I understand what you did Quik, but you also ran your engine at 150 temps and knew at any given point it could be your last pull. I live in south carolina, it's 90+ degree's here 9 months a year. Also factor in the fact your numbers where on a low mileage engine, my 80k+ engine is in a different field in my opinion.

I also believe there is a reason performance engines don't run cast pistons with stock GM oil and compression rings. These OEM pistons where designed for mileage, not extreme repeated pressure and high cylinder temperatures. Short term sure, but it's comes down to these are mechanical parts, they will wear out.

 

Your most likey gonna need to bore it. Personally I usually find when you get one of these apart with high milage there is usually a little tapper or out of roundness that needs to be corrected. And thats on a stock daily driver. nothing with bost or spray. By the time you hone it, It usually ends up on the sloppy side. Just get some Forged slugs and either run the 05 up style rod for the 4.8L with Good bolts or get some forged ones...

 

the LSA motor is no different then any other GM production motor and its boosted from factory to give you an idea

i never once thought the motor would blow on each pull. the build was carefully thought out!!!!!!!!!!!!!!!!!!! Im not the only one to follow these guilde lines and make a motor last. Going outside the guideline will lead to issues as others have shown.

mileage isnt as a factor compared to how abuse is more of a concern. Id boost the **** out of a well taken care of 200k motor

 

quik, about your engine temps. i had kept thinking you were a southern guy but see your from pa. you get hit with the same kind of weather as me. hows your truck in the cold months with running such low engine temps. do you actually have heat in the cab? how much do you feel the cooler temps attribute to your long lasting motor.

 

i only drove mine a few days in the cold as its not a daily. Truck had heat but nothing great.

our motors have a horrible coolant circulation problem which creates hot spots in the cylinders/heads. keeping the motor as cool as possible helps keep the hot spots in the cylinders/heads cooler and not so prone to melting a piston

for a true Daily i wouldnt even consider anything ive done to that last build. For a toy you take every precaution and guideline, use them so things last

 

Thanks for the information 1FastBrick. I plan with that in mind now.

Quik after one google search, this statement is not correct. Please post accurate information. If otherwise, please state your source.

Detriot Auto:

LSA engine has a forged crank, Vortec engines do not.

Also read: The piston skirts are polymer coated for improved scuff resistance and reduced NVH. The sumped top design of the pistons is retained, which allows for clearing the valves without machined valve pockets. The continuous surface free of edges helps to avoid hot spots that can contribute to pre-ignition.

The LSA gets the same beefed up block casting, seven-layer head gasket and 12mm head bolts as its big brother (LS9). The improved lubrication system including the squirters that spray oil on the bottom of the pistons is also retained. In total, the LSA and LS9 have about 100 new part compared to the LS7 in the current Corvette Z06. Of those, about twenty-five percent are common to both engines.

Sounds like a stretch to say this is the same engine as my 4.8L.

Also worth nothing, GM warranty on short blocks is 24 months or 24,000. After that, it's on you.
http://paceperformance.com/paceperfo...March%2007.pdf

 

the pistons are still hyper which arent forged as which my point was, the crank is never the problem in the LS motors.

you brought up point of forged pistons which lead to the previous statement

 

But the lsa/9 have oil squirters which are a very big factor in piston longevity with boost and cast pistons. Just like in diesels. Not exactly an apples to apples comparison.