Recent Posts

1

Software / Vems android log issues

« Last post by ahberg on June 17, 2019, 10:57:32 pm »

Hi

I tried to log with vems display android
But only some logs works to convert in vemstune.
The rest says: The conversion is failed.
Got the newest software

//Marcus

2

Wiring & Sensors / Re: Analog Multiplexing issue

« Last post by Kamuto on June 14, 2019, 02:09:45 pm »

Hi,

I have analog multiplex connected inside ECU (done by order during ECU build) and all seems to be working in steady state. It is switching, sometimes it is like ECU takes few sec till it start switching analogs.  >> Engine stopped "noise "clearing out VIDEO >> https://youtu.be/vZWfPuv0T38


However It is really strange behavior with engine running, it seems to me like lack of speed or something .. result is useless analog inputs.   >> Engine running  VIDEO :https://youtu.be/htHuMvQeEzE

Firmware : 1.38

Anybody who made it ?

updated ini files in vemstune?

3

Wiring & Sensors / Analog Multiplexing issue

« Last post by Matus on June 13, 2019, 12:06:10 am »

Hi,

I have analog multiplex connected inside ECU (done by order during ECU build) and all seems to be working in steady state. It is switching, sometimes it is like ECU takes few sec till it start switching analogs.  >> Engine stopped "noise "clearing out VIDEO >> https://youtu.be/vZWfPuv0T38


However It is really strange behavior with engine running, it seems to me like lack of speed or something .. result is useless analog inputs.   >> Engine running  VIDEO :https://youtu.be/htHuMvQeEzE

Firmware : 1.38

Anybody who made it ?

4

Wiring & Sensors / Re: best place for air temp sensor

« Last post by msh on June 10, 2019, 07:28:21 pm »

While using this forum I've noticed two approaches on sensor placement - one is what Gints mentions, no explanation needed - another, mentioned by some other power users, is exactly opposite -  to place it as far away from throttle towards air filter, as possible, with the logic that air doesn't heat up considerably in intake. I'm currently experimenting with this approach with my golf, since it is way easier to drill holes in air filter box than in intake manifold Recently I found out that even sensor installed in filter box in front of outlet can be affected by heat soak quite enough, so looks like it has to be put at the inlet of filter box.

In case I won't be able to get satisfactory results [max 1-2% lean when leaving supermarket after shopping] , I'll return to metalworking tools to place sensor in some intake runner...

5

Wiring & Sensors / Re: best place for air temp sensor

« Last post by GintsK on June 10, 2019, 04:03:47 pm »

I would say best place is in the flow (to faster responce) in place where it reads temperature entering the combustion chamber. However sensor itself is too big for placing it in cylinder intake runner. Close to runner entry maybe. And use fast sensor as possible. VEMS has no any delay calculations.

6

Triggering / Re: Help needed on AudiTrigger secondary trigger hardware configuration

« Last post by GintsK on June 10, 2019, 03:58:25 pm »

I do not think Audi hall scope working in latest firmwares.
Use 1st.

However you can feed Hall to both: inverter transistor and third trigger input. So you will be able to check Hall position by changing rising/falling in third trigger.

7

Triggering / Re: how to connect ground and shielding for secondary trigger

« Last post by msh on June 08, 2019, 11:30:38 am »

What kind ir your secondary trigger - hall or VR?

For VR sensors I usually use audio cable with two wires in it, the connector end is soldered to corresponding pins in connector, at the other end, IIRC, I usually connect shielding and ground together, and then with all sensor grounds. For hall sender I don't see a reason why it should have shielded cable.

8

Triggering / Help needed on AudiTrigger secondary trigger hardware configuration

« Last post by msh on June 08, 2019, 11:24:41 am »

So, I've audi 10v turbo engine, with it's stock AudiTrigger, controlled by self assembled V3.7 unit. The problem is - since information about AudiTrigger secondary trigger hardware is controversial, it seems that I've made a mistake with secondary trigger, so the question is, which of the two are correct approach:

1) Output of secondary trigger converter chip is pulled down by transistor so that ECU can receive signal only when cam hall sees the magnet
2) output of converter chip is undisturbed, but cam hall, through cam hall inverter, is connected to separate ECU input and "audi cam hall scope" enabled in configuration, so ECU ignores secondary trigger signals when cam hall doesn't see magnet.

Do I guess right and second is the correct approach?

9

Projects & Installs / Re: Jaguar V8 compressor / offroad project

« Last post by Kamuto on June 08, 2019, 03:54:23 am »

can you do trigger  log?

10

Projects & Installs / Re: Jaguar V8 compressor / offroad project

« Last post by jrussell on June 08, 2019, 03:16:11 am »

I didn't see any obvious problems in the cfg. The serial number is quite old though, are you sure it's configured correctly with respect to hardware?

Is the issue on those 4 cylinders ignition or fuel? That answer may help narrow it down.