After reading a few threads on this matter,I felt it necessary to try and compile a list of everyone that has broken a piston.Here is what I would like to see:Only post
1 Your mods
2 Your tune
3 Your mileage
4 Your tuned mileage
5 AFR's if you have them
Please keep the posts to only those with this problem,there is plenty of discussion in the other threads,we should keep this to only fact gathering.

 

1) K&N Drop-In, CIA CP, Hahn IC, CIA catted DP.
2) Trifecta Switchable @ 22-23psi
3) ~30,000 miles at time
4) 10,000 miles (Installed at ~20,000 miles I think it was). Most driving in stock tune.
5) Seems to be low 13s to mid 12s, depending on RPM. (I'll have to double check this though)

Note: Even in stock mode, at low throttle (600s psi fuel), it'll sometimes randomly go rich and then swing lean and then go back to normal like nothing happened, all in about two seconds. Can't figure that one out. I think maybe something makes it suddenly see itself as going rich and then as it corrects, the original rich cause dissappears, and then it finds itself lean and corrects back. I've got HPT logs of it doing this reducing sine wave sorta thing on the STFT (didn't have AFR monitored at the time). It'll do it just randomly sometimes and does it with K&N or stock filter. If it's in only light vacuum (~780+psi fuel or so) or in boost, it sticks to 14.7 or it's assigned WOT AFR like glue.

 

how about for the lsj? lol

 

my buddy in my club had this issue. i dont know his miles or afr, but it was a brand spankin new 08

only mod was trifecta tune @ 30 psi.. (he asked for it that high, we warned him)

blew #1 piston. everything else was fine. he was tuned for a couple thousand before it happend.

 

Well kinda close Tyrone... LOL.. and I don't remember anyone warning me but it is all good. I did ask for the extra boost though.. that part is true.. After all who does not want extra HP.. Now back to the topic.

1 2009 SS/TC with Drop-In K&N
2 Trifecta Infiniboost @ 30psi
3 Had about 15k miles when it happened
4 Had about 9k when I got the tune
5 When we did the dyno, the AFR were mid to high 12s I believe. Dyno guy said they looked good, even though I got detonation on 2nd pull.

Note: I originally had the mild Infiniboost which was about 22-23psi. Unfortunately, I (like a crackhead wanting more crack) wanted more power, so Vince pushed the envelope for me. The car was awesome and had no problems.. Until the colder weather came. Then I started getting spark knock sometime in the cold mornings. Had to shutdown my 2nd pull on the dyno because of knock. Vince took out some timing but still got the occasional spark knock. Did not have any problems until I was showing off with my Brother-in-law in the car and decided to take it from 70 to 120 in 5th gear. Still no problem until I let off and noticed the engine light was on. Looked at the codes and I had low fuel rail and misfires in all cylinders. However no drivability issues except in low rpms when it would stutter really badly. Took it to GM where they found low compression in cylinder 1 which resulted in bad rings and cracked piston #1.

 

Did they fix it for free?? that would be sweet if they did not find your tune!!!

 

The very first "mod" I did on my car was buy a second ECU. As soon I got it, I put it in my car and put my original ecu in a safe place just in case. So when this happened, I put the original stock ecu back in the car, drove it around for a couple of days to put the codes in, then took it to the dealership.

 

Yah and also sleazy to except the free work seeing its his fault it broke. These stock motors are not meant to run 30psi. If it breaks the owner should cough up the cash to fix it.

 

Good for you man thats nice that everything worked out. I wanted to do that but I am scared they would find out or I would crash my car. So I bought the gms1 well wish I would of went that way.

 

I used to think that way,until I see how many dealers have not covered the brake issues that most of us have.I say if you can get the dealer to warranty it,then all the power to you.That almost makes up for the brake issues.

 

my brakes were covered under warranty

 

sideout,

how much timing was vince running above stock when it was knocking on the dyno?

vince has my a/f ratio at 12.0.

 

Hey glhs, you used to be on srt forums . com?

 

thats not right.. lol thats very strange that vince would leave it there based on coversations i've had with him

 

1 Injen Intake, Zex nitrous system, bottle heater, blow down tube, window switch (faulty), custom exhaust.
2 None, just a 75 shot of nitrous
3 9,000 maybe?
4 N/A
5 N/A

 

Not sure.. I did not really ask specifics about the tune. I guess I should have.

Since I don't know how to do multiple quotes.. I don't feel sleezy or bad at all since I have been screwed several times in the past so I am not even close to being even..

 

I was never on the srt forums, but was on turbododge.com back in the day whan I had my charger

then I came to the dark side, Chevy, lol

as far as a/f ratio, It took me almost 3 weeks of back and forth data logs(almost 15 emails)with vince to fine tune the car. I was between 11.8 and 12.0 tunes, but we left it at 12.0 with about 5 to 6 degrees of timing advance over stock on the tune that is currently in the car(per vince).


don't know about other cars or what he is doing now, as sideout's a/f ratio, per his post, was mid to high 12's when it was on the dyno and eventually let go, and stamina also stated he was low 13's to mid 12's also, so who knows?

 

I think he's only looking for LNF's........

 

glad you got on here. didnt even know you were on css.. good stuff.. another note is our club president works for gm so we get alotta stuff covered that most people wouldnt anyway

 

Don't go getting the guy in trouble . No good deed.......

 

true that but dealers work in a sleazy way also, hows this, my power steering went out and I had to replace the whole column for 2 g's, only had 800 miles on it still fresh, they were trying to get out of it until I threatened them legally, my issue turned out to be a recall by GM. Theyre dirtbags sometimes they would buy hit cars,not report them to carfax and fix them up and charge you up the ass. Nothing wrong with them getting a taste of their own medicine.

 

hey it gives dealers work. It puts food on their family's table when their father, the mechanic, gets that warranty work he still gets paid. GM loses out true, but if it were one of those mechanics friends, personal car, or family... he would be warranting it as well. i bet you half of these people that modded their cars would never take them in to get fixed unless its free. That means no work for mechanics and less money for them in the long run. ESPECIALLY GM mechanics.

 

peaking in.... interesting trend appearing here.

 

Tagged to be able to find easier and study trends.

Epic idea

 

Interesting list, I, as well as other would appreciate the off topicness be kept to a minimum. this is not an ethics thread, lets keep that out of here. I am interested to see the results, so please, let's just discuss the broken pistons.