N55 Tuning Options

Mikaeldarer · 02-17-2017, 09:51 AM

I have tried almost every tuning option(JB4, MHD JB4 BEF, custom E30 MHD maps from 2 different tuners) currently available for the N55 so thought I’d do a comprehensive write up to help others make the best choice for their vehicle. I will try to keep this as unbiased as possible, but will be pointing out all pros/cons that I have experienced. Main points I will cover are functionality/smoothness during normal driving, reliability, usability, and of course power. ALL LOGS/GRAPHS will be done back to back including stock for baseline. SAME DAY SAME FUEL.

My car: 2011 E90 335i N55

-K&N Drop-in filter
-Pure Stage 1 turbo
-Decatted OEM downpipe
-ER Charge pipe
-N20 TMAP
-Mishimoto Intercooler
-Pure turbo inlet
-BMS OCC
-BMS Oil Cooler Valve

I am going to start testing this weekend after a fresh oil change. If there is anything I missed above or something specific you would like me to cover just let me know!

JETmn · 02-17-2017, 11:55 AM

Very cool, thanks for doing this! How are you going to measure power, virtual dyno?

mashimarho · 02-17-2017, 12:20 PM

How do you like the decatted OEM DP? Any reason for doing that vs catless aftermarket?

Mikaeldarer · 02-17-2017, 12:50 PM

Quote:

Originally Posted by JETmn

Very cool, thanks for doing this! How are you going to measure power, virtual dyno?

Yes sir, going to be using VD. Not sure if #'s are realistic but should give decent comparison.

Quote:

Originally Posted by mashimarho

How do you like the decatted OEM DP? Any reason for doing that vs catless aftermarket?

Love it! Seems to flow just as well as an aftermarket catless DP. I actually got it off this forum used for $125 and just knocked the ceramic out with a screwdriver.

sirdaft1 · 02-18-2017, 09:16 PM

Quote:

Originally Posted by Mikaeldarer

Love it! Seems to flow just as well as an aftermarket catless DP. I actually got it off this forum used for $125 and just knocked the ceramic out with a screwdriver.

Throwing codes?

Mikaeldarer · 02-19-2017, 12:03 AM

Quote:

Originally Posted by sirdaft1

Throwing codes?

Yes, same as any catless DP

bradsm87 · 02-19-2017, 05:43 AM

Quote:

Originally Posted by Mikaeldarer

Yes sir, going to be using VD. Not sure if #'s are realistic but should give decent comparison.

Love it! Seems to flow just as well as an aftermarket catless DP. I actually got it off this forum used for $125 and just knocked the ceramic out with a screwdriver.

The rapid change of diameter introduces big turbulence and ultimately pressure drop. It's been proven to not improve flow vs leaving the cat in. You need to weld a straight pipe in it.

Mikaeldarer · 02-19-2017, 10:39 AM

Quote:

Originally Posted by bradsm87

The rapid change of diameter introduces big turbulence and ultimately pressure drop. It's been proven to not improve flow vs leaving the cat in. You need to weld a straight pipe in it.

Can you please post a link? Would like to see testing they did. Not arguing, just curious. I haven't had any issues and don't see any huge difference between my logs and others, but I could be missing something http://datazap.me/u/mikaeldarer/wedgee30?log=0&data=5-15-24-25-26-27-28-29&solo=5

weehe126 · 02-19-2017, 12:06 PM

Quote:

Originally Posted by bradsm87

The rapid change of diameter introduces big turbulence and ultimately pressure drop. It's been proven to not improve flow vs leaving the cat in. You need to weld a straight pipe in it.

Actually the turbulance caused by the larger sections helps with transient response. There is a whole write up somewhere on the web for the audi/Volkswagen 1.8t.

mike@x-ph.com · 02-20-2017, 03:46 PM

Sub'd

Bours · 02-26-2017, 10:30 PM

hell yeah ! good idea subbed !

bradsm87 · 02-26-2017, 11:56 PM

Quote:

Originally Posted by weehe126

Actually the turbulance caused by the larger sections helps with transient response. There is a whole write up somewhere on the web for the audi/Volkswagen 1.8t.

