n55 injectors used on the n54?

Sniz · 10-18-2010, 08:22 PM

Steve Dinan was mentioning how the n55 uses the same HPFP at a lower psi but with larger injectors to compensate for the lower psi (in an attempt to save the HPFP)

soooo can the n55 injectors be fitted to the n54 for more fuel?

BrianMN · 10-18-2010, 09:03 PM

OOOHHHH you might be onto something!

jpsimon · 10-18-2010, 09:05 PM

I'll be pissed if this ends up being accurate, my car is getting new injectors installed tomorrow

BrianMN · 10-18-2010, 09:06 PM

Quote:

Originally Posted by jpsimon

I'll be pissed if this ends up being accurate, my car is getting new injectors installed tomorrow

Sounds like YOU can be the perfect guinea pig!?

scottp999 · 10-18-2010, 09:07 PM

Good post. I noticed the part numbers were different yesterday when we were making posts about his comments. Can we ask the resident BMW tech that visit's Clem's garage?

jpsimon · 10-18-2010, 09:10 PM

haha I'll leave that to someone else

Quote:

Originally Posted by BrianMN

Sounds like YOU can be the perfect guinea pig!?

Sniz · 10-18-2010, 09:23 PM

Quote:

Originally Posted by scottp999

Good post. I noticed the part numbers were different yesterday when we were making posts about his comments. Can we ask the resident BMW tech that visit's Clem's garage?

He wont know that one.

The injectors need to be programmed to the car correct?

wonder if they are able to do that......

oh the good days are gone, an injector was an injector. Any size fits if it literally...fits.

BrianMN · 10-18-2010, 09:27 PM

JP: Will you try to speak with a 'good' tech tomorrow about trying this?

jpsimon · 10-18-2010, 09:30 PM

I'm only getting one bank of injectors replaced, so I won't be doing this. If there are any techs around to ask about the n55 injectors fitting the n54 (and flowing more) i will, but can't promise that since i'm getting there at 745am to pick up my loaner and don't think the service department opens until 830

Sniz · 10-18-2010, 09:43 PM

Quote:

Originally Posted by jpsimon

I'm only getting one bank of injectors replaced, so I won't be doing this. If there are any techs around to ask about the n55 injectors fitting the n54 (and flowing more) i will, but can't promise that since i'm getting there at 745am to pick up my loaner and don't think the service department opens until 830

goodluck

I honestly wouldnt expect a BMW tech to be able to answer this question, they arent trained for that.

we need to see the specs for the n55 injector based upon fuel pressure.

jpsimon · 10-18-2010, 09:48 PM

yeah.. we just need someone to give it a whirl. i wish it could be me, but not this time

Quote:

Originally Posted by Sniz

goodluck

I honestly wouldnt expect a BMW tech to be able to answer this question, they arent trained for that.

we need to see the specs for the n55 injector based upon fuel pressure.

DefactoM6 · 10-18-2010, 10:05 PM

The person who will really be able to give specs on this injector based on bench testing will probably be the same person who has the ability to give us larger injectors and an upgraded HPFP...just saying.

Sniz · 10-19-2010, 07:10 AM

Quote:

Originally Posted by DefactoM6

The person who will really be able to give specs on this injector based on bench testing will probably be the same person who has the ability to give us larger injectors and an upgraded HPFP...just saying.

BMW has surely bench tested them

HPF has bench testing equipment for injectors as well

DefactoM6 · 10-19-2010, 07:42 AM

Quote:

Originally Posted by Sniz

BMW has surely bench tested them

HPF has bench testing equipment for injectors as well

One would hope that BMW did, given the delicate nature of programming them. :P And they surely have the aforementioned ability to upgrade, but they have no incentive to give us upgraded HPFPs and injectors when people will still try and warranty a motor popped from a bad tune.

If HPF put half the effort into the N54 that they've been putting into the S54, we would have a pretty foolproof fuel system by now at the very least, which would give everyone the incentive to start putting big singles on. I look at my engine bay and think about how much room there is for a top mount once the windshield washer bottle is relocated and vacuum tubes for the stock turbos are deleted.

scalbert · 10-19-2010, 08:17 AM

I really want to put a scope on the injector circuit to see what types of voltages these are being driven at. From there, bench testing would be easy.

enrita · 10-19-2010, 08:25 AM

would be great if we could upgrade to those easily (if they are bigger) . This would solve many issues.

scalbert · 10-19-2010, 08:42 AM

Doesn't look like it would work. The injectors are physically different:

N54

N55

cstavaru · 10-19-2010, 09:09 AM

Even if they would work, a comprehensive software rewrite would be needed in order to match the injector duty cycle with the pump pressure.

