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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 > .



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      09-02-2012, 11:19 PM   #1
Dmacc
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Last edited by Dmacc; 09-02-2012 at 11:50 PM.. Reason: delete this thread
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      09-02-2012, 11:36 PM   #2
GeorgiaTech335coupe
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Why do you think you aren't hitting your requested boost?
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      09-02-2012, 11:39 PM   #3
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Originally Posted by GeorgiaTech335coupe View Post
Why do you think you aren't hitting your requested boost?
It is probably me not fully understanding the software, and I sound like a total nub asking, but is overboost the requested psi you're trying to achieve?
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      09-02-2012, 11:39 PM   #4
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Change your start boost perhaps?
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      09-02-2012, 11:48 PM   #5
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Woops, disregard this thread, I found the sticky of the user manual, I'm an r-tard for not seeing it earlier, thanks for the help guys.
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      09-02-2012, 11:52 PM   #6
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Quote:
Originally Posted by Dmacc View Post
It is probably me not fully understanding the software, and I sound like a total nub asking, but is overboost the requested psi you're trying to achieve?
Overboost is the boost safety setting. If you boost over that value for a certain period of time (can't remember off the top of my head), it will force a Procede induced limp mode.

Start boost % is what controls your boost. Yours is at 30%. The way this value is determined is from 2 preset boost curves. The first is the 0% boost curve, the second is the 100% boost curve. If you put your start values at either of these 2 values, you will follow those curves. Any percent in between will add that percent of the difference between the 2 curves and add it to the 0% curve. For instance, if at x rpm 0% boost curve hits 15 psi, while the 100% boost curve hits 18 psi, if your setting is at 30%, then you will hit 15.9 psi (18-15=3*30%=0.9+15psi=15.9psi).

Those boost curves can be seen when you have the Procede reader open and are different depending on what stage map you run.
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      09-03-2012, 01:05 AM   #7
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Quote:
Originally Posted by GeorgiaTech335coupe
Quote:
Originally Posted by Dmacc View Post
It is probably me not fully understanding the software, and I sound like a total nub asking, but is overboost the requested psi you're trying to achieve?
Overboost is the boost safety setting. If you boost over that value for a certain period of time (can't remember off the top of my head), it will force a Procede induced limp mode.

Start boost % is what controls your boost. Yours is at 30%. The way this value is determined is from 2 preset boost curves. The first is the 0% boost curve, the second is the 100% boost curve. If you put your start values at either of these 2 values, you will follow those curves. Any percent in between will add that percent of the difference between the 2 curves and add it to the 0% curve. For instance, if at x rpm 0% boost curve hits 15 psi, while the 100% boost curve hits 18 psi, if your setting is at 30%, then you will hit 15.9 psi (18-15=3*30%=0.9+15psi=15.9psi).

Those boost curves can be seen when you have the Procede reader open and are different depending on what stage map you run.

I finally understood start boost after reading this post!

Thank you!
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      09-03-2012, 02:34 AM   #8
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Thank you for this, it all makes a lot more sense now, and after reading the manual (like I should have done in the first place) I have a pretty clear understanding now.

Quote:
Originally Posted by GeorgiaTech335coupe View Post
Overboost is the boost safety setting. If you boost over that value for a certain period of time (can't remember off the top of my head), it will force a Procede induced limp mode.

Start boost % is what controls your boost. Yours is at 30%. The way this value is determined is from 2 preset boost curves. The first is the 0% boost curve, the second is the 100% boost curve. If you put your start values at either of these 2 values, you will follow those curves. Any percent in between will add that percent of the difference between the 2 curves and add it to the 0% curve. For instance, if at x rpm 0% boost curve hits 15 psi, while the 100% boost curve hits 18 psi, if your setting is at 30%, then you will hit 15.9 psi (18-15=3*30%=0.9+15psi=15.9psi).

Those boost curves can be seen when you have the Procede reader open and are different depending on what stage map you run.
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