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      03-13-2015, 03:07 PM   #1
waterborn0
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Differences between N63 and N63tu

Does anyone know the specific differences between the N63 and N63tu engines used in the 750 F01/02?

I wonder if it the changes are merely simple upgrades such as higher performance fuel injectors, coils, and plugs..

I would like to increase my MPG and think fuel efficiency may be the simple path.
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      03-13-2015, 05:14 PM   #2
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Its way more than that. Virtually the whole motor was overhauled, from the bottom up.

The economy difference has nothing to do with the motor itself. When the TU was introduced, so was the 8 speed, and thats where any economy difference comes from.
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      03-13-2015, 06:00 PM   #3
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Do you know the specific changes? Overhauling top to bottom is a bit vague.
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      03-13-2015, 06:22 PM   #4
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They share very few part numbers. The most important things are the addition of Valvetronic variable lift, new heads, and new turbos
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      03-13-2015, 08:27 PM   #5
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Not sharing the same part numbers is exactly the info that I am seeking, although I need the specifics. It doesn't sound like you have that info.

I was hoping someone had already done the analysis but I guess not. Time to do some work.
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      03-13-2015, 08:34 PM   #6
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Quote:
Originally Posted by waterborn0 View Post
Not sharing the same part numbers is exactly the info that I am seeking, although I need the specifics. It doesn't sound like you have that info.

I was hoping someone had already done the analysis but I guess not. Time to do some work.
I have all the info, because I have ETK access. I'm not about to go through the motor part by part though.
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      03-13-2015, 08:41 PM   #7
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Okay. Good for you which does nothing for me or anyone else seeking to improve fuel efficiency. As I said, I was hoping that someone had performed the analysis for the differences and what the impact might be be.
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      03-13-2015, 08:42 PM   #8
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There is no efficiency to be had. You're driving a $100k car. It is what it is.
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      03-13-2015, 08:45 PM   #9
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that is your unbridled opinion. I feel there always room for improvement.
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      03-15-2015, 08:38 AM   #10
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Quote:
Originally Posted by waterborn0 View Post
Do you know the specific changes? Overhauling top to bottom is a bit vague.
N63TU differences
Quote:
Engine mechanical
• New cylinder head due to use of the Turbo Valvetronic Direct Injection (TVDI) procedure
• 3rd generation Valvetronic
• New valvetrain with modified timing
• Adoption of VANOS from the N55 engine
• New cylinder head cover with adapted crankcase ventilation
• Pistons with modified piston crown geometry
• New connecting rod with even pitch and adaptation of the crankcase due to modified connecting rod shape
• Adapted crankshaft
• Chain drive with modified guide rails and an extruded chain with 142 elements.

Oil supply
• Pendulum slide cell pump with small overall width
• Eight individual oil spray nozzles for piston crown cooling.

Cooling
• Integration of the two engine control units in the low-temperature circuit and cooling over the back panel with cooling pipe
• Expansion tank under the left side wall with separate filling hopper.

Intake and exhaust emission systems
• Adaptation of the manifold for the air intake duct due to new geometry of the cylinder head cover
• Use of the hot film air mass meter 7
• Adoption of the charge air temperature and intake-manifold pressure sensor from the N20 engine
• Exhaust turbocharger with new compressor and modified wastegate valves
• Discontinuation of the blow-off valves.

Vacuum system
• Two-stage vacuum pump with new arrangement of the bolt connection
• Vacuum reservoir for the wastegate valves in the V-area of the engine.

Fuel preparation
• Use of the known high-pressure injection with injectors and high pressure pump HDP5
• Discontinuation of fuel low-pressure sensor

Engine management system
• New dual control unit concept with one control unit per bank
• Oil level sensor with an additional temperature sensor in the main oil duct behind the starter motor.
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      03-15-2015, 04:52 PM   #11
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Thanks, that was helpful...
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      03-16-2015, 03:26 PM   #12
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Quote:
Originally Posted by waterborn0 View Post
Thanks, that was helpful...
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      11-14-2015, 03:44 PM   #13
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Quote:
Originally Posted by E90Fleet View Post
N63TU differences
http://www.topspeed.com/cars/car-new...6918.html#main

The N63TU is rated at 445 hp and 480 lb-ft of torque.
The N63T is rated at 400 hp and 450 lb-ft of torque.

F01 and F02 (7 Series Sedan) BMW equipped with the earlier N63(T) engines were produced from 3/2009 to 6/2012.
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      11-16-2015, 12:40 AM   #14
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When exactly was this N63(TU) implemented? And was the 8 speed tyranny included?
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