What Causes this Piston Damage?
04-06-2010, 06:47 AM
#22
TECH Fanatic
Thread Starter
Join Date: Dec 2008
Posts: 1,016
Likes: 0
Received 0 Likes
on
0 Posts
I will try and send him the tune file and also post it here.
Damage is already done. But I want to know the cause, not to blame anybody, but to avoid having it happen again.
I am just woundering if it is tune, why did it wait 6-months. I have stepped on it several times but not for long duration. The guy driving it was on a 100 mile trip on highway. I cannot tell how he was driving it.
Last edited by Denali08; 04-08-2010 at 02:02 AM.
04-06-2010, 08:03 AM
#24
TECH Senior Member
iTrader: (6)
Join Date: Jul 2005
Location: Decatur, AL
Posts: 5,257
Likes: 0
Received 0 Likes
on
0 Posts
Those plugs in the pics are pretty much ate up but look at the others. A sign of detonation is chipped/broken porcelin and brown speckles on the white porcelin.
Someone else driving it makes sense. It takes HORRIBLE detonation to do that to forged pistons. Someone with some sense about them would lift out of the throttle way before that happened. That took someone staying in it with all kinds of horrible noises and shaking happening. Sorry for your loss.
Someone else driving it makes sense. It takes HORRIBLE detonation to do that to forged pistons. Someone with some sense about them would lift out of the throttle way before that happened. That took someone staying in it with all kinds of horrible noises and shaking happening. Sorry for your loss.
04-06-2010, 08:07 AM
#25
Teching In
Join Date: Mar 2010
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Definitely detonation- I have a boosted motor here that looks identical- #5 and #7 too- this one happened under full boost when the fuel pump went wonky and had a lapse in fuel pressure- for some reason on these injection rail setups, 5 and 7 lose fuel pressure faster than the others.
