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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 E40 or E50 Custom Tune



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      10-09-2017, 04:55 PM   #1
victorg95
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N55 E40 or E50 Custom Tune

Just got my fuel it stage 2 lpfp installed today and looking to get a custom tune this week, confused on what mix to go with. Whether i go for e40 or e50. im worried about misfiring with e50 but i feel like i would get more power,

Anyone with input, opinions, anything, help me out and tell me which would be better.

Thanks guys!
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      10-09-2017, 06:46 PM   #2
Aseneph
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Quote:
Originally Posted by victorg95 View Post
Just got my fuel it stage 2 lpfp installed today and looking to get a custom tune this week, confused on what mix to go with. Whether i go for e40 or e50. im worried about misfiring with e50 but i feel like i would get more power,

Anyone with input, opinions, anything, help me out and tell me which would be better.

Thanks guys!
Go PI and straight e85
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      10-09-2017, 07:37 PM   #3
Kevin39
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Stock turbo right? Assuming the HPFP holds up, E40 would probably be enough to max out the turbo. I'd talk to the tuner though.
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