[byebyev8]

Which turbo's perform better? seems like the n63tu turbos flow well enough for 600whp.

[warpeacelove]

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.

[warpeacelove]

Originally Posted by byebyev8

Which turbo's perform better? seems like the n63tu turbos flow well enough for 600whp.

Turbos aren't the same.

[747flyboy]

compare part numbers and schematics on realoem.com

[addy27]

Not having diverted valves makes n63tu not applicable for N63. However, the Alpina Turbos all have diverted/blowoff valves. The older Alpina Turbos based on the n63 platform should be a direct swap.

[535_BiTurbo]

Originally Posted by 747flyboy

compare part numbers and schematics on realoem.com

Are the turbos the same?

[badblack550xi]

Originally Posted by 535_BiTurbo

Are the turbos the same?

Alpina turbos are not the same they are way better

[warpeacelove]

Originally Posted by badblack550xi

Alpina turbos are not the same they are way better

from where and what model year etc?

[535_BiTurbo]

Originally Posted by badblack550xi

Alpina turbos are not the same they are way better

That's what I was thinking too

[byebyev8]

I just figured since bms dynoed 600whp with the n63tu turbo's and the highest dyno ive seen from the alpina's was around 570whp. I do realize the n63tu has alot of other upgrades over the n63 that also contributed to the 600whp dyno.

[535_BiTurbo]

N63 is tuning limited