[IMS-340C]

Thanks didn't know stock turbo could reach those levels of boost.

Originally Posted by G.Newt

I just looked at my old BM3 Stage 2+ E30 map datalog. It definitely hit 23-24 psi at times. I ran that for nearly a year with little issue.

[Skyhigh]

One of the top catastrophic events as a result of tuning. Not uncommon. Of course it happens even to untuned vehicles but that's very rare, for obvious reasons.
The worst way a turbo can fail.

[G.Newt]

Originally Posted by IMS-340C

Never heard of a turbo shattering and making it's way into the engine before.

Most of the time, it gets caught in the intake manifold. But there are some gaps in the intercooler where it can make it past and slip through to the engine. A 340i local to me had his VTT GC turbo blade break and end up in the manifold.

I actually just sold my stock intake manifold to someone who had his broken turbo bits end up in his manifold as well.

[IMS-340C]

I guess you mean the compressor blade, I am surprised BMW didn't put a kind of mesh between the charge pipe and throttle.

Originally Posted by G.Newt

Most of the time, it gets caught in the intake manifold. But there are some gaps in the intercooler where it can make it past and slip through to the engine. A 340i local to me had his VTT GC turbo blade break and end up in the manifold.

I actually just sold my stock intake manifold to someone who had his broken turbo bits end up in his manifold as well.

[Skyhigh]

And introduce another potential single failure catastrophic event?

[IMS-340C]

Why would a static metal mesh fail ? in that case the intercooler fins could also fail

Originally Posted by Skyhigh

And introduce another potential single failure catastrophic event?

[Skyhigh]

Rust? Fatigue?

In Engineering it is all about MTBF (Mean time between failure) and probabilities.
The probability of turbo failing and more importantly - failing in a way which is catastrophic for the engine, is extremely remote (under stock configuration, that is).
Therefore no need for additional protection (which would need its own MTBF assessed and eventually mitigated, plus added manufacturing cost).

All those numbers and assessments go down the toilet once we start modifying.

[IMS-340C]

I ran 21 psi on MPPSK tune.

Originally Posted by Skyhigh

Rust? Fatigue?

In Engineering it is all about MTBF (Mean time between failure) and probabilities.
The probability of turbo failing and more importantly - failing in a way which is catastrophic for the engine, is extremely remote (under stock configuration, that is).
Therefore no need for additional protection (which would need its own MTBF assessed and eventually mitigated, plus added manufacturing cost).

All those numbers and assessments go down the toilet once we start modifying.

[B58]

Originally Posted by Skyhigh

Didn't the MHD Stage 2 HPFP E40 target 21-22 Psi as well?
I found it scary when I saw the log…

My target is 20 psi but I only hit about 19 psi on the HPFP E40 so I'm not sure if there were any changes or not with v3.3 as that's the only one I have experienced. The WGDC is at 90% so the turbo is nearly maxed out.

[IMS-340C]

Yeah I've seen this in a couple of cars, stock turbo not able to hit high boost at peak RPM.

Originally Posted by B58

My target is 20 psi but I only hit about 19 psi on the HPFP E40 so I'm not sure if there were any changes or not with v3.3 as that's the only one I have experienced. The WGDC is at 90% so the turbo is nearly maxed out.

[E90ROXS]

I have been getting unstable STFT and some timing corrections. Car on flexfuel with DAW, DS2 hpfp and PI controlled by Reflex. Can you guys take a look to see if log has anything obvious? Thanks! btw I'm still tuning.

https://datazap.me/u/alanle/david-re...og=0&data=3-24

[IMS-340C]

Timing corrections are ok but timing advance is low for a flexfuel tune.

Also boost is low you should be targeting at least 25 psi boost and 15 degrees timing.

Originally Posted by E90ROXS

I have been getting unstable STFT and some timing corrections. Car on flexfuel with DAW, DS2 hpfp and PI controlled by Reflex. Can you guys take a look to see if log has anything obvious? Thanks! btw I'm still tuning.

https://datazap.me/u/alanle/david-re...og=0&data=3-24

[B58]

Originally Posted by E90ROXS

I have been getting unstable STFT and some timing corrections. Car on flexfuel with DAW, DS2 hpfp and PI controlled by Reflex. Can you guys take a look to see if log has anything obvious? Thanks! btw I'm still tuning.

https://datazap.me/u/alanle/david-re...&data=3-24

You're pretty lean on the spool up and such unless they're doing that for better spool. I can see your STFT increasing so maybe the reflex file just needs a bit of added fuel, but you did mention you're not done tuning yet so just wait and see the outcome with the next revision.

