top of page

BMW 20D TUNING GUIDE

BMW F Series 20d

The BMW F Series 20d comes with two different engines, the pre 2015 models generally have the N47 engine coming in two different power levels, the 163 BHP efficient dynamics and the 184 BHP version.  Both these engines are either attached to the 6 speed manual or 8 speed ZF8 automatic transmission.

 

N47 Engine

 

We have tuned in excess of 500 of these engines Stages 1 & 2, our extensive R & D on this platform has led us to be making industry leading power figures, fast real world performance whilst maintaining reliability.   

 

Stage 1 Tuning

 

Stage 1 tuning requires no mechanical modifications, typically we see these hitting 220- 225 BHP, 450 - 480 NM of torque.  Most people opt for Stage 1 Tuning as all the factory emissions system are left alone, the car remains MOT compliant and there are no visual modifications. 

 

Stage 2 Tuning

 

Stage 2  tuning requires removal of the DPF (Diesel Particulate Filter),   Stage 2 tuning typically we see 230 - 235 BHP, 480- 500 NM of torque.  Removal of the DPF will make the car smell like an old diesel and a small amount of visual smoke will be present. 

 

Gearbox Tuning ( Automatic only )

 

The ZF8 transmission is controlled by the Getrag TCU, whilst in stock format the box works well we can transform the box to behave in a much sportier fashion, improving shift points, shift times gear displays and adjustment of the maximum torque limiter.  These boxes are easily capable of reliably dealing with 600 Nm of torque. 

 

B47 Engine

 

Stage 1 Tuning

 

Stage 1 tuning requires no mechanical modifications, typically we see these hitting 225- 230 BHP, 470 - 500 NM of torque.  Most people opt for Stage 1 Tuning as all the factory emissions system are left alone, the car remains MOT compliant and there are no visual modifications. 

 

Stage 2 Tuning

 

Stage 2  tuning requires removal of the DPF (Diesel Particulate Filter),   Stage 2 tuning typically we see 230 - 240 BHP, 500- 520 NM of torque.  Removal of the DPF will make the car smell like an old diesel and a small amount of visual smoke will be present. 

 

Gearbox Tuning ( Automatic only )

 

The ZF8 transmission is controlled by the Getrag TCU, whilst in stock format the box works well we can transform the box to behave in a much sportier fashion, improving shift points, shift times gear displays and adjustment of the maximum torque limiter.  These boxes are easily capable of reliably dealing with 550 Nm of torque. 

 

Please see further details of gearbox tuning here

 

No matter what stage of tuning selected all cars are custom tuned on our mechanically linked (X drive safe) 4x4 rolling road.  BMW's X Drive system cannot be safely ran on a normal non linked rolling road and damage to the transfer box will result.  Whilst we see many companies unplugging transfer boxes or disabling the 4 x 4 system via software to run them on a two wheel drive dyno this is far from ideal and often results in massive over readings of torque.   

 

Before and tuning work commences your car is put on our rolling road, full diagnostics carried out and data logs  taken to establish the health of the vehicle. DPF regeneration and minor adaptions are all carried out before tuning where required at no additional cost.

bmw 335d x drive.jpg
319398977_3327730700806793_7046775888839940916_n.jpg

At DC Remapping, we are committed to providing the highest quality tuning services for all our customers. That's why we use the latest technology and equipment in the industry, such as the state-of-the-art V-tech 4WD Linked Dyno.

Our V-tech 4WD Linked Dyno is specifically designed to handle the most complex and demanding systems, including X-drive systems. This ensures that we can provide accurate and precise tuning for your vehicle, maximizing its performance and efficiency.

We understand that every vehicle is unique, and that's why we use the V-tech 4WD Linked Dyno which is X-drive safe, guaranteeing that your vehicle is in the best hands. Our team of expert tuners is dedicated to providing the best tuning services for all our customers, ensuring that you experience the full potential of your car's performance.

We invite you to experience the difference that our custom tuning services can make. Contact us today to book your appointment and see the improvements for yourself.

Stage 1 Custom Dyno Tuning £449.00inc vat

dyno graph of the bmw 320d x drive g21 after been stage 1 custom tuned.jpg

ZF8 Gearbox Tuning 

335d xDrive Sedan Stage 1

- Gear Display in all modes - Removed Torque Limiters

 

335d xDrive Sedan Stage 2

- Torque Limiter removed - Gear Display in all modes - Quicker, yet still comfortable shifts in D/Comfort - Revised, more Driver-Oriented Shift-Points in D/Comfort - Raised Launch-Control Shiftpoints for Tuned Cars - DTC and DSC-OFF modes no longer revert to Comfort-Shifting, but activate the fastest Shift-Speeds and the transmission won't upshift at redline in Manual. This is perfect for playing around with your car. - Retains full ECO-Pro functionality

 

335d xDrive Sedan Stage 3

- Factory Torque Limiter removed. This enables your Tuner to setup his engine tune correctly and prolong your transmissions life! - Gear Display in all modes - Raised Line Pressure for very High-Torque applications - Quicker, yet still comfortable shifts in D/Comfort - Even faster and harder shifts in Sport and Sport+ - Revised S-Shiftmaps to make it actually useful for spirited driving - Revised, more Driver-Oriented Shift-Points in D/Comfort - Torque Converter slip minimized in lower Gears - Raised Launch-Control Shiftpoints for Tuned Cars - DTC and DSC-OFF modes no longer revert to Comfort-Shifting, but activate the fastest Shift-Speeds and the transmission won't upshift at redline in Manual. This is perfect for playing around with your car. - Retains full ECO-Pro functionality

zf8_gearbox_tune_2.jpg
Who Are We
bottom of page