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      03-13-2016, 02:43 PM   #1
buly34
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Smile 335xi RB Turbo Upgrade Preparation

My 335xi is at 136k and the Turbos (OEM) are about ready to get replaced. I'm planning on doing the job sometime in the next few months, but need some advice. Here are the current mods on my car...

- VRSF Catless Downpipes
- Muffler Delete
- Performance Coils + New Plugs
- BMS Cone Intakes
- BMS Charge Pipe
- HKS Blow Off Valve
- Stage 4 Clutch Masters Clutch + Aluminum Flywheel
- New VANOS Solenoids
- New CPS Sensors
- Walnut Media Blasting
- New Valve Cover Gasket
- New Vacuum Lines
- Open Source Tune @ 16.5psi

My question is along with the RB Turbo Upgrade, what else needs to be upgraded? From what I have read/heard internally the N54 can handle the power. I am more worried about transferring the power to the ground. So far this is what I plan to get...

- Upgraded FMIC
- Upgraded Oil Cooler
- Upgraded HPFP System (I think mine is starting to die)

Please let me know what else needs to be done, I wanna get all the parts ordered and do all the work at once. (I plan to pull the motor)

Thanks in Advance!
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2007 E90 335xi | ---WHP // ---TQ >> New Turbos, Numbers Coming Soon!
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      03-13-2016, 03:05 PM   #2
Kevinl
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What type of fuel are you running
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      03-13-2016, 03:06 PM   #3
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Waterpump, thermostat, oil pan gasket, oil level sensor gasket, oil pan bolt set.
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      03-13-2016, 09:14 PM   #4
buly34
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Quote:
Originally Posted by Kevinl View Post
What type of fuel are you running
Just 93 Pump Gas, might use higher octane if I do track days.

Quote:
Originally Posted by dawhiz View Post
Waterpump, thermostat, oil pan gasket, oil level sensor gasket, oil pan bolt set.
Anything related to transferring the power to the ground?
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      03-17-2016, 11:46 AM   #5
335TWNTURBO
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LSD? It will definitely distribute the power equally to both wheels.
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      03-17-2016, 12:25 PM   #6
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Originally Posted by 335TWNTURBO View Post
LSD? It will definitely distribute the power equally to both wheels.
Didnt know there is LSD for xi model
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      03-17-2016, 12:35 PM   #7
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Quote:
Originally Posted by jonluc88 View Post
Didnt know there is LSD for xi model
Me neither, unless he is thinking I have a 335i...
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      03-17-2016, 02:55 PM   #8
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Quote:
Originally Posted by buly34 View Post
My 335xi is at 136k and the Turbos (OEM) are about ready to get replaced. I'm planning on doing the job sometime in the next few months, but need some advice. Here are the current mods on my car...

- VRSF Catless Downpipes
- Muffler Delete
- Performance Coils + New Plugs
- BMS Cone Intakes
- BMS Charge Pipe
- HKS Blow Off Valve
- Stage 4 Clutch Masters Clutch + Aluminum Flywheel
- New VANOS Solenoids
- New CPS Sensors
- Walnut Media Blasting
- New Valve Cover Gasket
- New Vacuum Lines
- Open Source Tune @ 16.5psi

My question is along with the RB Turbo Upgrade, what else needs to be upgraded? From what I have read/heard internally the N54 can handle the power. I am more worried about transferring the power to the ground. So far this is what I plan to get...

- Upgraded FMIC
- Upgraded Oil Cooler
- Upgraded HPFP System (I think mine is starting to die)

Please let me know what else needs to be done, I wanna get all the parts ordered and do all the work at once. (I plan to pull the motor)

Thanks in Advance!
What about new vacuum lines (especially the hard to reach areas)?
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      03-17-2016, 03:30 PM   #9
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What about new vacuum lines (especially the hard to reach areas)?
OP listed new vacuum lines.
Good list so far. Did you go with colder spark plugs?
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      03-17-2016, 03:58 PM   #10
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Make sure to get a quality FMIC, you are going to be pushing a lot of boost
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      03-17-2016, 04:17 PM   #11
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Quote:
Originally Posted by TheGailWay View Post
OP listed new vacuum lines.
Good list so far. Did you go with colder spark plugs?
I just got NGK because of how the Bosch are designed they can't be re-gapped.


Quote:
Originally Posted by mike@x-ph.com View Post
Make sure to get a quality FMIC, you are going to be pushing a lot of boost
I plan to upgrade buy it will depend how much boost I end up making.

UPDATE: As of now my turbos are rattling like crazy and smoke is starting to appear

I think RB's are going to be out of my price range at this point, and everything else seems to be untrustworthy. May just get OEM replacements
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      03-17-2016, 04:24 PM   #12
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Quote:
Originally Posted by buly34 View Post
I just got NGK because of how the Bosch are designed they can't be re-gapped.




I plan to upgrade buy it will depend how much boost I end up making.

UPDATE: As of now my turbos are rattling like crazy and smoke is starting to appear

I think RB's are going to be out of my price range at this point, and everything else seems to be untrustworthy. May just get OEM replacements
Mine are now starting to get a little rattly sounding at 108k miles. I guess I need to start saving my pennies or start planning to get into a newer CPO M3/M4
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      03-17-2016, 04:28 PM   #13
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Quote:
Originally Posted by buly34 View Post
I just got NGK because of how the Bosch are designed they can't be re-gapped.




I plan to upgrade buy it will depend how much boost I end up making.

UPDATE: As of now my turbos are rattling like crazy and smoke is starting to appear

I think RB's are going to be out of my price range at this point, and everything else seems to be untrustworthy. May just get OEM replacements



With the right mods you can make serious power with stock turbos
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      03-17-2016, 04:48 PM   #14
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I made about 350WHP/380WTQ on the stocks at 13.5/14 PSI. I think I lost power due to the poor performing turbos. Hoping that I can run about 18-19 on the fresh OEM's and make much more.
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