Blown Engine
 

What do you guys think about a 350whp Turbo Build that blow a rod, have this happen to anyone else?

The FR-S enguine block was broken at top and the rod came outthe enguine. The driver states that he was not at redline and under normal acceleration.

Let me add this turbo kit have a meth tune, I dont know how was that posible at 350whp? Any light?

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Detonation

If you melt a piston, anything can happen from repairable damage to full blown nonlinear catastrophic structural exasperation.
Who did the tune?

You can pop a motor at any hp level or rpm. Sure it's more likely to happen at higher stress levels but that's not the only possibility.

unmodified NA engines have thrown rods too, no big deal.

Just because he threw a rod means nothing. He was using 91/93 with meth. Improper tune, abuse, idk but there are other factors besides he was boosted and the block can't handle boost. Gotta pay to play.

Here in Puerto Rico we have a shop that bought an FRS and build Turbo Kits... the turbo kits are very good quality.

Fiebruzmotorsport

Now tuning I dont know men I have questions... I have 358whp on dynojet. 93oct Meth no fuel upgrades like pump or injectors.

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Is weird men, I just dont want to raise boost anymore I am scared jajajaja

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358whp and stock fueling?? What AFR?

Run between 10 on full boost to 14 something on normal use

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wow 10 is pretty damn rich under WOT pull.

Weird, I would have thought the stock fueling would have ran out well before you were able to squeeze 350+ WHP out of it. I guess the meth helps out a lot.

Rpm and thrortlemhave ZERO to do with moment of the breakdown. The damage is typically done over time or during a previous event when breakdowns occur under normal driving. I blew a large hole in #4 on my wrx in a parking lot going 20mph. Obviously thebdamagebhad already been done and it just happened to give out at that time.

It seems many people on this forum have yet to realize a naturally aspirated motor with 150lbs torque is not and does need to be overbuilt, there us zero reason to believe that this engine should stand up to ant reasonable increase in power. In fact tear downs of this engine by professionals have clearly revealed the design decisions clearly favored light weight engine components for high rpm and not strength.

No, this motor does not have forged rods. Yes, this motor was built for high-er stroke speeds. You happen to be missing a few keys points as to other variables that engine internals see outside of just the torque produced by the combustion process, as well was the overwhelming empirical evidence of literally thousands that are boosted on stock internals.

Applying conventional thinking, yes this motor doesn't like boost. Understanding the many benefits of DI, you will start to see why we can make power reliably with boost. The cooling effect on in-cylinder temperatures that DI provides keeps both the piston head cool, and helps prevent detonation. This is especially important at the 12.5:1 CR that we have. Another thing people would say is a disaster for boost. Quite the opposite. Having that high CR allows us to spool much larger turbines with our measly 2.0L, and make some decent torque with much lower PSI. There are many more variables to factor in. The only difference between our block and the FA20DIT factory turbo motor from subaru is different pistons. They opted for a lower CR to be safe.

As for the OP, I very rarely blame a kit for engine failure unless the install was suspect. The real question is, why are you running stock fueling at 350whp? Tuning, especially with adding in the Meth variable, would be my first guess for the root cause of failure. Sure rods just give out sometimes. But tuning is absolutely key to boost reliability. Without having logs, there's no way to know though.