RPM Tuning

2019 BMW Z4 20i (G29) – B48B20B

Engine Specs:
• 2.0L Turbocharged Inline-4
• Closed-Deck Aluminium Block
• Direct Injection
• Twin-Scroll Turbocharger
• Same B48 platform found in the G20 330i

Checked In For:
• RPM Custom Stage 1
• XHP Stage 3 Transmission Tune
• BMC Drop-In Air Filter

Stock BMW Claim:
🔹 197hp – 320Nm

Stock Actual Dyno:
🔹 190.2whp – 328Nm

RPM Custom Stage 1 Dyno:
🔹 260.7whp – 385Nm

Gains:
📈 +70whp
📈 +57Nm

2012 BMW 328i – N55 EWG Swap

What started life as an N20-powered 328i is now running a complete N55 EWG drivetrain from a 2015 BMW M235i.

We sourced and installed:
• N55 EWG Engine
• ECU
• Gearbox
• TCU
• Differential
• Complete supporting electronics

Mods:
• Catless Downpipe
• Armaspeed Cold-Air Intake
• Upgraded Intercooler
• Aluminium Charge Pipe & Boost Pipe
• NGK Iridium Spark Plugs
• Dinan Ignition Coils
• B58TU HPFP
• RPM Custom Stage 2
• XHP Custom TCU Tune

Original N20 Specs:
🔹 BMW Claim: 252hp – 350Nm
🔹 Actual Dyno: 220whp – 330Nm

N55 EWG Specs:
🔹 BMW Claim: 326hp – 450Nm

RPM Custom Stage 2 (Red):
🔹 355.3whp – 565Nm
(355.3whp – 57.6kgm)

RPM Custom Stage 2 + B58TU HPFP (Blue):
🔹 369.1whp – 617Nm
(369.1whp – 62.9kgm)

The factory N55 HPFP becomes a limitation once you start pushing boost and torque. By retrofitting the newer B58TU HPFP, we were able to increase fuel delivery capacity, eliminate fuel pressure concerns, and safely extract more power from the setup.

The result:
📈 +14whp
📈 +52Nm

Just from the HPFP upgrade alone + Proper Tuning.

2020 BMW X6 40i xDrive (G06) – B58B30C

Specs:
• 3.0L turbocharged inline-6
• xDrive AWD
• 8-speed ZF automatic

Mods:
• Catless Downpipe
• Full Valvetronic Exhaust System
• Dinan Cold-Air Intake
• ECU Unlock
• RPM Custom Stage 2
• XHP Stage 3 Transmission Tune

Stock BMW Claim:
340 hp – 450 Nm

Stock Actual:
373.4 whp – 504.2 Nm

RPM Custom Stage 2:
449.2 whp – 650.1 Nm

2025 BMW M340i | Gen 2 B58 (6-Port) - RPM Custom Stage 1+

Brand new car. Just 7,000 km on the dash.
BMW’s most tunable modern platform for a reason.

3.0L inline-6 turbocharged
6-port Gen 2 B58

Mods:
RPM Catless Downpipe with Heatshield
MST V2 Cold-Air Intake
AutoTuner ECU Unlock
XHP Stage 3 Transmission Tune

BMW factory claim:
386 hp | 500 Nm
Baseline on our dyno:
355 awhp | 540 Nm

RPM Custom Stage 1+:
470 hp | 750 Nm
419 awhp | 678 Nm at the wheels

This is why the Gen 2 B58 is so well respected.
Strong from factory, extremely responsive to tuning, and capable of big gains without pushing the hardware beyond its comfort zone.

2008 Porsche Cayenne GTS (957)

Engine Specs:
• 4.8L Naturally Aspirated V8
• Direct Injection
• AWD
• 6-Speed Tiptronic S
• Factory Claim: 405hp – 500Nm
• 0–100 km/h: 6.1 sec

Checked In For:
• RPM Stage 1

RPM Stage 1 Dyno:
🔹 326.9whp – 43.4kgm (425Nm)

Estimated Crank Power:
🔹 ~390–400hp – 510Nm

Overall improvements in Throttle response & Power.

For a naturally aspirated SUV that’s nearly two decades old, these are respectable numbers. The dyno suggests the engine is slightly down on power compared to factory figures, which isn’t surprising given the vehicle’s age and condition.

During inspection, we found the car requires:
• Top Overhaul
• Long Shaft Bushing Replacement

Before chasing more power, the priority is restoring the engine’s mechanical health. Once that’s sorted, we’ll have a better idea of how much performance is left in this 4.8L V8. 🔧🏁

2015 BMW 428i (F32) – N20 EWG

Engine Specs:
• 2.0L Turbocharged Inline-4
• TwinPower Turbo
• Direct Injection
• Electronic Wastegate (EWG)

Mods:
• Catless Downpipe
• Cold-Air Intake
• Aluminium Charge Pipe & Boost Pipe
• RPM Upgraded Intercooler

Stock BMW Claim:
🔹 245hp – 350Nm

Stock Actual:
🔹 220whp – 330Nm

RPM Custom Stage 2+ (RON95):
🔹 269whp – 427Nm
(268.9whp – 43.6kgm)

Estimated Crank Power:
🔹 ~310hp – 500Nm

With the supporting hardware installed, the N20 responds extremely well to tuning. The upgraded intercooler helps keep IATs under control, while the charge pipe and boost pipe eliminate one of the most common weak points on tuned N20s.

Safe AFR, smooth power delivery, and a strong torque curve all the way through the midrange. 🔥🏁

2016 BMW 330i (F30) – B48B20B

The first-generation B48 completely changed BMW’s 4-cylinder turbo game.

Engine Specs:
• 2.0L Turbocharged Inline-4
• Closed-Deck Aluminium Block
• Direct Injection
• Twin-Scroll Turbocharger
• Factory Output: 252hp / 350Nm

Mods:
• Catless Downpipe
• Exhaust System
• Cold-Air Intake
• Aluminium Chargepipe
• RPM Race Heat Exchanger
• Hybrid Turbo
• RPM Custom Stage 2+ Tune
• XHP Stage 3 Transmission Tune

Stock BMW Claim:
🔹 252hp / 350Nm

Stock Dyno:
🔹 230whp / 330Nm

RPM Stage 2+
🔹306whp / 469Nm

The upgraded heat exchanger helps keep intake temperatures under control, while the hybrid turbo continues making power where the factory turbo starts running out of breath.

A proper setup doesn’t just make more peak power. It makes power everywhere. 🔥🏁