N54 RB Ones Arrived

wheela

Lieutenant
Jun 4, 2021
1,128
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Twin Cities, MN
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2015 e84 X1 35i Msport
I think so. I think the issue why it was falling flat after 120mph was mostly due to the lpfp not being able to keep up with the demands of the turbos and tune.

Honestly I don't plan on flying around at anything past 120mph. The pump feels like it made a difference off the line too as the engine isn't starving for fuel anymore.

I didn't have any misfires. However @carabuser did mention to me that the fuel delivery was struggling to keep up.

Should I have had misfires?

Maybe it's in my head is pulling more at higher speeds.
I just thought that as fueling couldn't keep up, your hpfp would start to sag, and at a low enough rail pressure you'd start to misfire. I didn't occur to me there may be a point of lower power before misfiring, but I don't know - I've never ran out of fuel capacity on my stock turbo and 93oct OTS tune.
 
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TheFixer

Sergeant
Aug 16, 2020
493
352
0
Tennessee
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2008 535i
Been reading about some things after a fuel pump upgrade as I'm getting intermitt exclamation triangle on my dash when I get on the peddle.

Only code is in shadow codes. "Control voltage to high"

Is this overheating or just voltage out of parameters?

Some threads say to replace the EKP module. Others say change the voltage parameters for the EKP module.

@NoGuru I saw some post from you about this. What do you think?
 

TheFixer

Sergeant
Aug 16, 2020
493
352
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Tennessee
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2008 535i
Weird honestly. I ran a 450 in the 535 for a year no issues.
spweh.jpg
 
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TheFixer

Sergeant
Aug 16, 2020
493
352
0
Tennessee
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2008 535i
Do some draggy runs if you get a chance. Curious how much faster your car is with the Rb ones compared to my oem billets
Official drag runs?

There is a strip near me. I need to figure out all the xhp options to set up my transmission right for that.
 

Torgus

Brigadier General
Nov 6, 2016
2,671
2,194
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Boston
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ACF 6466 E92 + METH
The vader stage 2 + pump is a Walbro 525 right? It draws a bit more than the 450s. Some people seem to have EKP issues, other do not iirc.

You could always do the EKP cooling mods as they are cheap and see if it fixes the problem.
 
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TheFixer

Sergeant
Aug 16, 2020
493
352
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Tennessee
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2008 535i
The vader stage 2 + pump is a Walbro 525 right? It draws a bit more than the 450s. Some people seem to have EKP issues, other do not iirc.

You could always do the EKP cooling mods as they are cheap and see if it fixes the problem.
I think it is a DW400.

Yeah. That's easy to do and a good idea anyway to keep modules cool.

My code is high voltage related though. So that tells me the parameters probably need changing.
 

NoGuru

Captain
Jan 9, 2018
1,206
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Just North of Detroit
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BMW 335is
Been reading about some things after a fuel pump upgrade as I'm getting intermitt exclamation triangle on my dash when I get on the peddle.

Only code is in shadow codes. "Control voltage to high"

Is this overheating or just voltage out of parameters?

Some threads say to replace the EKP module. Others say change the voltage parameters for the EKP module.

@NoGuru I saw some post from you about this. What do you think?
Sounds like changing the perameters would help vs cooling. I would start there but it never hurts to improve the cooling.
What is the fuel system setup again?
 
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I am Jacks N54

Specialist
Sep 10, 2018
81
1
52
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Ventura, CA
Ride
e90 335i
Try the voltage fix first. If you have Protool, it's here: Drivetrain > Fuel Pump > Functions > Voltage Fix

Found this on the Vader site on the stage 2+:
Fuel pump upgrades
tend to pull more current over the stock pumps..
this will lead to overheating EKP modules and
limp IF THE CURRENT EKP IN YOUR CAR IS WEAK...
if this is the case the ekp will need to be
replaced and or upgraded to the EKP3 variant.
 
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I am Jacks N54

Specialist
Sep 10, 2018
81
1
52
0
Ventura, CA
Ride
e90 335i

TheFixer

Sergeant
Aug 16, 2020
493
352
0
Tennessee
Ride
2008 535i