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  #35  
Old 11-13-2012, 04:58 AM
agraham2252 agraham2252 is offline
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Location: NM
 
Join Date: Jul 2012
Posts: 22
Mein Auto: 330xi
Just a late note on this tread. The website now lists the difference between the 550i and 550GT engine.

550i

4.4-liter BMW TwinPower Turbo V-8, 32-valve 400-hp engine. Combines two turbochargers with variable valve control (Double-VANOS and Valvetronic) and high-precision direct injection

550GT

4.4-liter, 32-valve 445-hp V-8 engine with TwinPower Turbo technology, piezo direct fuel injection, 4 overhead camshafts, and Double-VANOS steplessly variable valve timing

I guess that I am confused. How many camshafts does the N63 have? Would the piezo direct fuel injection have that much effect?
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