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Default N55 Large Turbo Tuning Info - 05-06-2014, 03:44 PM

Hey guys,

Enough people are adding larger turbos to their N55 now that it makes sense to maintain a single thread to use for tuning information, questions, etc. I'll add some info to this first post and update it with common questions as they come up.

First some general info. There are several turbo updates out there. The "stage2" turbos like the Vargas & PURE "stage2" are significantly larger than stock and require special tuning considerations, while the various "stage1" turbos (wheel swaps) are closer to stock and can generally use the same factory turbo tuning. The info below is more geared towards the "stage2" turbos. Those with "stage1" can probably get away without the back end flash, without a meth kit, etc, if they choose.

N55 Hybrid Turbo Tuning Requirements:

All models:

A N20 3.5bar TMAP sensor is required. Note those with a typeA harness need the adapter on our site. While those with typeB do not need an adapter to connect the 3.5bar TMAP sensor. The required sensor is BMW part number: 13627843531


E Series:

1) Run the latest JB4_N55 firmware
2) A JB4 MHD back end flash map is strongly suggested. We provide these maps free of charge as well as tuning support via the n54tech forum, but MHD charges a $199 fee for their flashing tool. Use the PUMP file as a starting point: http://www.n54tech.com/forums/showthread.php?t=43151
3) Enter the default settings in the second post. Note FutureUseD=64 disables "RPM FF Gain", which allows you to manually enter a duty bias curve that is more appropriate to larger turbos. For pump fuel start with map2, for E85 start with a 40 additive, and log, so we can help you dial it in from there.

F Series Pneumatic Wastegate:

1) JB4_N55 running F series ISO firmware required: http://www.n54tech.com/forums/showthread.php?t=47223
2) A back end flash map is required which can be loaded via MHD. Start with the PUMP map: http://www.n54tech.com/forums/showthread.php?t=51166

F Series Electronic Wastegate:

1) JB4_F30 running F series EWG firmware and EWG add on harness
2) A back end flash map is required which can be loaded via MHD. Start with the PUMP map: http://www.n54tech.com/forums/showthread.php?t=51166

Be sure to checkout our F chassis turbo inlet! https://www.burgertuning.com/product...w-intake-inlet

Maps:

When running a 3.5bar TMAP sensor with E series ISO firmware the map peak boost targets are as follows:

Map1: 16psi
Map2: 19psi
Map3: Progressive meth from 16psi to 25psi based on additive
Map5: Autolearning from 16psi to 20psi based on average timing
Map6: Custom map
Map 7: 20psi

Other Details:

1) The map and tuning settings will vary greatly depending on the specific turbo, fuel, and other car specific details. See E series N55 suggested settings below.
2) For those running E85 without methanol a Stage2 fuel pump from Fuel-IT is suggested.
3) For mixtures of 50% E85 or more we suggest port injection or a methanol kit.

Test Results:

PURE S2 N55 Recent Results: http://www.n54tech.com/forums/showthread.php?t=40044

PURE Stage2 435i EWG Dyno Testing: http://www.n54tech.com/forums/showthread.php?t=29245

PURE Stage2 DCT Pneumatic WG Dyno: http://www.n54tech.com/forums/showthread.php?t=30329

PURE Stage1 EWG Dyno: http://www.n54tech.com/forums/showthread.php?t=26268

Vargas Stage2 135i DCT Pneumatic WG Dyno: http://www.n54tech.com/forums/showthread.php?t=28341

Vargas Stage2 335i Automatic Pneumatic WG Dyno: http://www.n54tech.com/forums/showthread.php?t=22618

Vargas Stage2 335i Track Testing: http://www.n54tech.com/forums/showthread.php?t=22647

Vargas Stage1 335i Dyno: http://www.n54tech.com/forums/showthread.php?t=30328


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Last edited by Steve @ BMS/Fuel-It!; 05-18-2016 at 09:59 AM..
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Default 05-06-2014, 09:04 PM

Hey guys,

I'll use this post to throw up example settings and things from our various N55 larger turbo projects.

Here are the custom settings we came up with for PURE TURBO's E series development car. JB4 ISO, MT, E50, port injection (although meth could be used in place of PI with a small nozzle), and our back end flash map. Note for this dutybias "Disable RPM FF Gain" must be set under the FUD bit options.



