765whp Single Turbo E90 335i

N54 • 765whp • DOC Race Top Mount Single Turbo Kit (Pulsar 6766) • 6MT

335BYE_

Build Specifications

Engine

N54 ~ Alibaba Built Bottom End:

  • Kingtech Rods
  • Kingtech Pistons
  • ACL bearings
  • 11mm ARP Headstud
  • Pinned crank hub

Other Modifications:

  • Turbo smart BOV
  • VRSF Chargepipe
  • VRSF FMIC 7.5” Stepped HD
  • 3.5 bar TMAP Sensor
  • BMS Dual Oil Catch Can
  • 3.5” single Straight Pipe Exhaust

Turbo Setup

DOC Race Top Mount Single Turbo Kit

  • Pulsar 6766
  • Dual Dump
  • Dual Wastegate
  • 3.5 MAC Solenoid Wired to OE Boost solenoid

Fuel System

  • Speedsty Motorsports Dual Relay EKPM
  • Dual bucket less PR Stage 3.75 v2
  • Fuel labs 525 25-90 psi Pressure Regulator and Return Line
  • Motiv Reflex Plus, with ECA, and pressure sensor in pi rail
  • 950cc PR Injectors
  • Custom fuel line upgrades

Drivetrain

  • Auto Differential Pumpkin w/ MFactory LSD (3.46 final drive)
  • Motiv ST Full Face Twin Disc Clutch w/ Flywheel
  • Turner motor mounts 80A
  • 80A transmission mounts
  • OEM 6MT Swap

Brakes/Wheels Modifications:

  • 275x50x15 Mickey Thompson’s
  • AD-E Drag Brake kit (rear)
  • 15x10 Welds Rear wheels

Suspension

  • Strange Double Adjustable Drag Shocks
  • Fully reinforced subframe with all poly bushings in the subframe & differential
  • Fully adjustable SPL control arms in the rear (upper & lower)

About the Build

Built for both street and drag strip performance, this E90 335i is powered by a fully built N54 featuring a DOC Race top mount single turbo kit paired with a Pulsar 6766 turbocharger, putting down an impressive 765whp.

The setup combines serious horsepower with a factory 6MT manual swap, reinforced drivetrain components, and a thoroughly upgraded fuel system engineered to support high boost and ethanol performance reliably.

Fuel system upgrades include dual bucket-less pumps, Reflex-controlled port injection, upgraded injectors, custom fuel line upgrades, and a Speedsty Motorsports Dual Relay EKPM Kit configured to trigger the secondary pump at 25% pedal position for consistent fuel delivery under load.

The drivetrain and suspension setup were equally prioritized, featuring a Motiv twin disc clutch, MFactory LSD, reinforced rear subframe, SPL rear suspension components, and Strange double adjustable drag shocks. Weld rear wheels wrapped in Mickey Thompson drag radials help put the power down effectively.

Inside, the car maintains a focused motorsport-inspired interior with Sparco seating, harnesses, a CAE Ultra Shifter, and additional Hard Motorsport components throughout the cabin.

Owned by @335BYE_, this build is a perfect example of a well-rounded high horsepower N54 setup that balances drivability, reliability, and serious performance.

Speedsty Motorsports Products Installed

Speedsty Motorsports Dual Relay EKPM

Used in this 765whp N54 build to reliably trigger the secondary fuel pump under load.

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