90 bmw 325 m50 swap

[DevInAz]

Hello every body. I'm posting this for a friend. hopefully people can find some of this information useful for your own projects.

My friend Anthony bought this car with the m50 swap and 5 lug swap stuff already done. Here are some pictures.






After buying this car and trying to tune the MS1e 3.57 we decided to install a VEMS 3.6. Anthony contacted Gunni at GSTuning in Iceland and he built us a m50 to VEMS adapter! Here is the adapter installed in the car.




Gunni has gone above and beyond in helping us get this car running and tuned for daily driving! Here is a picture of the harness he built with our own grounding block.

[DevInAz]

More of the VEMS harness




This is how we have the vacuum lines ran.



One of these lines run into the VEMS unit and the other one runs to the stock fuel pressure regulator.

Here is a picture of how we tapped into the compressor housing and ran this line to the boost solenoid and then back to the wastegate.

[DevInAz]

Some engine bay pictures. Everything is very dirty and the harness will be pulled out and wrapped once we have all the accessories that we want up and running. We still need to install a fan relay for the vems to control instead of the fan running just from kl30 (key on). 



This is the old manifold that was installed before we got the car. We have a different intake manifold installed, the vacuum hoses in the picture are no longer there.

[DevInAz]

here are some of our settings that might be useful to some people. As of right now we do not have our secondary trigger enabled.

[DevInAz]

[DevInAz]

[DevInAz]

[DevInAz]

This is a stock M50 straight out of another car. All the motor pictures in this thread will be installed at a later date.

[[email protected]]

Thanks for posting that, nice clean looking car and installation.

[mattias]

Nice and tidy, I like.

I noted that the "idle control type" is set to 2stepper", while it should be "pwm". Obviously things work out anyway..

[multiplex]

nice work!

using the stock temp sensors?

[gunni]

They should. 

[DevInAz]

Thanks guys but it has a long way to go. Mattias I was also told by Gunni to use PWM but for some reason when I select it I cant seem to control the idle.. I'm sure i'm doing something wrong I just dont know what it is. Since its been on stepper it idles good so I kinda just left it. All of the sensors on the car are stock for the m50 including. The idle valve is also stock.

[gunni]

I just dialled in the icv on the S50 , so i´ll send you a config with that info.

You can test the icv to see if it works by sending it forced duty cycle. This way you can find the maximum idle rpm you want and least rpm you want and set them as maximum and minimum duty cycle, then it will be stuck inbetween those. Then adjusting the DCref table to suit each engine speed while PID is still turned off. When you have that sorted you can enable pid and fine tune it.

you can crack open the throttle a couple of %´s (1-3%) while you do this and wind it back down while opening the icv more and more and maintaining idle.

[DevInAz]

Gunni most of what you say I have to read multiple times because I don't understand it clearly but thanks for taking the time to teach us.