90 bmw 325 m50 swap

[mattias]

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.

When will PID be turned on? (My M20 is only running from the ref table.)

You quoted the answer from Gunni.. What are you having trouble with? (you can bring this to another thread)

[DevInAz]

Since we melted the boost solenoid tubing on the dyno the car is only running on a 10psi spring.

I now have two things to do next. 1 is move the boost solenoid to a different location. I'm going to use two feet of brake line tubing to run along the bottom of the frame rail to prevent anymore melting and switch my vacuum line to the braided lines that come on 335 wastegates since I have that stuff hanging out in the garage.  the second is change the wiring on my PnP harness to use a extra ignition driver to drive my vanos unit. Last week I got my new transistors in and I soldered one into my vems the other night but haven't checked its operation yet.

I am still having trouble with  my load sites around 2000 rpm and 60kpa. I have a bad misfire when only 1-3% tps position is saw by the vems. I will be retuning the VE table after taking Mattias's advice of changing my injector ramp up to 300us and adjusting my warmup to 0 after 80C. I will also be turning on vanos at 2500-+. I need to lookup the vanos on and off timing of stock tables and i'll just copy them in to vems. Once the car is up and running we hope to have the car safely tuned to 420lbs at the wheels with a flat torque curve up top.

[DevInAz]

Can someone take a look at these logs files. I have a miss fire around 2200 with only slight throttle. I've moved around some of the throttle accel enrichments but I can't seem to get it to go away.

http://www.box.net/shared/g95t79hke9
http://www.box.net/shared/or7l3gnxhr

On the log it shows that its going lean but I think its a rich misfire.

[mattias]

You can use high gears to map the low kPa rows at 1000-3000 rpm. Very easy to modulate throttle to maintain a steady kPa and sweep up the rpms slowly, use a gear high enough to make the engine accelerate slowly at that intake pressure.

Definately too much acc enrichment, decrease the dot scale table. In fact remove acc enrichment until you've made a good base VE map.
Use WOT in 5th gear to accurately map 100 kPa line from 1000 rpm, that will fix some desire to overcompensate acc enrichment.

Drag'n'drop my config over your acc enrichment tables, warmup enrichment table, ..
Increase number of afterstart cycles for cold engine. Increase warmup scaling at 100 kPa, if you care for it.
Lower your injector effective rampup (to 0 or 200-300 at most) and increase your battery compensation to 500, that will fix the "hole" in your VE map at idle which you have created to compensate for too high values in the injector rampup.

[DevInAz]

I'll do it tomorrow morning and report back. When I adjusted injector ramp up to 300 at what kpa or rpm does the table not need to be adjusted anymore? up to 100kpa or so?

I'm not sure if that makes since to you. There aren't any side notes or anything under these little menus when pressing f1. I hope that with some new versions of vemstune these things start to get filled in for the rockies like myself.

[mattias]

Only the low load will need tuning = low pulsewidth.

[DevInAz]

Mattias I did everything you said on my config and this car was running great! right up till my vacuum lines to the wastegate melted. It was on my stuff to fix list anyway. The dead spot is gone and the car is smooth all over the low end.

I'll fix it in the next few days.

[DevInAz]

UPDATE: 6/5/11

I've installed my boost controller. The lines that Im using are a little long so i'll be buying the crimping tool and some new end fittings to make everything fit exact.

I've ran into a problem while testing the boost controller before road testing. It seems that i'm not getting ground out of my vems while switch testing. I changed the outputs and the wires from EC36-pin 11 and 12 but can't seem to get ground out of either of those pins. I'm not sure if my previous driver problem is causing this problem or not. Anyone have a good idea how to trace this back instead of pulling the vems apart and looking?

Can I use a different output besides a injector output?

[gunni]

You can use an ignition output, that´ll work fine.

[DevInAz]

I don't have any extra injector drivers. 2 are being used by the idle valve and 6 are the injectors. 6 ignition drivers are being used but the 2 extras don't work for some reason. would a p259 chip fry if I used that to drive the boost solenoid? I still need a vanos driver at some point also.

Maybe I should blend 6 cylinder into 3 drivers and not run full sequential since I haven't been using it and use the extras for the boost solenoid and vanos solenoid.

Gunni have you made any progress on cam sink?

[Ascona 400]

If the solenoid have more then 12 ohm resistance, you could use one of the stepper outputs. The stepper outputs can handle 1A.
 

[gunni]

I don't have any extra injector drivers. 2 are being used by the idle valve and 6 are the injectors. 6 ignition drivers are being used but the 2 extras don't work for some reason. would a p259 chip fry if I used that to drive the boost solenoid? I still need a vanos driver at some point also.

Maybe I should blend 6 cylinder into 3 drivers and not run full sequential since I haven't been using it and use the extras for the boost solenoid and vanos solenoid.

Gunni have you made any progress on cam sink?

There is one M50B28 running full camsync without issues and works like a charm. To be honest the gains aren´t that influencial.

[Erikk]

Im running several m50b25´s with camsync.

[DevInAz]

If the solenoid have more then 12 ohm resistance, you could use one of the stepper outputs. The stepper outputs can handle 1A.
 

Thanks! i'll check the resistance of my solenoid.

[sergeval]

Can someone take a look at these logs files. I have a miss fire around 2200 with only slight throttle. I've moved around some of the throttle accel enrichments but I can't seem to get it to go away.

http://www.box.net/shared/g95t79hke9
http://www.box.net/shared/or7l3gnxhr

On the log it shows that its going lean but I think its a rich misfire.

Hi, don't know if you have this problem solved, but i checked your log, and found something that could cause this.

You have your "TPS value for idle threshold" = 3 , meaning that when your TPS is <= 3% your car tries to idle, because you have " Idle ignition advance" enable it allows the ecu to retard your ignition up to 8 degrees.
So when your are driving at 2000 RPM but with the TPS <= 3% some times your ignition gets lowered from 17 deg. to 9 deg. , because the ECU wants to idle. (you can see this ignition bumps in the log )

I would drop the "TPS value for idle threshold" to 0, and check how it goes.
Hope it helps, tell us if this helped, good luck.

Best Regards.

Sérgio Fernandes