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Old 02-26-2013, 03:24 PM   #35
Can't_C_Me
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Yeah if the pistions are damaged you will smoke out the back a little sometimes. Doesn't really have to do with the oil return setup at that point. I didn't have a restrictor also and had to use good ol' Google to find the right size. I have a .62 also and going smaller may not be good as you can starve the turbo. Seems like HPS may have ran the car hard while tuning it. That's how I damaged mine.
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Old 02-26-2013, 04:28 PM   #36
scrming
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Originally Posted by butters View Post
noob question but how do pistons get damaged? I've seen this happen a few times on here.
most likely from running to lean (too much air and not enough fuel), this can cause things go get too hot, burning holes in your pistons. It can also cause pre-detonation, (pinging, knocking, etc.). The pistons in most modern vehicles, are not designed to tolerate a lot of pre-detonation.. and usually what happens is you end up cracking the edge of your piston off... the debris from that can then cause issue, with the valves... I'm guessing a cracked ring landing (edge around the top of the piston) is what happened here...

@SwitchBlade... sorry to hear... drove home from the track on 5 cylinders once... so I know about that sick feeling... ugh...
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Old 02-26-2013, 04:45 PM   #37
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Thanks for the empathy all. Told the little woman at lunch time. She seemed to take it all pretty well, but havent gone home yet , and she has no idea on how much it will probably take to fix it. Considering going forged while I am at it, but time will tell (there goes my tax refund). Will try to keep posted on progress.
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Old 02-26-2013, 04:54 PM   #38
scrming
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Thanks for the empathy all. Told the little woman at lunch time. She seemed to take it all pretty well, but havent gone home yet , and she has no idea on how much it will probably take to fix it. Considering going forged while I am at it, but time will tell (there goes my tax refund). Will try to keep posted on progress.
I know when I popped my motor in a previous car, we put a take out motor in... was cheaper than fixing the broke motor, even though the broke motor only had one cracked piston and bent couple bent valve... Do something like that and regroup and then possibly build up your broke motor..
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Old 02-26-2013, 04:57 PM   #39
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Thanks for the alternative. Definitely something I will look into.
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Old 02-26-2013, 05:28 PM   #40
butters
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Originally Posted by scrming View Post
most likely from running to lean (too much air and not enough fuel), this can cause things go get too hot, burning holes in your pistons. It can also cause pre-detonation, (pinging, knocking, etc.). The pistons in most modern vehicles, are not designed to tolerate a lot of pre-detonation.. and usually what happens is you end up cracking the edge of your piston off... the debris from that can then cause issue, with the valves... I'm guessing a cracked ring landing (edge around the top of the piston) is what happened
Great explanation, thank you. Gonna have to keep a close eye on that A/F gauge now.
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