Anyone blown a stock boosted motor yet?

[Astroboy]

Originally Posted by protpibe

@King Tut

Add me to the list...

AVO Turbo Kit - full 3" catless exhaust
-Ecu Controlled boost 10-15psi
-Overboosted to 22psi in 5th gear on the highway and developed a knock (all vacuum lines intact)
-23,000km with no issues up until this

Sucks to hear about this... I really admired how your car was doing... I hop I don't encounter any issues like this with my car

[killerkid08]

wasn't going to read through 19 pages to see, if i made the cut for blown engines.

I can account for two FA20s going to pieces. One at 14psi and the other one at 10psi. Both condensed their rods into nothingness, broke them, and hammered their way out the block.

Based on my observation, these engines are not designed for the boost, period. Not lets run less boost, your tune was garbage, you got bad gas, your girlfriend was in the car, etc. They aren't designed for it. If you want to do it right, build it. Forged this and forged that.

Or you can weigh the options, you pop your engine, it catches fire, and your fr-s / brz burns to the ground. Even if it doesn't, you're out of $3000. Buy a new engine instead, and that's $5000 or more.

Take it from me, GO BUILT, then GO BLOWN !

[Reaper]

This engine was actually designed for boost. The pistons were not. The rods are plenty strong.

[killerkid08]

You sir are so wrong its funny. 2 engines, several condensed rods. Twisted, broken in half, rattling in my oil pan, and coming up through my block. I can speak from my experiences that the rods failed twice in a row.

[Billion]

Who did your tune?

[ATL BRZ]

Originally Posted by Reaper

This engine was actually designed for boost. The pistons were not. The rods are plenty strong.

Originally Posted by killerkid08

You sir are so wrong its funny. 2 engines, several condensed rods. Twisted, broken in half, rattling in my oil pan, and coming up through my block. I can speak from my experiences that the rods failed twice in a row.

@Reaper is actually right as he has accumulated tens of thousands of miles on high boost+E85 with stock internals. You have bad luck or a bad tuner, or both.

Originally Posted by Billion

Who did your tune?

I have a feeling the answer to this will be very revealing.

[King Tut]

Originally Posted by killerkid08

Not lets run less boost, your tune was garbage, you got bad gas, your girlfriend was in the car, etc. They aren't designed for it. If you want to do it right, build it. Forged this and forged that.

Who tuned the car and do you intend to let them blow your forged motor as well?

[Jesse36m3]

Originally Posted by killerkid08

You sir are so wrong its funny. 2 engines, several condensed rods. Twisted, broken in half, rattling in my oil pan, and coming up through my block. I can speak from my experiences that the rods failed twice in a row.

I suspect a garbage tune, and your girlfriend was probably in the car.

[Phantobe]

Your tune blows...




























engines.

BOOM!

[Reaper]

Rods are plenty strong it's the pistons that break. I've seen astronomical hp made on stock rods with good pistons.

[Illuminaughty]

Originally Posted by Reaper

Rods are plenty strong it's the pistons that break. I've seen astronomical hp made on stock rods with good pistons.

So is it usually a melted piston that takes the rod with it? I've seen some builders swap out rods and not pistons, claiming that the stock pistons are just fine. When I decide to bump the power up and get forged internals I planned on dropping new pistons in either way, since I'll already have the bottom end apart and pistons really aren't that expensive in the grand scheme of things.

[Reaper]

Stock pistons are very very thin at the wrist pin and not fully boxxed. An over rev alone can pull the wrist pin out of the bottom of them. Stock rods are strong.

[killerkid08]

My tunes were provided by FA20Club and Visconti. (Whether one of these tuners or both is garbage is possible)

I don't think the pistons were the issue on my failures, though i can report, i have looked through my initial engine's teardown photos to find one piston had melted down. The second engine though had sound pistons, and wavy and snapped rods. I've got chunks of block that i keep in a baggy on my desk as a reminder. Gotta beat myself up sometimes.

1 for the rods ----- 1 for the pistons

For the guy who said my GF was in the car, my wife actually was during one of the runs. The hilarity that ensued after a dinner and night out, followed by a highway pull between exits, and ended with the thorn in her side exploding was glorious for one of us.

Not trying to start a war here, just delivering my two cents based on two junk engines. I'm technically on my fourth FA20 now, between 2 FR-S's.

[Kuros]

Full Blown kit with garrett 57 trim.
Full 3" exhaust
MAP Oiler Cooler
Full Blown Large Aluminium Radiator
AZ/CA/NV 91 oct
100% stock long block
399whp/329wtq @ 11.5psi 3rd gear 4500ft elevation, 85 degree ambient air temp


Motor is doing great! at 6k miles, 5k have been boosted.
Tuned by Mayhem Tuning