jazd's Mini Build Thread

[benough]

Wouldn't a stock car just have one map in it though?

[jazd]

Any car's ECU will have hundreds of maps contained in its code. Each will take one or two variables and translate it to another value, the map in the screenshot I posted is for calculating injection quantity. It takes the current RPM and the requested torque and translates it to the amount of fuel that needs to be injected.

What you are thinking of is a set of maps, where some tuners give you the ability to switch between the stock maps and the modified maps on the fly.

[benough]

Got it.

[gldgti]

The latest thing I have been working on is developing software to detect maps in my car's ECU dump. If you are interested check it out here - PPD Maps - ECU Map Detection Software
Screenshot - http://img856.imageshack.us/img856/9...m201208111.png

Thats neat mate - really cool!

I was looking into mapping about a year ago but I was so busy with work at hte time (still am) I let my interest fall by the wayside - but that was about the time I got to the stage of "ok, how will I separate out all the different maps?"

You've done just that - very nice. Did you write it in python? (I see you've used qt for the gui)

[jazd]

Yeah remapping is a hard thing to get into, people don't like to share information so it's hard to learn.

These Siemens ecus are particularly tricky because they don't put the axis information right before each map unlike the bosch ones found in most vw tdis.

It's written in C++ and yeah makes good use of the Qt libraries. I probably should statically link it so it's not lugging 10MB Qt libraries around...

[gldgti]

Yeah, its locked up pretty tight in terms of knowledge. I guess tuners feel they have a lot to lose by sharing the info... maybe they do, but the way most people are precious about their newer cars, and that the vast majority of people wouldn't even imagine tuning their own ecu, I don't know if its a justified fear.

The ECU in my Skoda is the Bosch EDC-16 (I think its a 16..) so probably a lot easier to deal with than your Siemens one.

You've inspired me again.... my wife will not be pleased, I should be drawing up house plans

[jazd]

ECU Connections has a lot of good info.
This might help you - ECUCONNECTIONS Engine Tuning Social Network • Login

There is also these two projects which are similar to what I did but I'm not sure they will work on EDC16.
ECUCONNECTIONS Engine Tuning Social Network • Login
ECUCONNECTIONS Engine Tuning Social Network • Login

[jazd]

Anyone got a ELM327 adapter? Wanna try this out for me?

Its a small app for reading the VW specific measuring blocks over the OBD2 port.

VAG Blocks - VW Measuring Blocks Reader

[benough]

Where can I get one?

[jazd]

eBay, you can get Bluetooth and USB versions. Just search for ELM327. I have a orange/blue labeled one in Bluetooth (1.4) and USB (1.5) and both work. That said the cheap eBay ones are clones and some may not work.

I also have one of these and it is the fastest and I know it works.
ScanTool.net LLC - OBDLink SX Scan Tool/OBD Interface - ScanTool.net