Recent Posts

11

Configuration / Launch control config requirements

« Last post by four0four on January 07, 2024, 03:52:58 am »

Hiya,

I have a VEMS pnp install from Peep that I've been using for some months, and I'd like to play with launch control (largely for traction reasons...). It seems straightforward to enable, and I can see the "launchcontrolsw" flag set in VEMSTune. I'm not sure if this is calculated on the ECU or in VEMSTune via ADC measurements, though, so this may not be useful. Despite this, the Launch Control flag never goes green (and the car obviously acts like Launch Control is turned off). 

I dug around in .inis and old megasquirtavr source, but I can't find any predicate I'm missing. Engine is on, warmed up, no errors present. I added an accurate wheelspeed source, which is perfectly functional. launchcontrolsw is green, Launch Control isn't.

From a default config, beyond wheelspeed:rpm table, what should be changed to enable Launch Control? I assume that it should go green regardless of config details given everything stated, and yet...

Thanks

12

Software / Re: VemsDisplay Android Bluetooth and Pixel 7

« Last post by LHK_audi_S2_Nor on January 05, 2024, 10:11:20 pm »

Thanks
Had to restore virgin config, then resize all gauges and the gauges fit perfect on the screen! and then of course change symbols here and there to personalize view but thats quick to do.
Thanks again! 

13

Projects & Installs / Need help with identifying Vems v.3 for m50b30 turbo

« Last post by Nsa777 on January 05, 2024, 04:33:47 am »

Hi everyone. Need help with pinout to the v3 that I bought used for my project. Bought car with missing ecu and partially cut wiring. Car specs: bmw e34 m50b30 turbo with ethanol. 3.0l forged internals, 2200cc injectors, hx55 pro turbo, nuke fuel system, vag red top coils.
Bought a used vems ecu that supposedly was installed on m50b25 turbo with ethanol.
Need to know if I can connect vag coils to 36 pin connector.
If I didn't wrote enough details, please forgive me since I never worked with any aftermarket ecus and trying to get everything done by myself.
Pics of vems attached
Thank you in advance
<a href="https://ibb.co/M5TNGLn"><img src="https://i.ibb.co/XkBJ3TX/20231228-211901.jpg" alt="20231228-211901" border="0"></a>
<a href="https://ibb.co/Dtb8WCh"><img src="https://i.ibb.co/qdnWjsK/20231228-211907.jpg" alt="20231228-211907" border="0"></a>
<a href="https://ibb.co/svcbQ0D"><img src="https://i.ibb.co/27RWPDL/20231228-211915.jpg" alt="20231228-211915" border="0"></a>
<a href="https://ibb.co/Y04fZXQ"><img src="https://i.ibb.co/TWDPL12/20231228-211924.jpg" alt="20231228-211924" border="0"></a>
<a href="https://ibb.co/80vGV1j"><img src="https://i.ibb.co/rm8qJDZ/20231228-212022.jpg" alt="20231228-212022" border="0"></a>
<a href="https://ibb.co/M93QMsz"><img src="https://i.ibb.co/JCMg5KY/20231227-215626.jpg" alt="20231227-215626" border="0"></a>

14

Software / Re: VemsDisplay Android Bluetooth and Pixel 7

« Last post by jrussell on December 30, 2023, 12:24:08 am »

Settings -> Resize all gauges will get you back on track.

15

Software / VemsDisplay Android Bluetooth and Pixel 7

« Last post by LHK_audi_S2_Nor on December 30, 2023, 12:03:21 am »

Hi, I have used Vemsdisplay for a few years, now I got a Pixel mobile phone, and the picture does not fit on the screen, only about 2/3 of it is displayed.
Anyone BTDT and fixed it?

16

Triggering / Re: Cam Trigger Wheel Review

« Last post by jrussell on November 21, 2023, 09:44:59 pm »

Looks like on that wheel the rising edges are 90 degrees apart (that would typically be falling edge on a hall sensor signal).

So you'd want to set the hall sensor to rising edge in VemsTune. Then do a triggerlog.

You should be able to see a value in the triggerlog results where "Ignore sectrig pulses above" can be set and it can use the first "wide" tooth after the missing tooth on the crank sensor. The value would be 22 if the missing tooth is at TDC, but it's probably not, so I can't tell ahead of time.

Your modification should work just fine, but it's not needed in my opinion.

17

Triggering / Re: Cam Trigger Wheel Review

« Last post by Jim_W on 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.

18

Triggering / Re: Cam Trigger Wheel Review

« Last post by jrussell on 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.

19

Triggering / Re: Cam Trigger Wheel Review

« Last post by Jim_W on 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

20

Triggering / Cam Trigger Wheel Review

« Last post by Jim_W on 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.