Quote:
Originally Posted by Turbod
Assuming you have a 2010 like your driver profile says then you have a N54 and this should be posted in the N54 section.
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It's a 2010 N55 DCT 135i.
Quote:
Originally Posted by Turbod
I would upgrade turbo before fueling. You will still be able to run the turbo or turbos (N54) on the stock fuel system. Which system you chose will determine if port injection on pump gas makes sense or not.
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Quote:
Originally Posted by WeekendWarriorz
If you want you could upgrade the fueling with port injection/fuel pump and try to absolutely max out the stock twins (n54), should be around 500whp and insane amount of torque on full e85 which would be cool before you change the turbo.
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So what seems to come out of your both posts is that no power gain is to expect (on stock turbo N55)...
At least the system would pay for itself quite quickly with the price difference between E85 and pump gas. Hard decision.