled out of my engine after second run at raceway pk sat. http://www.fquick.com/pics/viewpic.php?id=376 Anyone know what caused this. Also my motor took a crap. Poppin and missin. Oh yea that shiny stuff on the threads is part of my head.

bumpinwheels95

when was the last time u changed them>? could just have been thier time to shIITT the bed

ripper

I changed them that morning look close its a brand new plug

5speedstang

thats what top fuel dragsters do and they desel down the rest of the track

Colorado_Mustang

I've seen that on my '71...be lucky if that's the only damage.

blownbayou

12lbs of boost, cool weather and an average (if any) tune........That my friend is the result of DETONATION!!!! Need another tune and run race gas at the track.

Later

stang2000

What type of plugs? Looks like you might have had the wrong type in for your ap. Wrong temp range.

draymer

Detonation, pre-ignition, timing problem -- you are lucky it wasn't worse.

Check your octane (at the track, you should be running race gas, stay the hell away from octane boosters), get your timing checked and get a professionally done tune when you have race gas in the tank (run the tank nearly dry, then fill up with race gas).

-- Dave

droptoppony

Thats exactly what is was...poor tune or not enough octane...

oxfordgt

I think you need to pull your heads and look inside. Its a very good chance you messed something up. Plus that broken piece may have reaked havoc in the cyl.

You either gapped the plug wrong or have pre ignition. That is not a sign of detonation.

This is what detonation looks like


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