This stunning M140i is no stranger to NVM HQ as it has previously been in for Stage 2 Tuning  and Aluminium Charge Pipes and a BMS Billet Intake, making 450Bhp and 640Nm Torque. But the customer wanted more…

The HPFP was a limiting factor in the previous tune and so a Dorch Engineering Stage 1 upgrade was needed, paired with the NVM Meth injection kit for better cooling.

The Dorch High Pressure Fuel pump is a complete unit, which replaces the OEM HPFP, new hard lines and braided line that is e85 compatible and The NVM Meth injection kit comprises of the Burger Motorsport Meth Injection Kit with BM7 Nozzle and Solenoid, our Snow Performance Digital Progressive Meth Controller, NVM Tank and Bracket.

The Solenoid is placed under the scuttle panel and the lines run through to the back through the inside sill.

The Nylon line is ran from pre-throttle body to the charge pipe, and a boost vacuum line straight to the gauge.

The Tank is situated in the boot on the right hand side for a 5-door variant.

The 200psi pump is mounted into the boot floor to provide a nice neat install.

The VC50 upgrade is installed into the Dash for ease of view and digital adjustments.

Thats the Meth installed, now to install the Dorch Stage 1 HPFP.

The Piston Diameter is slightly bigger so whatever fuel goes in gets compressed to create a greater fuel pressure, it comes with a spacer and a 3D printed alignment tool so that the spacer can be bolted on first and then the pump fitted to the spacer after.

On all direct injection vehicles there is a low pressure fuel pump in the fuel tank and a high pressure fuel pump that regulates off the exhaust cam to build fuel pressure.

The car is ran on its original Stage 2 Map after part fitting running 442BHP and 590Nm Torque, with the fuel pump causing over fuelling before it has been tuned in, causing less peak in torque and power. The torque limiters in 3rd and 6th gear were lifted and overall limiters in general and quicker shifts are applied to allow for the gearbox to run consecutively above 6ooNm Torque.

After a few hours of dyno calibrating and meth bottles, we managed to push: 488 Bhp and 688 Nm.