Forced Induction motors that have died

jax4557

What was the WHP: NO DYNO
What wtrq: NO DYNO
How long did it run before it died: 4 Months
Was it ever 100% running right before it died: It seemed strong and fine with slight gremlins
What kit: BP v2 PT 6766
What PSI: 14 PSI
What was the cause if you know: Cyl 1 ringlands broke and dropped rings
What year was the car: 2014 370Z Sport
Tuner: SEb at Specialtyz
Software: Ecutek
Fuel: Flex ( E81 at time of failure )

The tune was complete and I was happy, I did notice that I would have issues starting after driving somewhere and it sitting for 30 minutes or so.. (hydrolock)? I also thought I was smelling E85 in the oil but I could not confirm this. I was doing a roll in Mexico against a gtr and although I won I noticed slight smoke. I pulled off to a gas station and could not find any smoke so I drove home and the next morning I started it and it was smoking profusely. A teardown revealed cyl 1 ringland and rings dropped but no denotation that was obvious on the piston.

shadow85

So to Jax4557 and ANMVQ, would the engine have been saved and not have blown up if you guys had forged pistons and rods?

Curious to know because I soon will be trying for around 500whp with a SC kit, and I may have a little bit of a budget left to add forged pistons and rods.

But I had normally left them out because I was told by several people including a FI rep that it isnt required for me as I am not going over 600whp.

But reading these peoples stories of blown motors is starting to worry me a lil.

jwick

Unless you are going A2A, then no they won't help. The problem with the Stillen kit is the ECU has no clue what IATs are so it doesn't know how to compensate. Having forged pistons won't help a bad design.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

EliteXpress

Please don't take this in the wrong way. You're ringland resulted in my opinion to no proper dyno tuning & pushing such high PSI.

Un-top you were pushing a bigger than normal turbo to this kit, with out the proper fuel needed to the engines needs.

I have studied your YouTube videos, one can clearly see you sometimes running lean up top. Again in my opinion, but if you had the proper boost cut via ecutek you would have figured to upgrade to more fuel needed to run properly at that boost level.

Remember these engines were not built to with stand these power levels. The key ingredients is necessary for them to last.

Sorry to hear of you're lost. I too am pushing mine's & have saved in case I experienced the same results.

At the end of the day we all love to push the limits.

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Boosted Performance Kit Built By JMS Racing 700whp. IG: @EliteXpress370z

jax4557

I appreciate the input and I dont know what happened and you could be spot on but I will point a few things out you are wrong on so it can help use all possibly come to a better conclusion on these failures across the board.

I am running ecutek and do have AFR protection and overboost injector cut enabled and configured by seb ( one of the best in the business ).

I also have knock warning turned on and saw it a few times when getting into the throttle in 4 gear a little to soon in the rpm range ( Learning the car )

I am running a Aeromotive 340 pump with 1150cc injectors and a cjm se-1e fuel return system incorporating a flew fuel setup so I believe my fuel is fine.

Lastly the AFR you are seeing are with E85 and are going to be different than you typical 93 octane tune as well as I had a leak in the initial stages and my wideband was off a bit during off throttle after a pull

I am pinning my failure up to a casting defect or existing issue with the cylinder 1 ringland area and of course pushing the limits to 14 PSI for 4 months probably didn't help it. I have seen a few people pushing the BP kit to this level with no issue so I think it was a one off issue in my case. My replacement motor also is seeing closer STFT numbers on bank to bank so I think that tells me the rings were already leaking oil into the cylinder day one of tuning.

solidus

What was the WHP? 443 (mustang)
What wtrq? 373
How long did it run before it died? 2months (1 day after tune )
Was it ever 100% running right before it died? No
What kit? BP 6266 1.5ar ,
What PSI? 7.5
What was the cause if you know? Overboost due to vacuum leak. 23.7psi
What year was the car? 2015



I had installed the BP kit and it took awhile to work out heat related gremlins such as melted trans harness and melted filter. I "thought" it was over. Took it to dyno after everything was buttoned up hoping to tune for 12psi. It kept spiking at 16.5 on the dyno so the tuner turned off the ebc assuming I had a BC solenoid problem. finished the tune at wastegate using the 7.5 springs and yielded the above listed numbers. I was "Ok" with it since I knew I needed to work out some issues. The very next day I take it for a spin and it felt "Very good" better than it had since driving it only on the base map. On my way home I had an opportunity in the form of a wide open road. I WOT'd it and it felt beyond good all the way through 4th gear. At the top of fourth it felt like a 200 shot nitrous hit for about 3 second. Then there was silence and wind noise. No exhaust, no thumping or clanking, just silence and wind. Took me a bit to absorb it but I located a 7.5kmile engine from another 15' Nismo and started over. When the install was done, the oil pan from the old engine was filled with shattered metal. Looked like a silver prospector borrowed it. After nursing the car from the shop to my house I noted I was still getting spikes of 13-14psi on wastegate without EBC plumbing. Pulled all the vacuum to replace it and found a hole burned in the line to the passenger side wastegate. After replacement boost was stable with zero spikes over wastegate pressure. Put EBC plumbing back and all thats left is to fine tune the EBC.

Kris9884

Dang. Its a shame all that time and money spent replacing the motor was due to a simple leaky hose. I bet it felt great for those few seconds though

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ANMVQ

To answer both question I think air temp had something to do with it, but the tune and the way"YES" Rob the tuner went about things probably had more to do with it. I was'nt making an WOT pull went my car starting knocking, I was getting of the hw " off ramp" to pick my with up at school. In the three days a drove it maybe made 3 WOT pulls :/. I didn't beat on the car.


You had you car tuned in MA Jay?

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

JWillis72

He tuned my car in Florida, he's good friends with the shop owner here. I'm not saying he was responsible for my blown motor, that was a cracked radiator and being stuck in crazy traffic but he never had my car where I felt it was right. Seb had my car running better within the first couple flashes.


Sent from my iPhone using Tapatalk

ANMVQ

I'm sure he was, . Sorry man, Like I said wish I knew about Seb 3+ years ago when all my crap happened

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

TopgunZ

Don't you think it could have been intake temp related? 13psi and not knowing temps....?

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jchammond

Did we hear of maybe 3 blown boosted engine's? That's pretty few for 1.5years of thread....

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Optimiser

Until it happens to you!

EliteXpress

Just like anything, when building a house you want to add the supporting mods to the structure to ensure longevity.

Fuel management is the same for our platforms when running BOOST. On my build, I sometimes experienced fuel starvation while running the Aeromotive 340 pump even at only 10 PSI running a mixed e85 blend. One advantage of having a fuel content analyzer, I would cut the blend to e68-e70 to keep things happy until we upgraded to the new CJM Top Hat along with a Walbro 450. Now she sits nice and rich under wide open throttle even while utilizing pure e85 up top to red line.

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Boosted Performance Kit Built By JMS Racing 700whp. IG: @EliteXpress370z

jwick

Best advice for a turbo build, go nuts on heat management

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build