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torr torr is offline
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Default Coding the N55 EKP for E100 fuel. - 08-18-2015, 06:34 PM

I have been testing this for the last 8 months with no problems.


Change all EKP values:
CHARACTERISTIC CURVES, FUNCTIONS, FAULT LIMITS, PUMP PARAMETERS and DATE, PUMP IDENTIFICATION and CHECKSUM ELECTRONICALLY CONTROLLED FUEL PUMP (EKP)
from value 50 to 51
(E90,E91,E92,E93,E87,E88,E81,E82,E84+!ETHANOL_E100 )+(N20,N55)+PU11+EKP_CI_13)

The EKP control unit controls the speed of the EKP by means of pulse width modulation of the EKP output voltage according to the fuel request. The supply characteristic curve of the EKP for the corresponding model series is stored in the coding data. The EKP control unit ensures reliable activation of the EKP up to a system voltage including 6 V.
The Digital Engine Electronics (DME) control unit or Digital Diesel Electronics (DDE) send the requirement request for the amount of fuel currently need to the EKP control unit.
The communication of the EKP control unit with the DME/DDE control unit takes place across the PT-CAN. The required fuel rate is passed on to the EKP control unit by the DME/DDE control unit in a message across the PT-CAN.

The data for the electronically controlled fuel pump system is encoded as follows:

- In the DME control unit or DDE control unit: engine- and model-related characteristic curves for fuel delivery according to requirements.

- In the EKP control unit: specific characteristic curves for the relevant fuel system (= fuel flow rate for cooling and lubrication of the fuel system)

The control variable is sent in the form of a CAN message to the fuel pump control module (EKPS). The control variable is sent in the unit l/h. The value range is 0-254 l/h.

Desired pressure and flow rate can be achieved by manually adjusting the data values in the CHARACTERISTIC CURVES.

I'm hoping Terry can adjust EKP data values to improve the JB4 N55 overall performance.

Also, I'm really interested in hearing how this has affected other Pure stage 2 users.
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2011 335i E92 AT, JB4, FMIC, DP, CP. Pure stg2 w/high flow intake & DV+. Fuel-It! E85 BEF Flash, stg2 LPFP & PI.

Last edited by torr; 08-19-2015 at 05:47 AM.. Reason: update
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Weehe Weehe is offline
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Default 08-18-2015, 06:52 PM

I can vouch for this. Was able to run straight E85 with this. Have been running it for 6 months.
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houtan houtan is offline
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Default 08-18-2015, 07:21 PM

With the stock lpfp?
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Weehe Weehe is offline
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Default 08-18-2015, 07:46 PM

Quote:
Originally Posted by houtan
With the stock lpfp?
yup
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Default 08-18-2015, 09:20 PM

interesting. so i can just code this using ncsexpert? never read the EKP module.
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Default 08-18-2015, 10:01 PM

This change only affects the lpfp, not the hpfp? What if you have stage2 lpfp?


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 08-18-2015, 10:17 PM

Did you start getting error codes? Were you testing this when you made this post?

http://www.n54tech.com/forums/showthread.php?t=30344

If you were getting errors, was it the fuel pump warning that pops up on the i-drive and did it resolve that?



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Default 08-19-2015, 03:19 AM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Did you start getting error codes? Were you testing this when you made this post?

http://www.n54tech.com/forums/showthread.php?t=30344

If you were getting errors, was it the fuel pump warning that pops up on the i-drive and did it resolve that?
Yes,
I was testing E100 coding when that post was created and never had a fuel pump error code.
I would be very interested to see how your stg2 pump performs with this coding.


2011 335i E92 AT, JB4, FMIC, DP, CP. Pure stg2 w/high flow intake & DV+. Fuel-It! E85 BEF Flash, stg2 LPFP & PI.
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Abear Abear is offline
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Default 08-19-2015, 06:17 AM

Do you think this will work on the F30s? The actual control unit is a different part number, but I dont see why we wouldnt be able to code ours as well.
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Default 08-19-2015, 07:01 AM

Even if the Fuel-it stg 2 pump benefits from this better pressure/flow, won't the hpfp capacity remain the same?



2011 E92 N55 xDrive 6MT
Pure Stg 2 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
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255/40-18 square | 8.5x18 ET35
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Default 08-19-2015, 07:39 AM

Correct, the HPFP capacity remains the same.

