Boost Controller,  Parts to use

If you have a Vacuum actuated turbo where you want to use the built in boost Controller you should have one of these.

This is a vacuum valve meaning if it has 100% PWM, there are max vacuum = Wastegate closed, if 0% PWM no vacuum = Wastegate open.

The part is used in Many Mercedes cars from 1997 to 2000 both for boost control and EGR,

It is connected to the two pins marked in red, it does not matter how they are connected as it is a solonoid,

Boost Controller part of the 722.6 controller.

The Boost controller can be used in different ways.

If you want to use Boost Controller

Goto “Boost Control” -> “General boost” -> “VNT Boost/EGP”

The value means the following

0 Boost Controller in PWM mode allow, you to specify PWM depending on boost, see later in this document)

1, 2, 3, 4 is for VNT Turbos 4 different algorithm to adjust boost

5 is for Normal Turbo

6 is for Normal Turbo more aggressive limit

7 is for Normal Turbo even more aggressive limit

8,9,.....................

20 extreme aggressive limit

At the bottom we have the Boost Control menu

In there is a General Boost, and all the many data points you can change

Lets say you have an normal Turbo, just want to open wastegate when boost hits 1 bar

Goto “Boost Control” -> “TPS -> Boost” 

Press -> on the joystick.

Here below you have 11 data points for any throttle position, 0.10.20.30....100%

Right key gives you next point, Left gives you previous.

Up key higher value, Down lower value

Check out this YouTybe Video

http://www.youtube.com/watch?v=ULEGavGRavs

To see what you have programmed you watch the live data in the live data menu.

Here you see that TPS is 41% and the Limit is set to be max 0.6 bar boost = 9 PSI. at that throttle position. But as you see boost are a little higher, that's why the PWM out is not 100% it has started to open the Wastegate on the turbo.

If you want More Control over what happens, you can specify exactly what PWM signal is sent to the Boost valve.

PWM is Puls width Modulation. if it is 10% that means that yeo have 10% power to the solonoid valve, and wastegate is almost fully open

If PWM is set to 100% the solonoid will make full vacumm and wastegate will close

Goto “Boost Control” -> “General boost” -> “VNT Boost/EGP”  set value to “0”

Goto “Boost Control” -> “General boost” -> “Use PWM-1 Boost” set to “1”

Now the menu has Changed and ready to do PWM.

Goto “Boost Control” -> “EGP-Boost -> % PWM” set what you want here

Goto “Boost Control” -> “Boost -> % PWM” set what you want here

Goto “Boost Control” -> “RPM -> % PWM” set what you want here

Goto “Boost Control” -> “Speed -> % PWM” set what you want here 

The lovest PWM value will be taken from the above and send to Valve

On Picture below you see that the boost limits PWM to  30 %

MERCEDES W210 E300 Turbo Diesel Boost Sensor If you need max 1,65 bar = 25 PSI

Then the originally MB boost sensor from a W210 E300 Turbodiesel can be used as it has a standard 0-5 volt output

I have only tested this exact type below

“Boost  Control” -> “General Boost” -> "0 point boost"      set it to 305 if this Mercedes sensor is used

“Boost  Control” -> “General Boost” -> "Max boost at 5v"  set it to 170 if this Mercedes sensor is used

If you are running a standart OM605 / OM606 that has this sensor alredy mounted,

Then you only have to connect the Signal wire, as it already has both ground and 5V