Remap For w209 200 Kompressor

[Old Jock]

Does anyone know if remapping the 163bhp ecu is worthwhile? Is it simply an ecu remap which gave the later C200 Kompressor 184bhp or is there more involved? I’m more interested in improving the mpg as the car is my daily driver but most adverts claim to improve both bhp and mpg. Is it possible to remap for economy and retain the current level of performance which is ok but I have to admit that I miss the torque of my previous car which was a 2.7 litre twin turbo diesel Jaguar S Type XS.

 

[sonic]

We had a 2004 SLK200K with the 163BHP engine, replaced it with a 2010 SLK200K with the 184BHP engine.
The 163BHP engine was a little more economic 2-3 MPG, cant say I noticed any difference in performance.
I don't know how they achieved the extra BHP.
We now have a SLC250d 201BHP, quicker & much better fuel consumption.

 

[Old Jock]

Hello Sonic,
Thanks for your reply. I’ve spoken with one of the local engine tuners and he has advised that remapping the ecu will give more power and torque but the mpg figure is unlikely to improve much although it should remain more or less the same if the car is driven the same. He suggested a bhp increase to around 195/7bhp and an extra 34/37 ftlbs would result from what he called a stage 1 remap. I’m not sure I want to pay £250+vat for power I may never use.

 

[Gazwould]

It's not like that it also gives you more lower rpm torque that comes in stronger and makes the car easier to drive everyday .

 

[Old Jock]

Hi Gazwould,
Thanks for your reply. Do you have experience of driving a remapped car with a petrol engine? Can you feel a difference, is it more responsive for instance? Did the fuel economy get better, get worse or stay the same? I know that Diesel engines have a significant improvement on all counts because they use direct injection systems which allows the control of the fuel to air ratio for each cylinder to be more precise rather than a common rail system which I believe my car has. Any knowledge you wish to share will be appreciated.

 

[Gazwould]

Yes I've a Stage 1a S14 .

 

[Old Jock]

Hi Gazwould,
Thanks once again for your help. Was the remap worth doing and why, did the mpg improve? I’m sorry to have to ask again but I’m just trying to get some accurate information on which to base a decision and you are the only person with experience who has been kind enough to reply to my call for help. If you don’t want to make it public a private message would be great.

 

[Gazwould]

This was basically Stage 2 keeping std turbo , with supporting mods of uprated turbo actuator , free flowing air filter , 3" exhaust and fmic , gained around 100 bhp and 100 lbft , quite lively as kerb weight is 1275 kg .

Mpg unchanged which is the norm .

 

[Old Jock]

Thanks very much for that information Gazwould, it’s really appreciated.