Recent posts

#21

Triggering / Re: Cam Trigger Wheel Review

Last post by Jim_W - November 21, 2023, 06:40:53 PM

The application is for ignition using individual coil over plugs. The crank trigger is the standard 60-2 wheel and sensor.

I have not tried filtering the sensor. I will search the wiki for direction on this.

In the case that I want to change the trigger wheel, is the pattern described above suitable? My main concern is the number of degrees the rising or falling edge needs to happen before the spark event.

#22

Triggering / Re: Cam Trigger Wheel Review

Last post by jrussell - November 21, 2023, 05:21:59 PM

What's the application? Does your crank trigger have missing tooth? Have you tried just filtering the cam sensor rather than resorting to cutting it? The trigger settings in VEMS are incredibly flexible, and every case I've seen so far, can work without modifying the trigger wheel.

#23

Triggering / Re: Cam Trigger Wheel Review

Last post by Jim_W - November 21, 2023, 12:05:30 AM

Pics not embedding for some reason.

Original, stock cam trigger wheel: https://ibb.co/SQzs6M4

Revised wheel: https://ibb.co/xf4qvQM

#24

Triggering / Cam Trigger Wheel Review

Last post by Jim_W - November 21, 2023, 12:02:41 AM

I have a trigger wheel from a VAG 2.0 FSI (AXW) in the stock location, but it has 4 teeth. Two are ~15 degrees wide and two are ~65 degrees wide.
A picture of the stock wheel:


My plan is to mill most of the teeth away and leave a 15 degree tooth with a rising edge at 117 cam degrees/234 crank degrees after cylinder #1 TDC and a falling edge at 132 cam degrees/264 crank degrees after cylinder #1 TDC. See the new part overlaid with the original part here:


My understanding of the cam trigger is that it needs to happen before the spark event for cylinder #1. If the spark advance is set to 30 degrees, the rising edge of the cam trigger happens 51 cam degrees/102 crank degrees before spark and falling edge happens 36 cam degrees/72 crank degrees before spark.

Is this sensible? I just wanted someone double-check my homework before I started cutting metal.

#25

Solenoids / Re: IAC PWM Output

Last post by LuddeNo1 - November 18, 2023, 10:53:50 AM

I have a m119 with vems but don't know who installed it and it uses the stock triggerwheel but no cam-sync is configured and the config is like this having issues to start but once it started it runs ok.

#26

Solenoids / Re: IAC PWM Output

Last post by Kamuto - November 18, 2023, 08:12:57 AM

HI.
How did you do with the triggerwheel and cam-sync on the m119?

I guess it needs some external trigger wheel, unless you have some info or scope of it's crank signal

#27

Solenoids / Re: IAC PWM Output

Last post by LuddeNo1 - November 17, 2023, 04:21:44 PM

HI.
How did you do with the triggerwheel and cam-sync on the m119?

#28

Wiring & Sensors / Re: v3.6 + LSU4.9 + Wheel spee...

Last post by Jim_W - October 28, 2023, 01:13:59 PM

Thanks for correcting me on that. I see I made an error on my wiring diagram and put pump- on pin 8 instead of pin 7 where it belongs.

#29

Wiring & Sensors / Re: v3.6 + LSU4.9 + Wheel spee...

Last post by jrussell - October 27, 2023, 04:30:38 PM

4.2 and 4.9 pins on the ECU does not change at all. The one change is a 27k pull-up is needed on the nernst to 5V. No pinout changes at all. Not sure where you're getting that information.

There's some information here: https://www.vems.hu/wiki/index.php?page=GenBoard%2FManual%2FWBSensor
And a PDF of the sensor pinout and even lists the ec18 connector locations, which match LSU4.2: https://vems.hu/download/sensors/LSU4.9/LSU4.9_pinout.pdf

#30

Wiring & Sensors / v3.6 + LSU4.9 + Wheel speed

Last post by Jim_W - October 27, 2023, 02:07:15 AM

When upgrading to the LSU4.9 sensor when the original board was built for LSU4.2 one of the wideband wires conflicts with the wheel speed input. Can anyone point to how to connect a wheel speed sensor after upgrading to LSU4.9?