Piston failure

Forum for general discussions on engine tuning, not specific to a particular motec ECU

Piston failure

Postby Mazi on Thu Jul 08, 2010 10:02 pm

VAG BAM engine (Audi S3 1.8 turbo), GT3076R, M800

435HP-490Nm and hole in the piston...
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Piston failure 1.jpg
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Re: Piston failure

Postby Martin on Fri Jul 09, 2010 4:22 am

I like the boost!

wheres the Ign timing? :)
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Re: Piston failure

Postby Mazi on Fri Jul 16, 2010 6:35 pm

It was 3-4deg during "high boost".

Boost is flat and nice :) Sensor is Bosch 400kPa with integrated AT sensor. Wastegate control valve is E75 stock VW and is working perfect. There was no pain to set up PID and tube network this time.
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Re: Piston failure

Postby Martin on Sat Jul 17, 2010 12:52 am

What wastegate are you using?

As far as I know you get the 3076 in both internal and external?
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Re: Piston failure

Postby Mazi on Sat Jul 17, 2010 6:36 am

Internal one.
Actuator is 52mm diameter from the stock setup with modified mounts. There is no place behind the engine to fit bigger one.
Attachments
S3.jpg
S3.jpg (457.91 KiB) Viewed 22905 times
Audi S3 Turbo.jpg
Audi S3 Turbo.jpg (324.64 KiB) Viewed 22913 times
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Re: Piston failure

Postby Martin on Mon Jul 19, 2010 3:33 pm

very nice
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Re: Piston failure

Postby fel1979 on Tue Jul 20, 2010 12:00 am

Is it possible to share more data?

Like Ign advance, Duty Cycle, knock?
What fuel were you running and Specs.

Why do you have that flutuation with the lambda, if your boost was stable?

Are you running hi/lo injectors?

If you could add the log file it will help to understand the whole picture.

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Re: Piston failure

Postby Mazi on Thu Jul 29, 2010 6:51 pm

It wuz bloody 1000ccm injector... :evil:
Attachments
BAM S3 Hole.jpg
Hole where the middle inlet valve take place
BAM S3 Hole.jpg (457.31 KiB) Viewed 22733 times
BAM S3 Head.jpg
No damage!
BAM S3 Head.jpg (416.44 KiB) Viewed 22737 times
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