Turbo pressure general.

[Vega25]

Hello to all,
after a search on the forum without having found the results that I was looking for, I open this post to ask for a clarification.
Regarding the turbo pressure, I would have a doubt colossal. The extraction system, normally, has not the dynamic parts. Unless the car is fitted with a variable geometry turbine. So the question ? this...***** and is the unit to get ir? the air in the engine if the components are installed does not provide such possibility?? I don't know if I explained it well.....

[passione motori]

Hello, the control unit performs other functions of calculation, but not f? enter air into the engine, the task, and carried out from the turbo with the deal? and air pressure, it would be very + complex to explain in writing.........

[Vega25]

Forgive me I do not understand. My question was born because? in my controller c'? a map called "boost". For that....just because? the volume of the air inside the cylinder ? given the speed? rotation of the turbine, what is that entry in the map?

[passione motori]

if you need help and talk about your car, if you know that car ? you'll probably respond better to the questions.

[franco75]

also the classic wastegate controls the pressure, do not necessarily have to be surveyors variable

[Vega25]

Evening guys. Sorry you are right.....the car ? a saab 93 which mounts a diesel engine biturbo engine from 180 hp fiat.
I wanted to try to understand what he wanted to say the map "boost" in my ecu ? a edc16c39. In that way, the parameters in that map really intervene on the turbo pressure? Through the westgate? For? I knew that the westgate intervenes in the event of overpressure.....I need someone to shed light. Thanks to all.

[frenk85]

bh? you use several systems of "vent", or deviations,both in suction in the drain,the westegate ? one of these that serves to divert the exhaust gas in excess.the geometry does not ? a ring system that surrounds the impeller of the turbine have variable incidence and can be managed by the control unit which varies the angle based on the parameters that are inpostati. only by changing "boost"you will not get great results!!! it should be read and should be found addresses that, along with a "boost",you change the whole.

[Vega25]

And then the map turbo pressure on what is acting?

[biela]

And then the map turbo pressure on what is acting?

It is the target or desired boost.
After that, the ECU tries to obtain this target, using VNT.

Greetings

[dariuccio]

should adjust the control of the variable geometry