Dyno result of this setup are here: http://www.n54tech.com/forums/showthread.php?t=31534
Attached Images
 


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 06-25-2015, 12:51 PM

Quote:
Originally Posted by Terry @ BMS
Hey guys,

I'll use this post to throw up example settings and things from our various N55 larger turbo projects.

Here are the custom settings we came up with for PURE TURBO's E series development car. JB4 ISO, MT, E50, port injection (although meth could be used in place of PI with a small nozzle), and our E85 back end flash map. Dyno result of this setup are here: http://www.n54tech.com/forums/showthread.php?t=31534
i noticed in the post you stated these are the setting for e50 fuel with a BEF. i see you didnt post the newest e85 BEF yet but the FOL is set at 80. with my "HT LEANER" BEF i have my FOL at 0. was this 80 setting for pump/racefuel or is the BEF im running required still to stay at 0 with E50? SHOULD I UPDATE TO NEWEST E85 FLASH WHEN POSTED? thanks


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Default 06-25-2015, 05:49 PM

Quote:
Originally Posted by Newguy123
i noticed in the post you stated these are the setting for e50 fuel with a BEF. i see you didnt post the newest e85 BEF yet but the FOL is set at 80. with my "HT LEANER" BEF i have my FOL at 0. was this 80 setting for pump/racefuel or is the BEF im running required still to stay at 0 with E50? SHOULD I UPDATE TO NEWEST E85 FLASH WHEN POSTED? thanks
I think you might need to up the FOL.
I am trying it out and it seems pretty lean with FOL set at 0, like 13.5 at WOT and idling at 16-17:1.
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Default 06-25-2015, 06:34 PM

Quote:
Originally Posted by Nugs
I think you might need to up the FOL.
I am trying it out and it seems pretty lean with FOL set at 0, like 13.5 at WOT and idling at 16-17:1.
I'll have to check what it's running at idle. I'm so hesitant to change anything bc I'm running 22psi to 5500 and 21 to redline. Car is hauling ass and not misfiring. Always seems like when I dick with the settings she misfires like cray


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Default 06-25-2015, 06:43 PM

Quote:
Originally Posted by Newguy123
I'll have to check what it's running at idle. I'm so hesitant to change anything bc I'm running 22psi to 5500 and 21 to redline. Car is hauling ass and not misfiring. Always seems like when I dick with the settings she misfires like cray
Ignore my previous post, apparently it is fine as is.
It is set leaner than the flash you are using right now.
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Default 06-25-2015, 06:23 PM

Quote:
Originally Posted by Newguy123
i noticed in the post you stated these are the setting for e50 fuel with a BEF. i see you didnt post the newest e85 BEF yet but the FOL is set at 80. with my "HT LEANER" BEF i have my FOL at 0. was this 80 setting for pump/racefuel or is the BEF im running required still to stay at 0 with E50? SHOULD I UPDATE TO NEWEST E85 FLASH WHEN POSTED? thanks
The short answer is who knows. Every car and situation is unique. So evaluate the data from your car and based on that decide what makes the most sense for it. But off the cuff I think the new E85 flash is similar to the special flash you are currently running.


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Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 03-03-2016, 10:20 PM

Quote:
Originally Posted by Terry @ BMS
Hey guys,

I'll use this post to throw up example settings and things from our various N55 larger turbo projects.

Here are the custom settings we came up with for PURE TURBO's E series development car. JB4 ISO, MT, E50, port injection (although meth could be used in place of PI with a small nozzle), and our E85 back end flash map. Dyno result of this setup are here: http://www.n54tech.com/forums/showthread.php?t=31534
Are these setting ok to use if I don't have the e85 BEF?


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Default 05-06-2014, 09:15 PM

How much ethanol can you run with this back end flash?
I have a larger lpfp.
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Default 05-07-2014, 08:42 AM

As much as the high pressure pump can take. I'd guess around 60% at 450whp.


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Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 05-07-2014, 02:50 PM

Quote:
Originally Posted by Terry @ BMS
As much as the high pressure pump can take. I'd guess around 60% at 450whp.
I have pure stage 1: My FP H number went up alot after I have the flex fuel wire installed. It was always at 7 to 5 range but now is 11 to 15.

Log attached, meth was spraying but not shown in the log bcos is a xx xx meth kit still waiting to install the failsafe wire. Pls advice on the log, thanks.