[E90ROXS]

Originally Posted by B58

You're pretty lean on the spool up and such unless they're doing that for better spool. I can see your STFT increasing so maybe the reflex file just needs a bit of added fuel, but you did mention you're not done tuning yet so just wait and see the outcome with the next revision.

Thanks! we have been tuning for a while. Long story short, my car had a bad coil and we couldn't find out what went wrong so I guess the tuner tuned the car around the problem. I changed out the coils, plugs and injectors. Now we are tuning for flexfuel from 91 octane to E85. I noticed the boost spiked up and down between 15 -17 psi when the car was on auto mode. Sent tuner the log but I want to see what's your input is.

https://datazap.me/u/alanle/david-re...og=0&data=3-24

[dinan5m3]

On the subject of "fuel", been looking at this from searching online, wanted to ask the experts here...

Not ideal to do WOT data logging with fuel (in my case, pump gas of Shell 93 octane blend with E10) in the tank that's been ~1 month since last top off, i.e. 1 month old fuel?

Too stale to do a proper WOT data logging with?

I read that the fuel has "stuffs" mixed in to avoid fuel from going stale?

[IMS-340C]

Looks like bad throttle mapping, gas pedal 50% while throttle 98%

Originally Posted by E90ROXS

Thanks! we have been tuning for a while. Long story short, my car had a bad coil and we couldn't find out what went wrong so I guess the tuner tuned the car around the problem. I changed out the coils, plugs and injectors. Now we are tuning for flexfuel from 91 octane to E85. I noticed the boost spiked up and down between 15 -17 psi when the car was on auto mode. Sent tuner the log but I want to see what's your input is.

https://datazap.me/u/alanle/david-re...og=0&data=3-24

[E90ROXS]

Originally Posted by IMS-340C

Looks like bad throttle mapping, gas pedal 50% while throttle 98%

Also do you think it could be bad wastegate? I did a smoke leak test and did not see any leak. Engine compression numbers were also good.

I reset adaptation but problem still persists
https://datazap.me/u/alanle/reflex-v...data=2-3-24-27

[IMS-340C]

You could try an OTS map and check if the problem disappear.

Originally Posted by E90ROXS

Also do you think it could be bad wastegate? I did a smoke leak test and did not see any leak. Engine compression numbers were also good.

I reset adaptation but problem still persists
https://datazap.me/u/alanle/reflex-v...data=2-3-24-27

[G.Newt]

Originally Posted by IMS-340C

Looks like bad throttle mapping, gas pedal 50% while throttle 98%

That's normal, at least from my half-throttle BM3 logs. They show throttle angle at 95-99 with 40-50% throttle. Do you have a half-throttle log where throttle angle matches?

https://www.bootmod3.net/log?id=61ba...90c665b9ebcb45

[E90ROXS]

Originally Posted by IMS-340C

You could try an OTS map and check if the problem disappear.

Yeah I was thinking of this. Will have to buy the maps.

[G.Newt]

Originally Posted by E90ROXS

Also do you think it could be bad wastegate? I did a smoke leak test and did not see any leak. Engine compression numbers were also good.

I reset adaptation but problem still persists
https://datazap.me/u/alanle/reflex-v...data=2-3-24-27

The log sure looks like a boost leak. You never hit target boost and your WGDC is 90-99% at only 15 psi. Your load actual is a decent amount less than target load as well.
Your WGDC also oscillates up and down, almost mimicking throttle closure. Something isn't right.

Your smoke test came up with nothing? Hmmm

[E90ROXS]

Originally Posted by G.Newt

The log sure looks like a boost leak. You never hit target boost and your WGDC is 90-99% at only 15 psi. Your load actual is a decent amount less than target load as well.
Your WGDC also oscillates up and down, almost mimicking throttle closure. Something isn't right.

Your smoke test came up with nothing? Hmmm

I did a smoke test on the intake pipe down to the turbo and charge pipe. I also plugged it directly to the intake manifold. I didn’t see anything. The regulator on the smoke test regulates at 1 psi. Maybe I need to bring the car to a shop for them to test it with a higher psi tester. By the way I recently changed new o2 sensors, plugs, coils and injectors. So those are out of the question.