N54 engine question

E90PAT · 12-19-2009, 01:44 PM

Just a couple of questions

Does the n54 have a valve management arraignment? like the n52?

Are the camshafts connected straight from main shaft via chains?

Is their a system the controls the length of the valves opening from idle to full throttle?

bsamoul · 12-19-2009, 01:46 PM

are you talking about the VANOS system?

E90PAT · 12-19-2009, 01:52 PM

Quote:

Originally Posted by bsamoul

are you talking about the VANOS system?

I believe so. If thats the system that controls valve lift, then, yes.

D.yi · 12-19-2009, 02:10 PM

then yes the ns4 has vanos

bsamoul · 12-19-2009, 02:50 PM

http://www.usautoparts.net/bmw/technology/vanos.htm

piezo · 12-19-2009, 08:48 PM

VANOS adjusts valve advance (timing), not lift

N52 also has Valvetronic, which adjusts valve lift in lieu of the traditional throttle plate (used only during "limp home" mode)

http://www.e90post.com/forums/showthread.php?t=38856

Now what I'd like explained, is that the N54's lack of Valvetronic was spun at the time as its' being unnecessary on a forced induction motor. Now they've gone and slapped it onto the N55. If the point of switching to a single twin-scroll turbo was reduced cost and complexity, it seems to me as if Valvetronic adds it right back in the name of incrementally better fuel consumption, and thus of course emissions.

12-19-2009, 01:44 PM	#1
E90PAT SOFLO CODING 199 Rep 3,587 Posts Drives: Z4M Join Date: Apr 2009 Location: SoFla iTrader: (18)	N54 engine question Just a couple of questions Does the n54 have a valve management arraignment? like the n52? Are the camshafts connected straight from main shaft via chains? Is their a system the controls the length of the valves opening from idle to full throttle?
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12-19-2009, 01:46 PM	#2
bsamoul Major General 167 Rep 7,433 Posts Drives: E90 325i Join Date: Feb 2007 Location: Walnut Creek, California iTrader: (2)	are you talking about the VANOS system? __________________ -Brian 2X 2006 BMW 325i [Electric Red & Mystic Blue] \| ZPP \| V1 \| Rear Fogs \| M3 Lip Spoiler \| EAS RemoteKey \| BMS Powerbox \| Projector90 Headlights w/ LED AE \| LED plate lights \| OEM Blacklines http://www.tech-shine.com
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12-19-2009, 02:10 PM	#4
D.yi Major 52 Rep 1,216 Posts Drives: SB e92 335i Join Date: Oct 2009 Location: SEATTLE iTrader: (0)	then yes the ns4 has vanos
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12-19-2009, 02:50 PM	#5
bsamoul Major General 167 Rep 7,433 Posts Drives: E90 325i Join Date: Feb 2007 Location: Walnut Creek, California iTrader: (2)	http://www.usautoparts.net/bmw/technology/vanos.htm __________________ -Brian 2X 2006 BMW 325i [Electric Red & Mystic Blue] \| ZPP \| V1 \| Rear Fogs \| M3 Lip Spoiler \| EAS RemoteKey \| BMS Powerbox \| Projector90 Headlights w/ LED AE \| LED plate lights \| OEM Blacklines http://www.tech-shine.com
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12-19-2009, 08:48 PM	#6
piezo unstratified 1 Rep 162 Posts Drives: '07 335i Coupe Join Date: Feb 2007 Location: New England iTrader: (0)	VANOS adjusts valve advance (timing), not lift N52 also has Valvetronic, which adjusts valve lift in lieu of the traditional throttle plate (used only during "limp home" mode) http://www.e90post.com/forums/showthread.php?t=38856 Now what I'd like explained, is that the N54's lack of Valvetronic was spun at the time as its' being unnecessary on a forced induction motor. Now they've gone and slapped it onto the N55. If the point of switching to a single twin-scroll turbo was reduced cost and complexity, it seems to me as if Valvetronic adds it right back in the name of incrementally better fuel consumption, and thus of course emissions.
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