About 10 years ago, I spun a rod bearing and put a hole through the block. I found a replacement engine on craigslist near me that had just been rebuilt with the intention of going turbo. Some kid owned it and totaled the car before anything else was done to the car. Anyway, he was parting out the the car and his dad forced him to sell everything dirt cheap to get it out of his yard and I got a steal on the engine and a few other odds and ends. He showed me a receipt at the time to prove that at least something was done to the car, but he had no idea what was actually put in it.

Now that I've finally got the turbo kit installed, I really need to know what's in this thing so I know how far I can safely boost it. For now, I'm not planning on going beyond 7 psi until I can determine this.

I look a look at the bottom of the pistons after I dropped the oil pan and the only marking I can see is "0124". I did a compression test years ago and it was inline with what you'd see with 8.6/8.8 compression so I've just assumed that was what was put in. Any know from that marking what pistons these could be?

Anyone know anyone who can help me tune this in the Pittsburgh area (Greensburg)?

Pictures?

And why 7 psi? You should limit yourself to a HP level rather than just a pressure level. PSI does not mean much.

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2012 2500HD LML

Anyone know anyone who can help me tune this in the Pittsburgh area (Greensburg)?

Can anyone else shed any light on this? I already put the oil pan back on and forgot to try to get pics. Anyone have any pictures of forged pistons with the markings visible? I tried searching for some and didn't find much.

Anyone know anyone who can help me tune this in the Pittsburgh area (Greensburg)?