Goodbye piston...carnage pictures inside...
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by hitmansws6
Probably not detonation. Most likely a case of too much cylinder pressure for the stock hypereutectic piston that it fatigued and shattered. You were making a pretty good amount of horsepower.
Talked to McCord and the cheapest route would be to slap in a set of forged JEs, ARP rod bolts, bore the block +.007, re-ring and re-bearing the shortblock. You can find a used 5.7 block for around 150. You could then spin it even higher and take advantage of the heads and cam setup you already have. He also suggested bumping up the compression while you're at it to get you in the neighborhood of 11.5:1. Maybe even have the crank turned. Depends on what it looks like once you get it completely torn down.
Talked to McCord and the cheapest route would be to slap in a set of forged JEs, ARP rod bolts, bore the block +.007, re-ring and re-bearing the shortblock. You can find a used 5.7 block for around 150. You could then spin it even higher and take advantage of the heads and cam setup you already have. He also suggested bumping up the compression while you're at it to get you in the neighborhood of 11.5:1. Maybe even have the crank turned. Depends on what it looks like once you get it completely torn down.
Most likely a case of too much cylinder pressure for the stock hypereutectic piston that it fatigued and shattered. You were making a pretty good amount of horsepower
I've run 12:1 setups with juice with no failure. But lost 2 motors to lean cylinders, 1 because of stuck nitrous solinoid and another due to failed injector.
Another main cause of stock block failure is rod bolt stretch which sends the piston crashing into the valve and if at high rpm can result in the carnage you see. Being it is neither #5 or #7 on this block, that could be the cause as well.
Originally Posted by Patrick G
Moved from Advanced Tech section.
Your damage is very common among nitrous and boosted motors. I've seen it for years. Time to go forged.
Your damage is very common among nitrous and boosted motors. I've seen it for years. Time to go forged.
Originally Posted by DONAIMIAN
I would go 383. Jason from thunder put together a mean little setup using 5.3 heads.
Originally Posted by Prerun4fun13
Did you run the car without a tune for any period of time, i have heard it isnt very good to run an engine untuned for along time.
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Originally Posted by TransAm578
What caused this to happen to yours?
Originally Posted by TransAm578
I think that I might try to go with an engine size that will complement the Trick Flow heads that I have already since it looks like we will be able to save them.
Teching In
Joined: Nov 2005
Posts: 25
Likes: 0
From: The Wild.
Originally Posted by H82BU
Can't do that....there is a huge hole in the right side of the cylinder wall...look at my last pic I posted and you can barley see it from the angle.
Originally Posted by PREDATOR-Z
I dissagree with that comment completely. i've used stock block in well over 550rwhp reliably for long times. When carnage like this happened (usualy #5 or #7) it is 80% of the time a lean condition. Those stock pistons can take a lot of abuse.
Originally Posted by mattraypharbor
Crapy...MAN am i gonna **** my self when my engine decides to pop....prob scare the living hell out of me when it goes.
what inj.s are you running?
from the start, reading all the way through this, I def. agree with the point predator brought up.
might want to test them and make SURE your inj. didnt lock up and cause that cyl. to go lean. these hyper. pistons are very brittle. as in they shatter into a million pieces when they let go instead of just crack or break.
from the start, reading all the way through this, I def. agree with the point predator brought up.
might want to test them and make SURE your inj. didnt lock up and cause that cyl. to go lean. these hyper. pistons are very brittle. as in they shatter into a million pieces when they let go instead of just crack or break.
TECH Fanatic
Joined: Mar 2004
Posts: 1,017
Likes: 0
From: Laguna Niguel, CA
So can a faulty injector (one w/ 130K miles on it) cause a STOCK motor to go so lean as to destroy a piston?
Does this mean that one day, because of a partially clogged injector, I will rev it to 5K rpms and have it go lean to the point of destruction?
Does this mean that one day, because of a partially clogged injector, I will rev it to 5K rpms and have it go lean to the point of destruction?
Staging Lane
Joined: Jun 2007
Posts: 52
Likes: 0
Originally Posted by TransAm578
The car was never run without a tune, although it took a couple sessions to get the tune where I wanted it to be.
As far as the tune, maybe we can make a trip somewhere and have it done when everything is complete......