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Default 05-07-2014, 02:53 PM

Sorry boost setting was here.
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2014/2009 M4/335 COUPE
FULL CF Add On All around, Gloss/Matt Custom Wrap
JB4 Stack On BM3/MHD ECU tune, Upgraded S2 Turbo
Custom Cold Air, Dual nozzle charge pipe
SSP 900 Clutch kit, Custom Spoiler
AndyTuning Custom Map 6
SS DP n FULL Custom Exhaust
Custom BC forge 18/17 set up
Brembo Gt 380mm F&R/ 355mm F&R
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Default Pure turbo stage1 dyno - 05-07-2014, 03:27 PM

Just wanted to share my results with you all. Car feels like a small rocket.
However the car did not hit boost levels that it does on the street. I guess cooling issue? Still very happy with the results.
3 runs pure with different boost levels:


And comparing best run with stock, jb4 map 3 40 meth adder:


The corresponding csvs:
max
daily
15psi
stockmap3


F21 M140i - 100-200: 5.18 60-130: 5.96
Audi TTRS - 100-200: 4.01 60-130: 4.5
F80 M3 - 100-200: 4.32, 60-130: 4.8
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
peter@pureturbos.eu
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Last edited by Peter @ Pure; 05-09-2014 at 08:38 AM.. Reason: Changed graphs from crank hp to whp
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andym3100k andym3100k is offline
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Default 05-07-2014, 03:56 PM

Wow, 647Mn of Torque. Did I read it correctly?

I'm going on the same dyno today with my smaller 20" inch wheels n newly installed flex fuel wire with different set up maps & boost. Will post results after that.

Bro, what boost chart on different RPM will u running with the highest power gain?


2014/2009 M4/335 COUPE
FULL CF Add On All around, Gloss/Matt Custom Wrap
JB4 Stack On BM3/MHD ECU tune, Upgraded S2 Turbo
Custom Cold Air, Dual nozzle charge pipe
SSP 900 Clutch kit, Custom Spoiler
AndyTuning Custom Map 6
SS DP n FULL Custom Exhaust
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Default 05-07-2014, 05:51 PM

Quote:
Originally Posted by andym3100k
I have pure stage 1: My FP H number went up alot after I have the flex fuel wire installed. It was always at 7 to 5 range but now is 11 to 15.

Log attached, meth was spraying but not shown in the log bcos is a xx xx meth kit still waiting to install the failsafe wire. Pls advice on the log, thanks.
FP is only logged once the connector is added. Log seems fine. More boost would be nice but you might be at the limit of your setup as PWM is at 100%.

I'll modify the F series integrated firmware shortly to include these options. Then you'll use FUB = 2 with your map 6 if you want to stay with map 6.

Quote:
Meth Safety (was FUB):

0 - Raise boost as a function of meth flow & historic timing (default)
1 - Raise boost as a function of meth flow only
2 - Start at high boost target and reduce IF flow drops below flow level for 1 second under boost.
3 - Start at high boost target and disable all safety systems. Meth flow is completely ignored.

Meth Enable (was FUE):

0 - Meth flows on maps 3, 6, and 7 (default operation)
1 - Meth flows on all maps
2 - Meth flows on map 3 only
3 - Meth is disabled on all maps


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 05-07-2014, 08:48 PM

Quote:
Originally Posted by Terry @ BMS
FP is only logged once the connector is added. Log seems fine. More boost would be nice but you might be at the limit of your setup as PWM is at 100%.

I'll modify the F series integrated firmware shortly to include these options. Then you'll use FUB = 2 with your map 6 if you want to stay with map 6.
Thanks, so after changing the FUB to 2. I still need to install the failsafe wire right or I don't need it anymore?


2014/2009 M4/335 COUPE
FULL CF Add On All around, Gloss/Matt Custom Wrap
JB4 Stack On BM3/MHD ECU tune, Upgraded S2 Turbo
Custom Cold Air, Dual nozzle charge pipe
SSP 900 Clutch kit, Custom Spoiler
AndyTuning Custom Map 6
SS DP n FULL Custom Exhaust
Custom BC forge 18/17 set up
Brembo Gt 380mm F&R/ 355mm F&R
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Default 05-07-2014, 10:12 PM

Quote:
Originally Posted by Terry @ BMS
I'll modify the F series integrated firmware shortly to include these options. Then you'll use FUB = 2 with your map 6 if you want to stay with map 6.
Looking forward to this firmware


F21 M140i - 100-200: 5.18 60-130: 5.96
Audi TTRS - 100-200: 4.01 60-130: 4.5
F80 M3 - 100-200: 4.32, 60-130: 4.8
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 05-07-2014, 06:03 PM

Quote:
Originally Posted by Terry @ BMS
As much as the high pressure pump can take. I'd guess around 60% at 450whp.
I didn't think the n55 had high pressure pumps any more. I know the dealer told me when I bought my new 435 it did not have a high pressure pump. Because of all the problems associated with them on the n54 motors.


