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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 > Procede Stages and Boost Targets



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      11-22-2012, 10:53 PM   #1
Eric335
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Procede Stages and Boost Targets

Hey E9XPost,
As the title says, im trying to find out what mods you need for each stage, and what the max boost is per stage. I have been doing some research, and think i may have been using too high of a stage map on my car... Ive been using stage 1 with no mods (downpipes are shipping), with a 16-17 PSI max. Ill be using the 9-10 Aggressive maps for this chart.

Stage / Mods / Boost Target

Stage 0:

Stage 1:

Stage 2:

Stage 3:



Help me fill it in for future references!
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      11-23-2012, 07:32 AM   #2
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It says in the readme.
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      11-23-2012, 09:20 AM   #3
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16-17psi is way too high for tune only.

14-15 max.
15-16 with cones
16-17 with IC
17-18 with DPs

This is assuming no e85 and 93 octane
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      11-23-2012, 10:18 AM   #4
TT3 iN NyC
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I'm FBO, no meth.. running 93 octane.

i only see 14 max at WOT. =\

any idea?
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      11-23-2012, 10:37 AM   #5
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Quote:
Originally Posted by TT3 iN NyC View Post
I'm FBO, no meth.. running 93 octane.

i only see 14 max at WOT. =\

any idea?
Could be a bunch of things.

1.) Weak wastegates
2.) Boost solenoid
3.) vac lines
4.) Vac canister
5.) Boostleak at IC/Chargepipe
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      11-23-2012, 10:42 AM   #6
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Quote:
Originally Posted by pits200 View Post
Could be a bunch of things.

1.) Weak wastegates
2.) Boost solenoid
3.) vac lines
4.) Vac canister
5.) Boostleak at IC/Chargepipe
Thanks. I'll do a log tonight. Something definitely doesn't feel right about it though.
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      11-23-2012, 10:57 AM   #7
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It all depends on where in the RPM range you are seeing that boost. Hitting 16 psi down low then quickly tapering to 12-13 towards redline (as I believe the stage 1 maps do) should not be an issue typically. When you say you are hitting 16-17, I am imagining it is peaking at that and not sustaining it through the entire RPM band correct? If you can do a log and post it, it will tell us everything we need to know. I doubt there is anything to be concerned about though.
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      11-23-2012, 02:53 PM   #8
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Here are the Stage 0 Boost Curves for Various "Start Boost %":
http://www.e90post.com/forums/showthread.php?t=751726
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      11-23-2012, 03:14 PM   #9
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Quote:
Originally Posted by usc335 View Post
Here are the Stage 0 Boost Curves for Various "Start Boost %":
http://www.e90post.com/forums/showthread.php?t=751726
Thanks! I loaded up Stage 0 today and the car is running much better
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