B58 HPFP mod to N55 possible

Bmw doubles · 06-05-2019, 06:21 AM

Hey y'all there's a thread with a few people that have used the B58 HPFP plunger and modded wiring harness with claims of 13% higher fueling. I'm following the thread and investigating more but if all is true then the XDI $2k HPFP can be skipped.

HPFP New Option https://f30.bimmerpost.com/forums/sh....php?t=1589774

doodlebro · 06-05-2019, 12:54 PM

The B58 HPFP is only better because its volumetric efficiency is slightly better than the N55 HPFP. The XDI pump has different sized pistons... I think XDI came in to explain a lot of their engineering & design on that thread.

This doesn't mean that the XDI can be skipped, especially if you're trying to put down serious power.

ziekxq · 06-05-2019, 01:45 PM

I have the old school n54 style hpfp, which I know flows better than later 535i's. Would this be benefit over that hpfp?

Bmw doubles · 06-05-2019, 09:37 PM

Quote:

Originally Posted by doodlebro

The B58 HPFP is only better because its volumetric efficiency is slightly better than the N55 HPFP. The XDI pump has different sized pistons... I think XDI came in to explain a lot of their engineering & design on that thread.

This doesn't mean that the XDI can be skipped, especially if you're trying to put down serious power.

True if you're heading for 600 plus. I guess i meant if you're looking for 500whp range. Also yes I read their whole post about the science of fuel flow.

$howtime456 · 06-10-2019, 03:49 PM

Quote:

Originally Posted by Bmw doubles

True if you're heading for 600 plus. I guess i meant if you're looking for 500whp range. Also yes I read their whole post about the science of fuel flow.

Bro i just installed the XDi 35. Night and Day difference!!!

Bmw doubles · 06-11-2019, 04:21 AM

Quote:

Originally Posted by $howtime456

Quote:

Originally Posted by Bmw doubles

True if you're heading for 600 plus. I guess i meant if you're looking for 500whp range. Also yes I read their whole post about the science of fuel flow.

Bro i just installed the XDi 35. Night and Day difference!!!

Oh shit car is more responsive, power, etc?

$howtime456 · 06-11-2019, 08:35 PM

Quote:

Originally Posted by Bmw doubles

Oh shit car is more responsive, power, etc?

Brooo... the delivery once you mash on the gas is crazy.. i havent got it tuned yet.. still on my previous tune but hoping to break 570+ with the new upgrades. I tested the pump on e45 and it held up perfect.

Bmw doubles · 06-12-2019, 07:19 PM

Quote:

Originally Posted by $howtime456

Quote:

Originally Posted by Bmw doubles

Oh shit car is more responsive, power, etc?

Brooo... the delivery once you mash on the gas is crazy.. i havent got it tuned yet.. still on my previous tune but hoping to break 570+ with the new upgrades. I tested the pump on e45 and it held up perfect.

Do you have a upgraded lpfp?

Bmw doubles · 06-13-2019, 10:34 PM

And we're off to the races.

ziekxq · 06-14-2019, 11:02 AM

I still wonder if this flows better than the n54 style hpfp.

Bmw doubles · 06-14-2019, 04:25 PM

Quote:

Originally Posted by ziekxq

I still wonder if this flows better than the n54 style hpfp.

Anything flows better than a N55 hpfp

ziekxq · 06-14-2019, 04:30 PM

Quote:

Originally Posted by Bmw doubles

Anything flows better than a N55 hpfp

I guess makes sense why I am hitting 20psi, I just want to know if there will be any benefit for me to this route or if this pump share similar flow to n54 hpfp.

Bmw doubles · 06-14-2019, 06:35 PM

Quote:

Originally Posted by ziekxq

Quote:

Originally Posted by Bmw doubles

Anything flows better than a N55 hpfp

I guess makes sense why I am hitting 20psi, I just want to know if there will be any benefit for me to this route or if this pump share similar flow to n54 hpfp.

I'll datalog and we can go over the results

$howtime456 · 06-17-2019, 02:21 PM

NICE!!!

