Launch control for Motronic

[prj]

Video title is wrong.
Should be "look what I can do with me knob".



Anyway, this is getting finalized now, and expect it in an ECU near you soon.
Next is flat foot shifting, but that'll take some time, as the code to do that is much more complex.

[S2central.net]

Here is a vid of the prototype - proof that a few lines of code, some PCB tweaks and a variable resistor can create user programmable launch control on a 20yr old ECU.

This is hooked up thru my breakout box just as the easiest way to demonstrate it.

http://www.youtube.com/watch?v=PNS67HaVEPQ

I didn't attempt to film an actual launch yet - pretty tricky to do that on your own with an iphone.

I am shocked by three things -

1. That this has been done at all - pretty cool and I'm sure a world first - Dmitri unlocked a very nice trick in the code that I was able to augment with a h/w mod... We agreed the way it should work as a sub-system and there it is.

2. The actual launch is impressively fast - spins the wheels (winter tyres) on dry tarmac around 0.5bar on a couple of launches circa 4200rpm. Much more boost would create more spin on the same tyres.

3. That S2 central now has a youtube account... what next - bakebook ?

[S2central.net]

well it spins wheels on dry tarmac with 0.5bar at 4250 ish so its plenty enough !

[prj]

I have 0.7 bar at 4900 rpm with my Stage 1+ s/w.

[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.

[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??

[Costash]

[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.

[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.

[Costash]

Wen it is avaible I want this on my ecu!

[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.

[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]

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

[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]

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

As always.