Launch control for Motronic

[S2central.net]

Its OK to be sceptical I suppose - especially after all these years with the mindset that such things cannot be changed - it took someone with a lot of skill in disassembly to reverse engineer. The ECU still holds some secrets for sure but together we are slowly unravelling them.

Lets get this thread back to launch control folks and new threads will appear on the HFM5 conversion in due course !

[A80Avant]

I too fancy the idea of motronic being able to see and be tuned with a larger MAF and have no issues, let alone a good/better consumption than VEMS. BUT one thing that still is a cause of concern for me and one of the reasons for going to VEMS and making the effort of learning how to tune it, is the fact that i dont have to search for the tuner everytime the car doesnt boost right and doesnt pop a code as well, everytime that i need to clean the MAF in order to see the boost im supposed to, everytime there is a minor glitch that the motronic is picking up, is creating problems but doesnt throw a code at you to know where to look for and what to do!

If i were to stick to 1 setup and not change it again, then yes, i would consider doing a custom motronic map with that maf and use it. I would probably also keep VEMS though because the versatility that one gives the other loses, while the accuracy that motronic has, VEMS looses.
if i manage to get VEMS to be as economical as motronic, then ill probably stick with VEMS. In all fairness, im a hobbist tuner, and havent even been on a dyno to check what the best MBT is, so we'll see!

[prj]

You don't have to clean the MAF "every time"...
Once flatfoot shift is done (and optional antilag), I don't see anymore reason to go VEMS on cars under 550hp.

Also, most reasons that car "does not boost right" etc, is because tuners change 6 maps.
I said that before.
If you change 6 maps maybe you will get nice numbers on the dyno and the car will work in a very narrow band of conditions, but it is not the way to tune... all the problems with it not running right, not boosting right etc at high power levels is because of bad calibration.

Anyway, I have a MAF thread open - comment there. Stick to launch control in this thread.

[A80Avant]

sure, i will comment there, its just that the thread took a different turn towards a wider debate (motronic vs aftermarket)

ill start another thread then!

[prj]

sure, i will comment there, its just that the thread took a different turn towards a wider debate (motronic vs aftermarket)

As always.

[Acidburn]

Why do you want to "get rid of the MAF"?
I already have software that runs with the RS4 MAF, which does not max until 600hp.
All this mass-flow hate is silly and caused by misunderstanding.

Also, it is mostly stated for marketing reasons. Look at ME7 cars. They make 800+ hp on Motronic just fine.

If we wanted to run with the rs4 maf which i'd be interested on mine what would be required? would I need to send my ecu to you etc and is the plug on the maf the same?

I like the ideas you've come up with already and it is good people are trying more with the stock motronic as I think there's still more to come out of it

what things do you think you can offer as options or upgrades and what would need you in the car to do and what could be done with just the ecu or chips sent to you.

Thanks

[prj]

Paul can handle everything in the UK.
He has my developments and full support.

[c.homer_80TDI]

i would like a launch control button on the steering wheel preferably a red one (like a NOS button ) i know this means drilling and moding the wheel but how cool would it be?

[prj]

It'll be a a rheostat, rather than a button.
I completed the code for the adjustable control - variable from 1800 rpm to 7200 rpm in 36 rpm increments.

Paul is going to test it soon I think, and record it while he's at it.

[Costash]

Wen it is avaible I want this on my ecu!

[Zoig]

I had a look at the S4 B5 stalk with adjustable switch, I't has a range of 4 steps only. I did not have a multimeter with me, so i dont know the value of those steps. 4 steps seems like really narrow range of adjustment or really big steps of adjustment, either way not ideal solution. Maybe the system inside the stalk could be replaced with a roll to get the same adjustment, but I need to investigate that further.

[S2central.net]

Very quick update........ It works - I have a rough video of the control knob raising the rev limit at standstill. Will post that later today / tonight when I get another moment.

I did the test on chips that were otherwise completely stock.... I did a couple of test launches at ~4500 and it was damn impressive - hope to get some Gmeter runs later in the week with and without.

[Costash]

[Rocco]

Very quick update........ It works - I have a rough video of the control knob raising the rev limit at standstill. Will post that later today / tonight when I get another moment.

I did the test on chips that were otherwise completely stock.... I did a couple of test launches at ~4500 and it was damn impressive - hope to get some Gmeter runs later in the week with and without.

how many boost in the launch Paul??

[S2central.net]

it was about 0.5bar... can't be sure - I was being cautious - and with STOCK s/w except for the launch code... need time to collect some tests this week.