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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 > More power out of my N55



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      07-05-2021, 02:21 PM   #1
Tony7141
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More power out of my N55

I have a 2011 BMW e92 335i and I was planning to push more power out of it. I was thinking about pushing it to stage 2 or stage 2+ on MHD. This is my current modifications at the moment.

BMS air intake
VRSF charge pipe
VRSF fmic
VRSF Down pipes

I am currently on MHD stage 1, which doesn't feel much of a difference from stock. My mileage is 106k but maintenance first, so stuff like valve cover, oil filter housing gaskets are good. In the whole cars lifetime, the HPFP hasn't been replaced and I have a inactive code for it on MHD but its still running and driving fine. I make sure I don't let the fuel tank drop more than 1/4 of a tank. I am about to replace my coil and plugs to delphi coils and oem plugs before I switch to MHD Stage 2.

Do you guys think I should be fine or have any other concerns?
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      07-05-2021, 02:37 PM   #2
whyzee125
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You'll be fine. If anything fails, it was already on its way out and being pushed harder just brought the weak link to the forefront. At 100k you're probably due for a walnut blasting as well. Other than that, keep an eye on the logs to make sure your HPFP is keeping up and enjoy!
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      07-05-2021, 07:27 PM   #3
Ozzie335i
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I don't believe walnut blasting is necessary with N55.
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      07-05-2021, 07:33 PM   #4
TunafishE93
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I would go with eldor coils and ngk one step cooler plugs... The code you are getting is not a tank fuel pump so fuel level is irrelevant unless empty... You car will go into limp mode once the HPFP is done which is giving you warning.. I would go with stock intake for more power also.
Other than that pray the bottom end holds up, this has nothing to do with tune but more to do with the long oil intervals and sub par bearings..
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      07-05-2021, 08:24 PM   #5
Tony7141
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Quote:
Originally Posted by TunafishE93 View Post
I would go with eldor coils and ngk one step cooler plugs... The code you are getting is not a tank fuel pump so fuel level is irrelevant unless empty... You car will go into limp mode once the HPFP is done which is giving you warning.. I would go with stock intake for more power also.
Other than that pray the bottom end holds up, this has nothing to do with tune but more to do with the long oil intervals and sub par bearings..
Sounds good, I am probably going to do oil intervals at 5k miles at most. I find that the 10k mile BMW intervals are way too long. My engine was rebuilt at 71k by BMW and cost the 3rd owner $22k in repairs from the dealer. The 3rd owner spun rod bearing #6. I bought the car from my local BMW dealership and I am currently the 4th owner at the moment.
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      07-05-2021, 09:15 PM   #6
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Nice that should give you some time..
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      07-06-2021, 09:17 AM   #7
anjuna
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Quote:
Originally Posted by Tony7141 View Post
I have a 2011 BMW e92 335i

BMS air intake
VRSF charge pipe
VRSF fmic
VRSF Down pipes

I am about to replace my coil and plugs to delphi coils and oem plugs before I switch to MHD Stage 2.

Do you guys think I should be fine or have any other concerns?
Don't expect a massively massive difference between 1 and 2, but there will be some. Not sure why you went with an air intake. Pointless at your power level.

Custom tune is where it's at tho.
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