Large section directly from the turbo V-Band to help the turbine and wategate flow paths straighten before narrowing - yes. Small to large to small (like a decatted cat) - no.

Tested on many platforms way back in the day. I don't have a desire to go looking for the data again.

Bours · 03-11-2017, 06:13 PM

So when the reviews are coming out ?

Mikaeldarer · 03-12-2017, 01:41 PM

Quote:

Originally Posted by Bours

So when the reviews are coming out ?

Sorry for delay! I haven't had time to do any testing yet and want to make sure I have datalogs to back up any information I post.

02-17-2017, 09:51 AM	#1
Mikaeldarer Second Lieutenant 69 Rep 226 Posts Drives: 2011 e90 335i N55 Join Date: Feb 2015 Location: South Florida iTrader: (0)	N55 Tuning Options I have tried almost every tuning option(JB4, MHD JB4 BEF, custom E30 MHD maps from 2 different tuners) currently available for the N55 so thought I’d do a comprehensive write up to help others make the best choice for their vehicle. I will try to keep this as unbiased as possible, but will be pointing out all pros/cons that I have experienced. Main points I will cover are functionality/smoothness during normal driving, reliability, usability, and of course power. ALL LOGS/GRAPHS will be done back to back including stock for baseline. SAME DAY SAME FUEL. My car: 2011 E90 335i N55 -K&N Drop-in filter -Pure Stage 1 turbo -Decatted OEM downpipe -ER Charge pipe -N20 TMAP -Mishimoto Intercooler -Pure turbo inlet -BMS OCC -BMS Oil Cooler Valve I am going to start testing this weekend after a fresh oil change. If there is anything I missed above or something specific you would like me to cover just let me know! __________________ 2011 E90 N55 / Injen intake / PS2 / Pure inlet / VRSF 7" HD FMIC / VRSF DP / FTP CP's / N20 TMAP / BMS OCC / M3 Front Control Arms / Bilstein B12 Pro-Kit Sport Suspension
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02-17-2017, 11:55 AM	#2
JETmn Lieutenant Colonel 245 Rep 1,595 Posts Drives: 2011 335i xDrive Msport Join Date: Apr 2013 Location: Orlando iTrader: (0) Garage List 2011 335Xi [0.00]	Very cool, thanks for doing this! How are you going to measure power, virtual dyno? __________________ 2011 335Xi 6AT - VRSF catless DP - VRSF 7" FMIC with turbo inlet pipe - VRSF chargepipe - Pure Stage 1 turbo - JB4 - E30 - xHP Stage 3 - Strongflex tension bushings - Whiteline RSFB - UUC rear swaybar
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02-17-2017, 12:20 PM	#3
mashimarho BimmerPost Supporting Vendor 2111 Rep 13,877 Posts Drives: E92 M3 & F80 M3 & G82 M4 Join Date: Mar 2010 Location: Lynnwood, WA iTrader: (45) Garage List 2021 BMW G82 M4 [0.00] 2011 BMW E92 M3 [0.00] 2015 BMW F80 M3 [0.00] 2012 BMW 335i xDrive [9.78]	How do you like the decatted OEM DP? Any reason for doing that vs catless aftermarket? __________________ Mashimarho.com /// Instagram /// Facebook /// Youtube /// sales@mashimarho.com /// (425) 582-7939
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02-20-2017, 03:46 PM	#10
mike@x-ph.com BimmerPost Supporting Vendor 24199 Rep 190,807 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Sub'd __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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02-26-2017, 10:30 PM	#11
Bours Lieutenant Colonel 166 Rep 1,700 Posts Drives: 2011 335i x-drive LCI sedan Join Date: Nov 2014 Location: Montreal iTrader: (0)	hell yeah ! good idea subbed !
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03-11-2017, 06:13 PM	#13
Bours Lieutenant Colonel 166 Rep 1,700 Posts Drives: 2011 335i x-drive LCI sedan Join Date: Nov 2014 Location: Montreal iTrader: (0)	So when the reviews are coming out ?
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