Messages

1

Engine management / Re: M42 VEMS PnP

« on: January 03, 2016, 07:52:39 AM »

Excellent.

I will keep looking at this thread to monitor for questions from you or anyone else. I thoroughly believe this is the ideal solution for most M42 projects.

2

Engine management / Re: M42 VEMS PnP

« on: January 02, 2016, 03:11:30 PM »

A M42 PnP will be made entirely from a M50 PnP PCB , not a new PCB design.
It will allow more outputs but not all the features you have mentioned due to PCB alterations etc.

3. Thats for one person and not everybody else so in reality no.

4. Tacho works naturally,
the fuel consumption will not work, and 1.6ms fixed per event would never give any fuel amount rate change right?? I suspect if you measure injector opening time and the fuel consumption you will find a strong relationship.

5. Download the software and you will see what options there are
a) to add injectors you would simply take JP connectors, crimp the wires and press them into the M50 PNP injector outputs then route to your new injectors.
b) tacho already works perfectly
c) VSS already works
d) wonīt happen
e) they are already along with the 10 pin auxiliary connector.

Its a PNP not a development setup, that would be best done with a regular VEMS.

3

Engine management / Re: M42 VEMS PnP

« on: January 01, 2016, 08:31:07 AM »

1. No jumper wires, the outputs are in the 88pin already, you would need Junior timer connectors and wires to add outputs.

2. I canīt promise anything with throttle response, only that is can be as good as possible the manifold arrangement allows.

3. You could take the lambda wires coming out of the ECU and splice them into the M42 loom via. No internal options are there so you can route them internally into the 88pin unless you open the ecu yourself and start cutting PCB pins and routing wires that would normally go to the Wideband connector.

4. The M42 is a simple thing,
VR crank, VR cam, all outputs are grounding, all inputs are 0-5v and thats really all you need to know about it, no need to scope anything really.

4

Engine management / Re: M42 VEMS PnP

« on: December 31, 2015, 05:34:57 AM »

The map input is the same as the FPR, the throttle response is a function of fuelling against TPS rate of change at various rpm's, so MAP measurement point is not crucial.

I am working towards using a M50 non vanos PnP to run a M42, this is infact the best possible option and gives the most versatility possible for a M42 user.
This would mean that the remaining injector and ignition outputs are actually mapped to the 88pin connector. The M50 PnP caries a custom VEMS PCB made specifically for the 88pin connector so there are no wires inside to tap into.

So in short you can infact add wires to do sequential injection this way. i.e. 8 total injector outputs (2 used for std injection, 1 for idle control valve, leaving 5 available in the 88pin for other outputs, 3 when using sequential injection) also 2 extra IGBT outputs.
So all in all 7 high power outputs for whatever along with all the auxiliary inputs and outputs.

I do not mind the questions at all.

5

Engine management / Re: M42 VEMS PnP

« on: December 31, 2015, 02:01:52 AM »

Good questions

1. The VEMS is capable of tracking ignition timing to well above 12k rpm, there is no actual run time difference when it comes to timing sparks, timing fuel or any other calculations.

2. There is no MAF support, I have tuned 100+ engines without MAF and a few with and I cannot see the benefit at all when it comes to standalone tuning, also the ecu has wideband closed loop so itīll keep your lambda on target. You can tune a VE table in less then 30 minutes on the road to almost perfection. The VE table output is sent to the Lambda target output table which modifies the output to correctly adjust the "load" for lambda targeting as in a load based system.

3. The auxiliary connector comes with 2 high power outputs and a relay output so possibly it could (Iīll verify). Sequential injection is good for emissions and some economy and a little better throttle response (meaning less fuel to get the best possible throttle response) which anyway is always poor on a single throttle body system anyway. The injection sequencing on a 4cyl semi sequential is actually good since the injection is always on a closed valve for optimum vaporization.

4. as in 3, http://www.vems.hu/files/M50Turbo/scn011.pdf , you have some inputs and outputs to play with already.

6

Engine management / Re: M42 VEMS PnP

« on: December 30, 2015, 09:56:32 AM »

Hi guys.

I am the organiser of the group buy, I joined so I can make sure to answer any and all questions there might be.