The EKP already goes to 100% PWM at about 60% load according to the testing we've done but it may be re-scaled at lower loads with this change.

This may also help with the fuel pump errors that occur on some cars as the limits for the amount of current draw the EKP/DME find permissible may be increased.

We'll have to test it.



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Default 08-19-2015, 08:40 AM

Quote:
Originally Posted by houtan
interesting. so i can just code this using ncsexpert? never read the EKP module.
+1, Really curious to this as well. I would love to run straight e85.


2011 E90 335i 388 whp/475wtq on E50
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Default 08-19-2015, 08:46 AM

I'm confused. If all this does is push the max PWM down a bit, how can that increase the pumps capacity to run that much more fuel? If PWM is already maxed out at high load, I would think you must increase the voltage used by PWM to gain any pump speed/pressure.



2011 E92 N55 xDrive 6MT
Pure Stg 2 | DV+ | Pure inlet | MHD/JB4
Stage 2 lpfp | BMS Intake | Shifteck 4-inch "expansion chamber" | MXP catback
VRSF 7" FMIC | ECS 2-piece rotors
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Default 08-19-2015, 09:45 AM

Quote:
Originally Posted by Abear
Do you think this will work on the F30s? The actual control unit is a different part number, but I dont see why we wouldnt be able to code ours as well.
On F series we get crappy hpfp's been there done that.


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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Default 08-19-2015, 05:33 PM

Dear Terry,
Please make the N55 faster.
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2011 335i E92 AT, JB4, FMIC, DP, CP. Pure stg2 w/high flow intake & DV+. Fuel-It! E85 BEF Flash, stg2 LPFP & PI.
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Default 08-21-2015, 06:13 AM

Power gains on stock turbo?


2011 E90 335i 388 whp/475wtq on E50
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Default 08-24-2015, 11:57 AM

I would lovvveeeee to run straight e85 on my f30


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Default 08-25-2015, 07:57 AM

Has anyone given the E100 coding a try yet? Steve?
I am interested in hearing your impressions.


2011 335i E92 AT, JB4, FMIC, DP, CP. Pure stg2 w/high flow intake & DV+. Fuel-It! E85 BEF Flash, stg2 LPFP & PI.
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Default 08-25-2015, 08:00 AM

I haven't had time to try it yet.

I'll try to get time today or tomorrow.



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Default 09-04-2015, 11:54 AM

Steve,
Did you ever get a chance to try this?


2011 335i E92 AT, JB4, FMIC, DP, CP. Pure stg2 w/high flow intake & DV+. Fuel-It! E85 BEF Flash, stg2 LPFP & PI.
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Default 09-04-2015, 03:12 PM

I neeeddddsssss this


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Default 09-04-2015, 05:13 PM

Nope...I went to try it and realized I was going to have to configure NCS Expert on that computer...it's been a while since I've played with that so I never got around to it.



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paradoxical3 paradoxical3 is offline
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Default 09-05-2015, 09:53 AM

I don't understand, in my TRC file the values already seem to be set to 51? Except for Functions, for which numerous are selected. Should I de-select all of the other wert values except 51?

This is on a 2014 X1 35i M Sport for the USA.
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Default 09-05-2015, 12:02 PM

select CHARACTERISTIC CURVES Value 51, this will unselect value 50.
FUNCTIONS value 51 should already be selected with values (50,55,56,59).
FAULT LIMITS value 51 should already be selected with value 50.
PUMP PARAMETERS value 51 should already be selected with value 50.
select DATE AND PUMP IDENTIFICATION Value 51, this will unselect value 50.
select CHECKSUM ELECTRONICALLY CONTROLLED FUEL PUMP (EKP) Value 51, this will unselect value 50.
then program.


2011 335i E92 AT, JB4, FMIC, DP, CP. Pure stg2 w/high flow intake & DV+. Fuel-It! E85 BEF Flash, stg2 LPFP & PI.
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paradoxical3 paradoxical3 is offline
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Default 09-05-2015, 07:14 PM

Thanks torr, but my EKP already has exactly those values. It seems there is nothing for me to code as it came stock that way

Last edited by paradoxical3; 09-05-2015 at 07:24 PM..
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