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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 > Custom tune benefits vs OTS MHD stage 1+



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      02-28-2021, 11:42 AM   #1
bobbby
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Custom tune benefits vs OTS MHD stage 1+

2011 e90 n55 AT w/ the following mods -
Vrsf chargepipe
Mishimoto fmic
Xhp stage 3

This is my daily driver running mhd stage 1+ for the past year with no plans to get a downpipe due to being in LA and having to deal with smog. Also only going to use pump gas.

Anyone with experience with running a custom tune with just a fmic and chargepipe upgrade? Any thoughts on whether getting a custom tune would be worth it or should I just stick with the mhd ots stage 1+?
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      03-01-2021, 02:39 AM   #2
whyzee125
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Id get a custom tune for an e30 mix. That would yield some nice gains. Otherwise without a downpipe and on crappy CA gas there is only so much you can do.
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      03-01-2021, 02:05 PM   #3
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If you want to make more power you'll need higher octane to do it. If you're not willing to do the downpipe then I would just stay with what you're currently running.
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      03-01-2021, 06:31 PM   #4
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That's just stock plus FMIC with the worst gas in the US.
I wouldn't even run an OTS map. Factory map, or PPK at most.
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      03-02-2021, 09:19 PM   #5
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Thanks for the input guys. I thought as much - not willing to go through the trouble of doing an e30 mix.

Mhd 1+ runs fine tho so I guess that's pretty much all that there is to do. Curious if I'd be able to squeeze out a bit more performance and drivability through a custom tune.
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      03-03-2021, 11:06 AM   #6
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The drivability could be slightly different depending on the tuner you would choose. The power won't be noticeably different with your mods and octane. I would assume that you're having a handful of timing corrections on the OTS map so there wouldn't be much to gain by going custom.
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2019 Audi TT RS 11.0@125 92 Oct DS1 Tune | Intake | Turbo Inlet | Turbo Outlet | Downpipe | 980cc Injectors |
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