You don't get Siemens on the 110 406, only the 90 406. I usually set 140 BHP on the stock intercooler, fit a bigger IC and a bit more boost and it's no different to what we do on the stage 2 maps for the 90 models.
What might give you trouble however is the boost sensor, when you start getting nearer to 1.45 bar the sensor will have SRC high and flag a fault code. This means you either keep boost below 1.4 (which is 20.5 PSI) which is more than adequate, or you fit the 3 bar map sensor to account for any boost spikes. Boost will always spike a little unless you turn down the response rate so it needs a good balance between the two.
For example, I've just finished setting up the stage 1 on my 1.6 HDI, the boost sensor on that only goes to 1.5 bar, no problem for a stage 1 at all.
I've now added a massive intercooler and have a bigger turbo to go on so I've calibrated the 3 bar map sensor. There's no need to go to 3 bar, but I can set 1.45 bar boost (21 psi) without the risk of going out the range of the sensor.
I'm in the process of setting one up for a 110 2.0 HDI, just awaiting details of the map sensor so I can calibrate it correctly.
With all that said, I quite often set 150 BHP on the 2.0 110 models if they are low mileage and in good condition, I do recommend the larger intercooler though. It's also worth removing EGR, cat and those air dosers which restrict your pipe work.
What might give you trouble however is the boost sensor, when you start getting nearer to 1.45 bar the sensor will have SRC high and flag a fault code. This means you either keep boost below 1.4 (which is 20.5 PSI) which is more than adequate, or you fit the 3 bar map sensor to account for any boost spikes. Boost will always spike a little unless you turn down the response rate so it needs a good balance between the two.
For example, I've just finished setting up the stage 1 on my 1.6 HDI, the boost sensor on that only goes to 1.5 bar, no problem for a stage 1 at all.
I've now added a massive intercooler and have a bigger turbo to go on so I've calibrated the 3 bar map sensor. There's no need to go to 3 bar, but I can set 1.45 bar boost (21 psi) without the risk of going out the range of the sensor.
I'm in the process of setting one up for a 110 2.0 HDI, just awaiting details of the map sensor so I can calibrate it correctly.
With all that said, I quite often set 150 BHP on the 2.0 110 models if they are low mileage and in good condition, I do recommend the larger intercooler though. It's also worth removing EGR, cat and those air dosers which restrict your pipe work.