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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Retune after secondaries deleted?



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      07-11-2015, 01:14 PM   #1
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Retune after secondaries deleted?

Is it needed, does it change anything?
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      07-14-2015, 08:47 AM   #2
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Quote:
Originally Posted by TheAxiom View Post
Is it needed, does it change anything?
Maybe just reset engine adaptives to compensate/learn for any decrease in back pressure that resulted from the delete.
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      07-14-2015, 09:16 AM   #3
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Likely a negligible difference.
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      07-14-2015, 09:33 AM   #4
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Quote:
Originally Posted by TheAxiom View Post
Is it needed, does it change anything?
Should not require anything.

What tune are you running?

Mike'
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      07-14-2015, 09:43 AM   #5
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
Should not require anything.

What tune are you running?

Mike'
I'm NA. I'm looking for the effects on all platforms, turbo and N/A.
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      07-14-2015, 09:43 AM   #6
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What? No.

You've removed a marginal impediment to exhaust velocity; the DME will figure it out just fine (to the extent it changes anything).
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