$howtime456 · 06-17-2019, 02:22 PM

Quote:

Originally Posted by ziekxq

I still wonder if this flows better than the n54 style hpfp.

even if it does the n54 is plunger style so def. cant use it on our motors.

$howtime456 · 06-17-2019, 02:24 PM

Quote:

Originally Posted by Bmw doubles

Do you have a upgraded lpfp?

yes sir. Precision Raceworks LPFP. Yo have you thought about opting for the Evolution Race Fuel Pump Module. I bought it.. bit on the expensive side but fuel flow was more stable and ekpm3 wasnt collapsing like the oem was.

ziekxq · 06-17-2019, 02:31 PM

Quote:

Originally Posted by $howtime456

even if it does the n54 is plunger style so def. cant use it on our motors.

My 535i has the n54 style hpfp. Its the early 2011 production car.

PepMo · 08-13-2019, 05:25 AM

Sorry everyone, noob here. Anyone successfully run the XDI-60 pump on a BMW yet? I purchased the XDi-60 since May and still have not been able to get it to run correctly. I have an F10 535 PWG running BM3. At first install the car did not start even with the XDI60 checkbox marked in config. It took two weeks, but finally TTFS and BM3 was finally able to get the parameters right so the car is running now. However, it can't support 15+ PSI of boost without HPFP dropping to 800 PSi. TTFS are telling me that my Fuel-It Stage 2 pump is the problem now. My log is showing that the LPFP is at 84 PSI at any boost or RPM. I've read that the F10 does not have a low pressure fuel sensor so where is the BM3 getting this 84 PSI number from? If anyone have any theories, please chime in.

bmw5sport · 08-13-2019, 12:33 PM

Quote:

Originally Posted by PepMo

Sorry everyone, noob here. Anyone successfully run the XDI-60 pump on a BMW yet? I purchased the XDi-60 since May and still have not been able to get it to run correctly. I have an F10 535 PWG running BM3. At first install the car did not start even with the XDI60 checkbox marked in config. It took two weeks, but finally TTFS and BM3 was finally able to get the parameters right so the car is running now. However, it can't support 15+ PSI of boost without HPFP dropping to 800 PSi. TTFS are telling me that my Fuel-It Stage 2 pump is the problem now. My log is showing that the LPFP is at 84 PSI at any boost or RPM. I've read that the F10 does not have a low pressure fuel sensor so where is the BM3 getting this 84 PSI number from? If anyone have any theories, please chime in.

Yeah, I have had the same issue just not as bad. I can get higher boost but I have shutdown do to fuel. To me the hpfp quits. But as you were told, I was told the same thing the lpfp. I have been dyno'd at about 450hp but wanted a little more on the low end. That tune started to cause the problem your having now. Got a little burn out trying to chase all the problems I did have before this. Had to take a break and just put the consistent tune back in it. Hope someone can figure this one out so I can turn it up

Bmw doubles · 08-13-2019, 01:41 PM

Quote:

Originally Posted by bmw5sport

Quote:

Originally Posted by PepMo

Sorry everyone, noob here. Anyone successfully run the XDI-60 pump on a BMW yet? I purchased the XDi-60 since May and still have not been able to get it to run correctly. I have an F10 535 PWG running BM3. At first install the car did not start even with the XDI60 checkbox marked in config. It took two weeks, but finally TTFS and BM3 was finally able to get the parameters right so the car is running now. However, it can't support 15+ PSI of boost without HPFP dropping to 800 PSi. TTFS are telling me that my Fuel-It Stage 2 pump is the problem now. My log is showing that the LPFP is at 84 PSI at any boost or RPM. I've read that the F10 does not have a low pressure fuel sensor so where is the BM3 getting this 84 PSI number from? If anyone have any theories, please chime in.

Yeah, I have had the same issue just not as bad. I can get higher boost but I have shutdown do to fuel. To me the hpfp quits. But as you were told, I was told the same thing the lpfp. I have been dyno'd at about 450hp but wanted a little more on the low end. That tune started to cause the problem your having now. Got a little burn out trying to chase all the problems I did have before this. Had to take a break and just put the consistent tune back in it. Hope someone can figure this one out so I can turn it up

$howtime456 has a lot of experience with recent fueling upgrades.

bmw5sport · 08-13-2019, 01:58 PM

Is the problem with the hpfp or the lpfp? I'm not getting codes for the lpfp.

