VEMS Engine management systems, plug & play ECU upgrade

[blade7]

Set up the throttle position calibration, start the car, drive! A couple of hours driving max with a laptop running to map the fuelling (which is automatic) should have calibrated the fuel mapping and your done, 'burn' the config to the ECU. Fine tuning on a rolling road is optional.

Hi
When you say 'burn' is something like Ostrich required or is the updated map just downloaded from the laptop. And do you know how many maps can be stored ?

 

[trackm3]

Set up the throttle position calibration, start the car, drive! A couple of hours driving max with a laptop running to map the fuelling (which is automatic) should have calibrated the fuel mapping and your done, 'burn' the config to the ECU. Fine tuning on a rolling road is optional.

Hi
When you say 'burn' is something like Ostrich required or is the updated map just downloaded from the laptop. And do you know how many maps can be stored ?

the above is an ideal as mine would run but not very well so i would not of wanted to drive it for 2 hours !

 

[PhilKent]

I'm just a novice in this gents, I don't profess to being an expert in any sense, I just did my own research and had a chat with Peep. From what I understand you plug the laptop into the VEMS, run the car with the configuration that Peep will provide, this is the 'default' setup which should run the car okay. You then run the car in all driving conditions (hence the couple of hours driving around or use a rolling road) the VEMS analyses the air/fuel ratio at all throttle positions and loads and optimizes the fueling and ignition accordingly. Once you have 'all greens' in the results table you are done (or you can fine tune to your hearts content). This can then be 'burned' the the VEMS i.e. the config file updated in the ECU by saving it from the connected laptop. Once that's done you can unplug the laptop and have use the car 'as normal'. No need for any avian breeds as far as I know!

 

[PhilKent]

I believe you can have two maps stored and swap between with a jumper switch or something, but equally you can save any number of configs on your laptop and download them the the ECU at any time...

 

[Eldavo]

I've already got an O2 sensor for my innovate AFR gauge and a solenoid for my Apexii AVCR. I can monitor everything and tweak it in isolation to get a best fit but with VEMS everything talks to one another and provides a closed feedback loop for boost and fuelling.

I'll be deleting the AFM for a tube too, will reposition the air filter at some point when I've worked out why Turbo to go for later this/next year.

 

[blade7]

with VEMS everything talks to one another and provides a closed feedback loop for boost and fuelling.

What about ignition ? Not picking on VEMS here, just wondering...

 

[924Srr27l]

Trackm3 Easy to fit and Peep would always respond with my questions, my Dyno guy had it for 3 hours all sorted and starts on the button.

How much difference / improvement? in torque & bhp, out of interest...
R

 

[Eldavo]

with VEMS everything talks to one another and provides a closed feedback loop for boost and fuelling.

What about ignition ? Not picking on VEMS here, just wondering...

Not sure I understand the question? You can have a coil on plug setup or move to sequential injection if that's what you mean?

I'm leaving that side well alone for now.

 

[blade7]

with VEMS everything talks to one another and provides a closed feedback loop for boost and fuelling.

What about ignition ? Not picking on VEMS here, just wondering...

Not sure I understand the question? You can have a coil on plug setup or move to sequential injection if that's what you mean?

I'm leaving that side well alone for now.

I'm talking about the ignition curve, and advance run relative to boost, does it pull timing when knock is detected ?

 

[PhilKent]

with VEMS everything talks to one another and provides a closed feedback loop for boost and fuelling.

What about ignition ? Not picking on VEMS here, just wondering...

Not sure I understand the question? You can have a coil on plug setup or move to sequential injection if that's what you mean?

I'm leaving that side well alone for now.

I'm talking about the ignition curve, and advance run relative to boost, does it pull timing when knock is detected ?

Yes, the it does pull ignition timing when knock is sensed, usually upto about 36degrees .. You also have the ability to listen to the recorded files to manually adjust settings if you notice anything while driving...
HTH.

 

[blade7]

I've read the ignition requirements are quite different for example between a 2.5 and a 2.8. Mix in combinations such as comp ratio, 8 or 16 valves, boost level, fuel octane , ambient temp etc, and perhaps an experienced person is the best option to map the sparks.

 

[PhilKent]

I've read the ignition requirements are quite different for example between a 2.5 and a 2.8. Mix in combinations such as comp ratio, 8 or 16 valves, boost level, fuel octane , ambient temp etc, and perhaps an experienced person is the best option to map the sparks.

Absolutely! I wouldn't 'tinker' with the ignition map myself. I'd leave that to the experts.

 

[blade7]

When are you expecting to take delivery and have it up and running ?

 

[PhilKent]

Should be with me in about 4 weeks time and I'll get round to the install as and when I can after that. Depends how busy I am with work. I'll post an update when I get going...

 

[blade7]

Hope it works well.

 

[Eldavo]

There are various tasks that can be undertaken in the meantime. I need to find someone who welds aluminium - got to put an IAT sensor in the charge pipe between the intercooler and throttle body So need a bung welding in.

In other news, car clicked over 170k tonight. I wasn't sure exactly when as I was doing considerably north of 170kph at the time (obviously on a private road/dyn/in my dreams officer)

 

[blade7]

There are various tasks that can be undertaken in the meantime. I need to find someone who welds aluminium - got to put an IAT sensor in the charge pipe between the intercooler and throttle body So need a bung welding in.

Usual place for the IAT sensor is in the inlet manifold by the throttle body. That's where Porsche fitted it on the 968 RS. Simple job to drill and tap there.

 

[Eldavo]

I had thought that myself (I popped into Gmund cars and had a good nosy at their 968 Turbo RS) but the vendor suggested in the pipe.

 

[PSH]

There are various tasks that can be undertaken in the meantime. I need to find someone who welds aluminium - got to put an IAT sensor in the charge pipe between the intercooler and throttle body So need a bung welding in.

Usual place for the IAT sensor is in the inlet manifold by the throttle body. That's where Porsche fitted it on the 968 RS. Simple job to drill and tap there.

Sorry Paul but that's not the best place, best is in the hard pipe leading to the throttle body as close as possible so you can read the 'charged air'...if/when I get around to fitting a gauge myself I'll probably fit two sensors, one as stated and the other in the hard pipe before the intercooler. I can then see how well the intercooler is working...this is from experience of a blocked intercooler that seriously affected my power and wasn't discovered until the engine was stripped down for it's rebuild.

Pete

 

[GPF]

Hi Pete,

Don't quite understand that - you are measuring the charged air in the inlet manifold too? Just the other side of the throttle body, and it can take account of any effect the temperature of the manifold has too?

That's where I put mine - on the little circular platform just to the left and immediately rear of where the throttle body mounts.

As Paul says, it's simple to drill and tap it and makes a very neat install.

Why do you think the hard pipe is better?