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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 > Quick Procede "Which map" Question?



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      07-09-2013, 06:45 PM   #1
TheAcAvenger
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Quick Procede "Which map" Question?

My new town/job around tree hugging biologists/environmental scientists means that I just put catted midpipes back on. (Emissions testing, awful glares, these people are weird.)

So I have RBs, Catless DPs, IC, yada yada yada insert your FBO mod here... EXCEPT I HAVE CATTED MIDPIPES, am I seriously going to need to run Stage 1 maps?

If I go buy some HFC midpipes, will that allow me to go back to Stage 4?



yeah yeah yeah, i know I disappeared from here for a year and was planning on selling this thing, but every time I was about to part it out, I couldn't do it. Hope everyone around here is still doing well. Happy to notice some old timers are still active
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      07-10-2013, 03:21 AM   #2
Lunatic Fringe
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You want to run the upgraded turbo map. Catted midpipes aren't going to effect which stage you run. They are downstream and have minimal effect on turbo efficiency.
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      07-10-2013, 03:23 AM   #3
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Quote:
Originally Posted by Lunatic Fringe View Post
You want to run the upgraded turbo map. Catted midpipes aren't going to effect which stage you run. They are downstream and have minimal effect on turbo efficiency.
I agree.
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      07-10-2013, 08:21 AM   #4
TheAcAvenger
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Quote:
Originally Posted by shiv@vishnu View Post
I agree.
thanks fellas!
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