Quote:
Originally Posted by nicknick
From what i havevread on the net (bitog) direct injection ,while increasing power etc, really causes problems like very dirty engine internals. there was Porsche Cayenne v8 engine that looked like it was dead due to the amount of carbon buildup and it also affects Audis too. So I am not too upset that Nissan did not offer this new tech. Maybe it needs more work before Nissan will use it.
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carbon buildup is a known problem for all DI engines (porsche, bmw, audi, vw...), but for some reason it doesn't happen to all of them. obviously it didn't stop nissan form putting DI into G37. i guess the power gain and better fuel economy/emission justify the number of potential engines they have to clean out. hopefully they'll have a fix by the time nissan puts it in Z
