The SYNERGY 2 TUNING MODULE  is the complete solution for performance enhancement of your  Rover 75, MG ZT, Freelander TD4 & BMW diesel at under half the price of most basic tuning boxes.

* available from my online shop for £71.75 [A Bosch one costs over £220 or £250+ if dealer fitted. If its less, it won't be a genuine Bosch one]

Owner feedback:

Owners comments on the 75 and ZT club forum click here

Hi Ron, just fitted synergy to my 116hp Rover 75 Tourer, in a word stunning, I can't believe the difference. I have got the box set on no5 at the moment and the pull from low revs is amazing, it had nothing below 2000rpm before. It is without shadow of  a doubt the best £195:00 I have ever spent on a car. I have just bought the Rover to replace my Volvo V70 and was so disappointed with the performance I thought of reselling it. Now it's brilliant, many thanks,   Simon 

BRIEF SPECS 

1. TUNING SECTION:  MORE ON THE SYNERGY 1 PAGE HERE

• POWER BOOSTED FROM 111BHP TO 144* BHP @ 4000RPM on my Rover 75CDT. (flywheel bhp corrected to Din 70020) *150BHP WITH EGR BYPASS & DECAT

• POWER BOOSTED FROM 135BHP TO OVER 155 BHP @ 3500RPM on an owners ZT135 (corrected flywheel bhp)

• 95% of MAXIMUM TORQUE FROM 1900 - 3500rpm*

• 40% MORE TORQUE AT 2000RPM

• 45-50% MORE BHP AT 4000rpm*

• 5 SETTINGS   

• BYPASS SWITCH. (2nd from right in photo)

• PLUGS STRAIGHT IN  - IN MINUTES WITH NO WIRES TO CUT OR JOIN

2. DIGITAL MAFAM SECTION MORE ON THE MF75 MAFAM PAGE HERE

• DEVELOPED FROM THE HIGHLY EFFECTIVE MAFAM MF75 & MF1P

• DIGITALLY REMAPS THE MAF SENSOR SIGNAL IN REAL TIME

• 2 SETTINGS TO COVER VARIOUS DEGREES OF DETERIORATION

• SEPARATE BYPASS SWITCH (far right in the photo)

• PLUGS STRAIGHT IN  - IN MINUTES WITH NO WIRES TO CUT OR JOIN

• ENABLES THE CHEAPER PIERBUGH MAF SENSOR TO BE FITTED IF YOUR MAF SENSOR IS COMPLETELY DEAD, SAVING YOU OVER £160 

3. OPTIONAL DASH SWITCH

• PLUGS INTO THE SOCKET ON THE BOTTOM OF THE TU4 (visible opposite)

• COMPACT SWITCH MODULE ATTACHES WITH VELCRO SO NO HOLES TO DRILL

• HAS OFF, ECONOMY/URBAN AND NORMAL/FAST ROAD POWER SETTINGS...... 

•  

• LOW:   NORMAL THROTTLE RESPONSE BUT WITH POWER WHEN YOU PRESS THE PEDAL BEYOND 3/4 TRAVEL.

• OFF:    TUNING SECTION OFF, MAF SECTION ON

• HIGH:   USES WHATEVER THE SWITCH ON THE MODULE IS SET TO. SET TO A HIGH SETTING FOR OPEN ROAD USE

NO OTHER COMMON RAIL TUNING MODULE GIVES YOU ALL THESE FEATURES AT ANY PRICE 

DESIGN AIMS & RECOMMENDATIONS.   

The Synergy 2 connects to both the Maf sensor and fuel pressure sensor in the same way as the Synergy 1 and MF75p but all signal processing is done in the digital domain. Thus it replaces the separate Synergy 1 and Mafam modules though these are still available separately or as a package for owners who want to keep the two functions separate.  

Theses charts from 2005 show the BHP and Torque of my 75CDT in standard form (yellow line) and with Synergy module fitted.

The Synergy 2 is shown with just the mafam section (Dark blue line) and with the Tu3 section switched on as well. (Setting 6) Purple line.

You can clearly see the effect of the mafam section on low down torque - the turbo comes in from 1600rpm and the torque is boosted significantly between 1600 and 2250rpm. The effects of the intake mod and Pierburgh maf are probably responsible for the higher revving ability.

THE CONTROLS

The separate switches mean that either section can be bypassed. The rotary control has 10 positions but its easy to find the right one - see table below.

First  you determine the best mafam setting with the tuning section switched out.

The majority of engines with over 40k miles will show some maf sensor deterioration and this will be affecting the performance and driveability below 2000rpm. Sometimes the loss is quite small and you may not even be aware of it. 

You should be able to pull away using no more than 1000rpm and accelerate smoothly and linearly without any hesitation or delay before the car pickups. If not - your maf sensor is responsible. Trying to get any sense out of a dealer is often fruitless because maf degradation never shows up on diagnostic tests and any query about lack lustre low down performance is usually met with a "they're all like that sir" reply...!

"It never ceases to disappoint me that many dealers seem (or pretend?) to be blissfully unaware of this well known maf issue"

Only when you have driven a Rover, MG or Freelander diesel with the optimum maf signal, will you realise what you have been missing.  Many owners come very close to selling their car due to frustratingly poor performance below 2000rpm, only to rapidly change their minds once a Synergy 2 has been fitted.

Please visit my 75 Maf page here to find out how to decide whether your maf is faulty.

If you find that no improvement is felt using the mafam section, it can be left switched off or even disconnected until required.

SWITCH SETTINGS FOR THE 2009 ONWARD MODEL: 

MPG UPDATE. 27-08-06

I have now had a Synergy 2 + Pierburgh maf, installed for 6months and my intake mod done for about 2 months. On my daily 12mile round trips to the Post Office  (max speed 60, numerous 30mph bends and a steep hill) I average 44-45 mpg based on fuel actually used. I drive 'briskly' and make no attempt at saving fuel, but only use max power for overtaking.

On longer runs sticking to the speed limit + 10% (or so!) and making 'good progress' with plenty of overtaking, I get around 49-50mpg.

Generally speaking, I avoid large throttle openings below 1500rpm, don't change down until the tacho reads 1100rpm on the level and 1250rpm on hills, the aircon is not often used, or only for short periods. (we are talking Perthshire UK, not Perth Australia!)

I always add Millers Diesel Plus to the fuel.

Many  Synergy 2 owners have reported improved mpg.

FUEL ECONOMY COMMENTS

Neither the Synergy 1 nor 2 will adversely affect the fuel consumption and in most cases will improve it depending upon how you drive. Equally, if your mpg is below average, neither will effect a total cure because there are 4 vital components that also affect it.

1) Maf sensor   2) EGR valve  3) PCV valve 4) Leaking intercooler seals.

If you feel your car is using more fuel that it should, please try and find out if this is actually the case* and what the cause is. I don't advise fitting any tuning product purely to improve the mpg and would never make such claims even though many owners have reported improved mpg.

*The Tourer and automatic models use significantly more than the saloon. The aircon can also make a substantial difference, especially in hot weather. Also check the tyre pressures and for uneven tyre wear that indicates the tracking needs checking. A few new owners possibly expect better mpg than is achievable, particularly if using their car for frequent short journeys or much urban driving. Its a heavy , solidly built car! Mpg will drop by a few mpg in cold weather.