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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Fueling Upgrade



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      01-08-2024, 11:27 PM   #1
Ssanders
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Fueling Upgrade

About to go for a set of 19t turbos for 09 335xi (n54) what fueling upgrades do i need to push 550-600whp on some e85 blend or just straight e85
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      01-09-2024, 01:40 PM   #2
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Following along.
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      01-09-2024, 11:12 PM   #3
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in case ur wondering, unles someone posts something completely contradictory, i’ve decided to go stage 2 lpfp and stock hpfp until it or the ebay turbos fail and then i’ll go port injection
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      01-09-2024, 11:13 PM   #4
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with an e40ish mix
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      01-09-2024, 11:40 PM   #5
335i54n
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imo you need port, stage 3 and an lsd. i wouldnt cheap out on fueling and even stock lsd is helpful

https://bmwtuning.co/bmw-n54-fueling-mods-guide/

Last edited by 335i54n; 01-10-2024 at 05:25 PM..
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      01-10-2024, 09:10 AM   #6
oVeRdOsE.
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Quote:
Originally Posted by 335i54n View Post
imo you need port, stage 3 and an lsd
for 550whp ? not sure...

Stage 2 walbro 450 or 550lph with a cooling mod on the EKP, should be enough. Also the DIY guide is pretty easy, and this mod is cheap.

if you street tune with MHD or JB4, Ill check what would be the limit with a stage 2, and then evaluate if a stage 3 is needed. More work, more failure point since it need a relay and a signal.

port injection or meth is always a good idea on a n54 in that HP range.
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      01-10-2024, 10:42 AM   #7
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Walboro 450 and some meth. Port injection if you're going for 100% E85 since your HPFP will crap out. LSD isn't needed if youre keeping your tq under 600 IMO, so contact your tuner.
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