If they consider this a fix, BMW should give new HPFP + high-flow injectors + new software as a HPFP fix and be done with it

blisstik · 10-19-2010, 10:28 AM

This + class action.

Quote:

Originally Posted by cstavaru

Even if they would work, a comprehensive software rewrite would be needed in order to match the injector duty cycle with the pump pressure.

If they consider this a fix, BMW should give new HPFP + high-flow injectors + new software as a HPFP fix and be done with it

vasillalov · 10-19-2010, 10:47 AM

Quote:

Originally Posted by cstavaru

Even if they would work, a comprehensive software rewrite would be needed in order to match the injector duty cycle with the pump pressure.

If they consider this a fix, BMW should give new HPFP + high-flow injectors + new software as a HPFP fix and be done with it

BINGO! You can't just plug components left and right and pray they will work. Its not like swapping bumpers...

10-18-2010, 08:22 PM	#1
Sniz Lieutenant General 654 Rep 10,587 Posts Drives: e92 335 - gone // e36 M3 turbo Join Date: Mar 2007 Location: Ellicott City, MD iTrader: (1)	n55 injectors used on the n54? Steve Dinan was mentioning how the n55 uses the same HPFP at a lower psi but with larger injectors to compensate for the lower psi (in an attempt to save the HPFP) soooo can the n55 injectors be fitted to the n54 for more fuel? __________________
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10-18-2010, 09:03 PM	#2
BrianMN Banned 114 Rep 2,428 Posts Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis iTrader: (7)	OOOHHHH you might be onto something!
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10-18-2010, 09:05 PM	#3
jpsimon Team Zissou 3064 Rep 10,197 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	I'll be pissed if this ends up being accurate, my car is getting new injectors installed tomorrow
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10-18-2010, 09:07 PM	#5
scottp999 Brigadier General 133 Rep 4,764 Posts Drives: 4runner SR5 Join Date: Mar 2007 Location: MD iTrader: (2) Garage List 2007 BMW 335 [9.00]	Good post. I noticed the part numbers were different yesterday when we were making posts about his comments. Can we ask the resident BMW tech that visit's Clem's garage?
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10-18-2010, 09:27 PM	#8
BrianMN Banned 114 Rep 2,428 Posts Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis iTrader: (7)	JP: Will you try to speak with a 'good' tech tomorrow about trying this?
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10-18-2010, 09:30 PM	#9
jpsimon Team Zissou 3064 Rep 10,197 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	I'm only getting one bank of injectors replaced, so I won't be doing this. If there are any techs around to ask about the n55 injectors fitting the n54 (and flowing more) i will, but can't promise that since i'm getting there at 745am to pick up my loaner and don't think the service department opens until 830
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10-18-2010, 10:05 PM	#12
DefactoM6 Sees the world the way it could be 49 Rep 761 Posts Drives: '88 M6, '02 Z8, '09 E92 335i Join Date: May 2010 Location: CT iTrader: (11)	The person who will really be able to give specs on this injector based on bench testing will probably be the same person who has the ability to give us larger injectors and an upgraded HPFP...just saying. __________________
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10-19-2010, 08:17 AM	#15
scalbert Major General 153 Rep 5,780 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	I really want to put a scope on the injector circuit to see what types of voltages these are being driven at. From there, bench testing would be easy.
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10-19-2010, 08:25 AM	#16
enrita Major General 159 Rep 7,378 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	would be great if we could upgrade to those easily (if they are bigger) . This would solve many issues. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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10-19-2010, 08:42 AM	#17
scalbert Major General 153 Rep 5,780 Posts Drives: '13 S4, '15 Q7 Join Date: Feb 2007 Location: Woodstock, GA iTrader: (8)	Doesn't look like it would work. The injectors are physically different: N54 N55
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10-19-2010, 09:09 AM	#18
cstavaru Brigadier General 313 Rep 3,262 Posts Drives: 2009 335i M Sport Sedan 6MT Join Date: Aug 2008 Location: Bucharest, Romania iTrader: (0)	Even if they would work, a comprehensive software rewrite would be needed in order to match the injector duty cycle with the pump pressure. If they consider this a fix, BMW should give new HPFP + high-flow injectors + new software as a HPFP fix and be done with it __________________ Mods(click): Cobb + RB Turbos \| Aquamist HFS-4 Meth \| Drexler LSD \| Bilstein B12 Pro-Kit \| Custom K&N Apollo Intake \| Wagner Intercooler \| Macht Schnell Downpipes \| BMW Performance Power Kit \| BMW Performance Exhaust \| BMW Performance Short Shifter \| M3 Subframe Bushings \|
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