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Topic starter
hi,
recently i bought the torque app in particular for getting the pressure generatet by the 2 turbochargers of my Alpina B3 Biturbo. Each of the turbos should generate up to 1.4 bar. But what i getfrom the turbo boost PID are negativ values of vacuum from -22 to about 0 in/Hg.
So,
1. what do i have to do?
and,
2. what do i have to do, to get the boost separably for each of the 2 turbo chargers?
hope for a useful feedback.
d.c.
Posted : 13/12/2012 5:45 pm
Firstly, your car runs on small turbo first, then opens up the larger one. There is no individual measurement on pressure for each turbo, as they both blow into the same inlet piping. When you nail it, your car uses the smaller turbo, monitoring and regulating manifold pressure up untill a certain rpm, when it opens up the larger one.
Also, I believe there are limited PID values for torque when it comes to BMW. What you are selecting as turbo boost could be any calculation. You specifically need Intake Manifold Pressure. And need to remember that these sensors read from absolute pressure and in mbar. 0mbar is total vacuum. 1000mbar is atmospheric pressure. 2000mbar is 1 bar of boost. Torque may not be able to read all of these sensors, or may read them and display in different units.
Hope this helped.
Posted : 16/12/2012 9:21 am
Topic starter
... as i understood , the 335i diesel engine uses 2 turbos in series, as you told me, but the 335i petrol one uses the 2 turbos in parallel, i.e. one for three zylinders. that would mean, the Alpina b3 petrol version uses the turbos in the same way as the diesel version?
now, how is it solved on my car?
Posted : 17/12/2012 9:11 pm
