2011 STI blown pistons 13k stock tune !

[aamir1632]

Hey guys, im not too sure what to expect with my car anymore. I have a 2012 sti with a little over 13k miles. Never beat on the car, but drove it aggressively at points, before bringing the car into the dealer i was running COBB stage 2, and a tbe. I have a cracked 4th ringland and subaru is giving me a "good-will" one time repair. Not a new short block, just a repair. I was thinking about replacing the current pistons with forged ones since they already have the motor broken down, and will void the warranty on the pistons after this repair anyway. Does anyone have any suggestions one whether i should replace the pistons with forged ones or just leave the oem spec ones on there?

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[WRXLTD]

Originally Posted by aamir1632

Hey guys, im not too sure what to expect with my car anymore. I have a 2012 sti with a little over 13k miles. Never beat on the car, but drove it aggressively at points, before bringing the car into the dealer i was running COBB stage 2, and a tbe. I have a cracked 4th ringland and subaru is giving me a "good-will" one time repair. Not a new short block, just a repair. I was thinking about replacing the current pistons with forged ones since they already have the motor broken down, and will void the warranty on the pistons after this repair anyway. Does anyone have any suggestions one whether i should replace the pistons with forged ones or just leave the oem spec ones on there?

IMO, if you plan on selling the car in a year or two, go with the free repair and stock piston replacement.

If you plan on keeping the car for longer...and maybe even tracking it...go with the forged pistons.

[2011boostdwrx]

I dont know guys Im on my second motor 2011 WRX 15K miles. Yes I modded (heavily), yes I am at 350WHP etc. But damn these engines are not doing well even in stock form! I was just on the Dyno yesterday and had a problem, waiting to see what it is!

[PROcede]

Originally Posted by 2011boostdwrx

I dont know guys Im on my second motor 2011 WRX 15K miles. Yes I modded (heavily), yes I am at 350WHP etc. But damn these engines are not doing well even in stock form! I was just on the Dyno yesterday and had a problem, waiting to see what it is!

Second motor? Both replaced from Subaru or you purchased a built block? What kinda driving do you do? Hard launches? Shifting at 7k? What mods do you have? What kind of dyno were you dynoed on? How often do you change your oil?

[GrumpyPitbull]

Originally Posted by 2011boostdwrx

I dont know guys Im on my second motor 2011 WRX 15K miles. Yes I modded (heavily), yes I am at 350WHP etc. But damn these engines are not doing well even in stock form! I was just on the Dyno yesterday and had a problem, waiting to see what it is!

350 hp should not be blowing motors left and right, if it is tuned correctly.

I know you guys who blow multiple motors don't like to hear it, but the problem is likely on your end .. not the car. The real issue is either your tune (most likely), you beating the crap outta the car, bad gas, lack of maintenance, cheap ebay parts, or any combination of those issues.

[VisBits]

Originally Posted by GrumpyPitbull

350 hp should not be blowing motors left and right, if it is tuned correctly.

I know you guys who blow multiple motors don't like to hear it, but the problem is likely on your end .. not the car. The real issue is either your tune (most likely), you beating the crap outta the car, bad gas, lack of maintenance, cheap ebay parts, or any combination of those issues.

I blew up 3 stocks motors on a stock tune and a cobb stage2 tune within 10,000 miles. Running a fully built engine now with absolutely 0 problems and a aggressive tune on the stock turbo.

Subaru pistons just suck, every single failure was ring lands.

[BraveSTi]

Sure its been said 800 times in this thread(just like 8000 times on this damn forum)............................................ FACTORY-TUNE-SUCKS. GOOD TUNERS ROCK.

[Clark Turner]

Get the cosworth piston set and install it. Then enjoy your car for years to come.

C

[Ferris1977]

I just got my car back after a month in the shop!

it cost Subaru japan/Canada 23 000$ to fix it. I don't beat my car... I like the acceleration but I won't take it to the extreme...

they had to chage the following:

- 2 pistons with all gaskets, rings and seals..... yes 2 ringlands...
- tranny, came straight from Japan
- intercooler
- head gaskets
- turbo
- clutch
- flywheel

They told me I got a lemon so they changed the entire powertrain... Sucks for a 45-46K Car....

I don't enjoy it anymore... You look at it and it breaks!