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andym3100k andym3100k is offline
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Default 05-07-2014, 08:40 PM

Quote:
Originally Posted by Hellraiserharris
I didn't think the n55 had high pressure pumps any more. I know the dealer told me when I bought my new 435 it did not have a high pressure pump. Because of all the problems associated with them on the n54 motors.
Are u sure? It was live moving numbers on my jb4 mobile apps screen when I step on the gas meaning it is pumping the fuel.


2014/2009 M4/335 COUPE
FULL CF Add On All around, Gloss/Matt Custom Wrap
JB4 Stack On BM3/MHD ECU tune, Upgraded S2 Turbo
Custom Cold Air, Dual nozzle charge pipe
SSP 900 Clutch kit, Custom Spoiler
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SS DP n FULL Custom Exhaust
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Default 05-08-2014, 03:33 AM

Quote:
Originally Posted by andym3100k
Are u sure? It was live moving numbers on my jb4 mobile apps screen when I step on the gas meaning it is pumping the fuel.
I quess my sales and service advisers are idiots. I did some searches and found out we still have the high pressure pumps.


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andym3100k andym3100k is offline
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Default 05-08-2014, 07:15 AM

Just got back from the same dyno, manage to push another 42PS from Map 6 with different boost setting.

Old & New Dyno Chart.

3 Different Log:
Map 5: Seem to be very constant & smooth power at 300ps. (only did 2 run, didn't let it adapt for long enough, 2nd run the power was the same)
Map 6: Most powerful after the custom tune. ( gain another 42ps which is more than 50hp now at 336ps)
Map 7: Also very smooth n constant power at 327ps.
Map 0: With all my FBO at 276ps.
Stock N55 should be running not more than 230ps on the same dyno machine.

Hi Terry, can advise on the map 6 & why there is a lag around the 2700rpm?
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2014/2009 M4/335 COUPE
FULL CF Add On All around, Gloss/Matt Custom Wrap
JB4 Stack On BM3/MHD ECU tune, Upgraded S2 Turbo
Custom Cold Air, Dual nozzle charge pipe
SSP 900 Clutch kit, Custom Spoiler
AndyTuning Custom Map 6
SS DP n FULL Custom Exhaust
Custom BC forge 18/17 set up
Brembo Gt 380mm F&R/ 355mm F&R
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Default 05-10-2014, 06:42 AM

Quote:
Originally Posted by Hellraiserharris
I didn't think the n55 had high pressure pumps any more. I know the dealer told me when I bought my new 435 it did not have a high pressure pump. Because of all the problems associated with them on the n54 motors.
ALL direct injection engines operate with fuel pressures in the 100-170 bar range (about 1500-2500 psi) at the rail so there is a high pressure fuel pump.
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Default 05-07-2014, 09:26 PM

Quote:
Originally Posted by Terry @ BMS
As much as the high pressure pump can take. I'd guess around 60% at 450whp.
So potentially I could fill with E60ish and run a custom map6 and just change the JB4 to map 2 or 5 if I need to fill up with normal pump fuel?
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Default 05-08-2014, 11:03 PM

Quote:
Originally Posted by Nugs
So potentially I could fill with E60ish and run a custom map6 and just change the JB4 to map 2 or 5 if I need to fill up with normal pump fuel?
Hi Terry can you confirm if this is the case or would I also need to change flashes when I change fuels.
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Default 05-11-2014, 06:23 PM

Quote:
Originally Posted by Nugs
So potentially I could fill with E60ish and run a custom map6 and just change the JB4 to map 2 or 5 if I need to fill up with normal pump fuel?
Quote:
Originally Posted by Nugs
Hi Terry can you confirm if this is the case or would I also need to change flashes when I change fuels?
Curious if this is the case as I would love this flexibility.

Also is the backend flash help out with DCT shifting?
I was getting some slurring of shifts with JB4 only.
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