Bmw doubles · 08-13-2019, 02:57 PM

Quote:

Originally Posted by bmw5sport

Is the problem with the hpfp or the lpfp? I'm not getting codes for the lpfp.

There is a recall for your lpfp so that's one thing.
The problem in our cars is really the hpfp. Upgrading that I believe will solve most fueling problems for our platform.

06-05-2019, 06:21 AM	#1
Bmw doubles Dream crusher 923 Rep 2,422 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	Hey y'all there's a thread with a few people that have used the B58 HPFP plunger and modded wiring harness with claims of 13% higher fueling. I'm following the thread and investigating more but if all is true then the XDI $2k HPFP can be skipped. HPFP New Option https://f30.bimmerpost.com/forums/sh....php?t=1589774 __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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06-05-2019, 12:54 PM	#2
doodlebro Lieutenant 117 Rep 468 Posts Drives: '17 X3 35i Join Date: Mar 2017 Location: Denver iTrader: (1)	The B58 HPFP is only better because its volumetric efficiency is slightly better than the N55 HPFP. The XDI pump has different sized pistons... I think XDI came in to explain a lot of their engineering & design on that thread. This doesn't mean that the XDI can be skipped, especially if you're trying to put down serious power. __________________ Current mods Rockford Fosgate P3 // JBL MS-A5001 // MiniDSP Ultra Racing Strut Brace // AFe Pro Dry S // PS2 // Custom Inlet // DV+ // FTP Boost Pipes // VRSF Race IC // VRSF Downpipe // ECUTek Protune @ 5280'
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06-05-2019, 01:45 PM	#3
ziekxq Major 281 Rep 1,206 Posts Drives: 2011 535i xDrive Join Date: Feb 2016 Location: United States iTrader: (0)	I have the old school n54 style hpfp, which I know flows better than later 535i's. Would this be benefit over that hpfp?
	Appreciate 1 Bmw doubles923.00 Quote

06-13-2019, 10:34 PM	#9
Bmw doubles Dream crusher 923 Rep 2,422 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	And we're off to the races. Attached Images __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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06-14-2019, 11:02 AM	#10
ziekxq Major 281 Rep 1,206 Posts Drives: 2011 535i xDrive Join Date: Feb 2016 Location: United States iTrader: (0)	I still wonder if this flows better than the n54 style hpfp.
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06-17-2019, 02:21 PM	#14
$howtime456 Major 260 Rep 1,017 Posts Drives: BMW 640i Join Date: Mar 2017 Location: NY iTrader: (0)	NICE!!! __________________ N55 GENERAL David Shoup FULL E85 Tuned- KEVIN BALDI TUNED-581hp VP Race Gas IG:1Badf06n55
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08-13-2019, 05:25 AM	#18
PepMo Private 13 Rep 74 Posts Drives: 2014 535i Join Date: Jul 2019 Location: CA iTrader: (0)	Sorry everyone, noob here. Anyone successfully run the XDI-60 pump on a BMW yet? I purchased the XDi-60 since May and still have not been able to get it to run correctly. I have an F10 535 PWG running BM3. At first install the car did not start even with the XDI60 checkbox marked in config. It took two weeks, but finally TTFS and BM3 was finally able to get the parameters right so the car is running now. However, it can't support 15+ PSI of boost without HPFP dropping to 800 PSi. TTFS are telling me that my Fuel-It Stage 2 pump is the problem now. My log is showing that the LPFP is at 84 PSI at any boost or RPM. I've read that the F10 does not have a low pressure fuel sensor so where is the BM3 getting this 84 PSI number from? If anyone have any theories, please chime in.
	Appreciate 0 Quote

08-13-2019, 01:58 PM	#21
bmw5sport Private 2 Rep 67 Posts Drives: 2013 BMW 535i Join Date: Oct 2018 Location: Virginia iTrader: (0)	Is the problem with the hpfp or the lpfp? I'm not getting codes for the lpfp.
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