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Pinging...?

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Old Apr 29, 2001 | 04:58 PM
  #1  
Little GTA's Avatar
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From: Destin, FL
Pinging...?

Why does this happen? What causes it?

I was going to practice take offs and see what was better with my street tires (1100 rpm or idle). Well starts pinging, then stops...while power braking.

BTW:1100rpm is close to breaking my tires loose.

93 octane...hypertech chip...6 degrees initial timing...

Why pinging? need better gas? engine just sucks, or what?



------------------
89 GTA Trans Am L98
Wins: 2 Early 90s Stang GT, 4 wheeler, Chevy Malibu
Losses: New Camaro...bastard
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Old Apr 29, 2001 | 05:14 PM
  #2  
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Usually the timing is too far advanced. Pinging is also called detonation. When timing is too far advanced, the spark prematurely causes the air/fuel mixture in the cylinder to combust which forces the piston back up while it is on it's way down. If you put the timing back to 4*, it will probably stop.
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