Stage 3? BMW 320i E36 siemens ms41 1998

[cantontech]

Hi there,


I have a BMW 320i E36 siemens ms41 1998 with injectors from 2.5 and compressor from SLK 230K.

I try to do chiptuning file, after 3000 rpm its ok, but between 700 and 3000 rpm, I have a hole / a drop of power.

anyperson do this type of mod ?


best regards.
thanks in advance.

[rabanne]

Hi, what boost do you have till 3000 rpm? Did you log the AFR?

[jnoroeste]

Hi M8,
It´s just imposible from distance without some measuring data, lambda/afr? boost? Ignition retards? Knock? Fuel pressure?
Atm? Compression ratio?
Regards.

[rabanne]

Not necessarly, if there is someone who already did this, that should be no problem but, the SLK230 Eaton supercharger, should have a fixed pulley to work with the M52 engine pulley system, as the original one has magnetic and electronic control during idle, and because it will build up boost rotated by the crankshaft it will do it slow and progressive and it will hit top boost at peak rpm. That said the M52B20 it is well known to have torque problems below 3000 rpm and your supercharger boost will start to feel alive just above 3500 rpm. Whatever you do to it, it will still behave the same. Supercharger on this engine is really unefficient.