90 bmw 325 m50 swap

[DevInAz]

Thanks Sergio for the tip! Mattias solved my problem awhile ago and it was due to my injector ramp up angle but thanks. I'll play with that and check it out

[DevInAz]

UPDATE:

started work on the car again. Its running good but we still have the problem with the boost controller. We removed the 10psi spring and put in a 5.4psi spring. We disconnected the boost controller from the wastegate and ran the car while logging.

- Logging isn't working. The button is green and i've checked all the folders. for some reason when we push log nothing gets recorded. We are running 1.1.81 firmware in this car and the Latest version of vems. I went to my 745 and tried again and still found no logs get recorded. its something with my computer but I'm not sure what it is.

- Logging problem was my laptop. Everything worked but no logs were being recorded. Switched laptops and everything works great.

[gunni]

Do a search on your complete hard drive for the logs.

*.vemslog

It must be in there somewhere.

[DevInAz]

I did the search and it found 10 logs but they were all for march-2 of this year when we were at the dyno. All the new logs haven't been recorded. I'm going to try and uninstall vems and reload it to see if that does anything.

FIX - uninstalled VEMS then reinstalled with the latestest version. Now my original laptop is working again.

[DevInAz]

Why am I getting this third trigger error? I've looked at every menu i'm pretty sure and didn't see anything about this..

Also I have my second trigger disabled so why is the min max second trigger angle error on the screen? I've changed it to 1 and 360 like i've seen in other config but it didn't work.

[DevInAz]

I'm starting to get somewhere with my boost control. I have the power running through a fuse off the ignition switch and the ground coming from a ignition driver on pin 24. If I disable pin 24 and hook up my soleniod I still have a ground coming through the VEMS which is keeping my solenoid turned on. If I turn the solenoid on in vemstune then my solenoid is pulsing on and off very fast even with the engine off. I know for sure I don't have any outputs crossed but I'm still getting a ground when I shouldn't be. Do I have another internal problem with my VEMS? somehow I already killed 2 ignition drivers internally in the processor. I'll measure the resistance of my solenoid right now.

[DevInAz]

Boost soleniod is now on stepper D. I grounded one side out where all the VEMS grounds are then attached the other pin to stepper D. I can test the solenoid on and off and it works just fine. One of my problems was I had my P setting on 200 and the I and D on 0 so the solenoid kept pulsing on and off. I've raised my fuel cut to 200 kpa and ran the car to see if my solenoid would hold the boost at 140kpa but it didn't. The boost still shot up to 200 and hit the fuel cut. I'll post up photos of my logs and pictures of my boost controller menus to see if someone spots a mistake with something. I wish that the boost controller pages had the F1 menus filled in.

[DevInAz]

Here are some logs.  Does anyone know how to tell in the log viewer if the boost solenoid is being activated?

http://www.box.net/shared/4mm802t26qr8zpq0gfze
http://www.box.net/shared/4faxvxzd7qt2qcrsis4r
http://www.box.net/shared/gsqdtjzxiya75k281rju

[DevInAz]

Here are pictures of my settings. I have something set wrong because it always over boosts till the fuel cut is hit.








If I switch the output channels to test my boost solenoid is activated on and off perfectly. When the solenoid is off the pressure is on top of the wastegate diaphram and when the solenoid is switched on the pressure is pushing on the button of the diaphram to open the wastegate. I'm sure this problem has to do with my VEMS settings.

[mattias]

You should invert the functionality of the valve if you want to get anywhere. I would say your problem is how you hooked up the solenoid, not some configuration error. More dutycycle should raise the boost, not the other way around.

[DevInAz]

Thank you i'll try that tomorrow and report back.

[DevInAz]

I inverted the sensor like you suggested Mattias but it was a no go. It makes way more boost now then it did before. I have removed the boost controller and put in a 5psi spring and drove the car around. It holds the correct boost the entire time so its not a wastegate issue.

I'm going to get working on it again tomorrow.

[jrussell]

When the solenoid is off the pressure is on top of the wastegate diaphram and when the solenoid is switched on the pressure is pushing on the button of the diaphram to open the wastegate. I'm sure this problem has to do with my VEMS settings.

Remove the line to the top of the wastegate and it should work much better. I've never had good results running both ports on the wastegate from the same valve. I've actually run into the same problem as you and removing the top port line fixed it. It was on the dyno, so I didn't investigate much.

[mattias]

It's a lot more complex to regulate boost that way, not sure you can use only a ref dc curve alone - PID most likely.  I haven't had luck either which is why I suggested hooking it up differently. I would use the single solenoid to apply boost to the top port, and maybe add a second valve to the bottom port just to get quicker spool (bleeding of all boost until a set pressure, not effective on many setups especially with a strong/correct spring pressure).

[DevInAz]

The valve that i'm using right now switches 1 of my 2 ports on while the other is switched off.  How its setup right now is while the solenoid is off boost flows through the valve and is applied to the top of the gate. At 145kpa where I have my boost target set the valve switches from the top port to the side port which should open the wastegate at 145kpa only its not.

jrussell - at this point i'll try anything to see if something changes.

I'll post a picture of my log in a minute.