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Old 11-14-2012, 01:59 PM
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Stealth.Pilot Stealth.Pilot is offline
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Quote:
Originally Posted by agraham2252 View Post
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?
I think there could be one of 2 explanations:
1) the 550i engine is identical but detuned.
2) the 550i does not have twin scroll turbo chargers.
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