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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > mhd stage 2+ not as i hoped it would be



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      07-07-2020, 05:15 PM   #1
Airjaff
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mhd stage 2+ not as i hoped it would be

Hello

I have a e92 n55 manual

Flashed stage 2+ i have full bolt ons and air intake. I Hear people saying that without dtc on the wheels spin like crazy, this doesnt happen on mine. Also seems that i have to go wot to feel good pull (not sure if it meant to be like this). I thought peak target boost should be 20psi? I am also not hitting target boost.

Please have a look at my log

https://datazap.me/u/airjaff/logs-07...ta=3-4-5-12-13
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      07-07-2020, 05:51 PM   #2
TheGoodTheBadTheUgly
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Peak target boost is actually 18 PSI. You can look it up on the MHD N55e webpage when you scroll down to Stage 2 Maps: https://mhdtuning.com/products/mhd-s...cense-for-n55e
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      07-07-2020, 05:59 PM   #3
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You need to take a proper log. Use 3rd gear and go from 2500 to 6000 rpm. There's instructions in here, post here also; https://www.e90post.com/forums/showthread.php?t=1269588
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      07-07-2020, 09:25 PM   #4
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Quote:
Originally Posted by Airjaff View Post
Hello

I have a e92 n55 manual

Flashed stage 2+ i have full bolt ons and air intake. I Hear people saying that without dtc on the wheels spin like crazy, this doesnt happen on mine. Also seems that i have to go wot to feel good pull (not sure if it meant to be like this). I thought peak target boost should be 20psi? I am also not hitting target boost.

Please have a look at my log

https://datazap.me/u/airjaff/logs-07...ta=3-4-5-12-13
Sounds like u might have linear throttle enabled ?!
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      07-08-2020, 04:08 AM   #5
Airjaff
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Quote:
Originally Posted by IllSic_Design View Post
You need to take a proper log. Use 3rd gear and go from 2500 to 6000 rpm. There's instructions in here, post here also; https://www.e90post.com/forums/showthread.php?t=1269588
Hello, thanks. Sorry i think i pasted the wrong log

https://datazap.me/u/airjaff/logs-07...60&mark=69-159
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      07-08-2020, 04:12 AM   #6
Airjaff
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Quote:
Originally Posted by Pladi View Post
Sounds like u might have linear throttle enabled ?!
Yea it sounds and feels like it, but its not enabled. I've tried another e92 without linear throttle, you press the throttle a bit and feels like power kicks in right away. This was a dct car though. I don't know if this is how the manual cars are mapped?
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      07-08-2020, 04:14 AM   #7
Airjaff
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Peak target boost is actually 18 PSI. You can look it up on the MHD N55e webpage when you scroll down to Stage 2 Maps: https://mhdtuning.com/products/mhd-s...cense-for-n55e
oh yea, my mistake
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      07-08-2020, 06:55 AM   #8
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Looks like ur quite a bit off target. You should be making more boost
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      07-08-2020, 10:32 AM   #9
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You're all over the place with the throttle, even on that last log. There's not a whole lot to tell from it, but you overboosted at first which resulted in a lot of throttle closure. I'm sure it felt slow right there. Past that it's hitting boost target pretty well, but it's hard to tell much since you were in and out of the throttle. Do a proper run at WOT through 3rd gear and we can tell a lot more.
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      07-08-2020, 11:44 AM   #10
Airjaff
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Quote:
Originally Posted by CoffeeBean View Post
You're all over the place with the throttle, even on that last log. There's not a whole lot to tell from it, but you overboosted at first which resulted in a lot of throttle closure. I'm sure it felt slow right there. Past that it's hitting boost target pretty well, but it's hard to tell much since you were in and out of the throttle. Do a proper run at WOT through 3rd gear and we can tell a lot more.
Thanks for your input. I'll do another log when the weather gets better. I was doing the run on a country road so was pretty scary going that fast on a road which was narrow and sightly bumpy.

I'll post a new log as soon as I have it, thanks
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      07-08-2020, 09:25 PM   #11
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Quote:
Originally Posted by Airjaff View Post
Thanks for your input. I'll do another log when the weather gets better. I was doing the run on a country road so was pretty scary going that fast on a road which was narrow and sightly bumpy.

I'll post a new log as soon as I have it, thanks
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