how to map my own car

[bernsaudi]

hello all, what do i need to buy to be able to map my own car as and when i wish, rather than having to get someone else to do it? cheers, bernie

[quattronutter]

aftermarket management unless your feeling lucky about cracking motronic...

[DJones]

A spare engine if you have never done it before...

Getting it mapped professionally is well worth the money honest...

[a4kquattro]

hello all, what do i need to buy to be able to map my own car as and when i wish, rather than having to get someone else to do it? cheers, bernie

VEMS

[CliveH]

You're having a larf, aren't you...?

[Jamo]

Aftermarket ECU is your only option. Unless your prepared to wait a few years whilst you learn motronics.

There are people out there mapping motronics who still don't know the ins and outs of it making short cuts such as disabling knock detection etc.

The information isn't freely available and a tuner is not going to give you the information to their work lively hood.

[aelred]

You need a reasonable amount of additional items in order to map it properly or to its full potential. As per Djones comment you can destroy the engine in no time unless you have the experience and knowledge, specially a high BHP one

[gedu]

You need aftermarket ECU, loads of patience, your wallet needs to be so heavy you can't stand up. You also need to know about ignition timing, AFR and other things. There is a reason, why learning engine tuning is best started with cheap, used N/A engine

[bernsaudi]

ok ok..........thanks. ill elaborte a little.
i map cars for gas regularly, and fit piggy back units for altering timing curves and maf to compensate for lpg injection. The more powerful the engine the more gas it needs, and the colder the input gas ends up(can be usefull for lowering intake temperature).
I gather the map sensor for the aby is in the ecu(please correct me if wrong) in which case i would very much like to know if the signal can be intercepted, as (if i am right in thinking) it should affect the timing from the ecu, and by controlling the maf, map and iat i should be able to alter the map and the wgfv actuation while still being able to have the safety routines in place in the ecu. also by gassing the audi i will be able to eliminate a lot of possible 'knock'. The thing is im not gonna get too involved in this unless I can get to alter the setup regularly.

[Jamo]

The boost map and timing map are seperate in the motronic ecu there is no feedback between the two.

[knobstar]

Would it be a complete no-no to just go exclusively gas?

[Jamo]

Only if you have a flashlube system

[GazzaG60]

everybody has to have a go. you never learn otherwise.

id say go VEMS too. i did after a look at a few alternives. glad i did.

had it for around 18mon/2yrs now.

need any help hook me up. follow the advice earlier regarding additional items.

i feel you need.

boost gauge and controller.
egt and wideband

i use defi boost gauge, vems egt and WB02 and turbosmart e-boost 2 controller.

[a4kquattro]

everybody has to have a go. you never learn otherwise.

id say go VEMS too. i did after a look at a few alternives. glad i did.

had it for around 18mon/2yrs now.

need any help hook me up. follow the advice earlier regarding additional items.

i feel you need.

boost gauge and controller.
egt and wideband

i use defi boost gauge, vems egt and WB02 and turbosmart e-boost 2 controller.

honestly as long as you are careful with your changes and follow the advice of those with tuning experience you'll do just fine. It isn't rocket science, there are some simple rules to follow and you'll get gobs of power out of your motor safely.

I like VEMS so much for these cars I'm a dealer for them in the USA. I ship all of my ecus with a reasonably well tuned basemap. The basemap includes a lambda table that shows you what you SHOULD be hitting for lambda values so all you have to do is start at low boost and log your run on spring pressure, check the lambda vs lambda target columns and make the correct changes in the VE table where the readings go too rich or too lean. repeat until values match reasonably well. raise boost a few psi at a time, repeat lamda -> lambda target check via log.

The timing maps I ship are conservative based on what turbo a customer is running, from there the best way to tune timing is on the dyno because its more difficult to dial in on the street compared to fuel tuning. For timing you're shooting for the lowest timing number that produces the maximum power at any given load cell without producing knock. The dyno power feedback helps a lot with this.