Launch control for Motronic

[Rocco]

so the launch control could be variable ,and we can do it easily whem sitting on the car?

[prj]

Okay, so spent the better part of the evening soldering.
The good news is - it works in my car as well now
Now I just need to get something to record a decent video with...

Have not mounted the knob yet, but will mount it in the coin tray tomorrow, so I don't touch it accidentally when not needed.

[S2central.net]

@Ross - you will kak your pants when you try VLC... honestly... its nothing like a normal launch by holding revs at 4k or 5k as you have no boost built up. Holding at WOT with VLC allows the turbo to build plenty enough boost and you just dial in the amount of revs needed for some wheelspin as you take off like the proverbial scalded cat - settings will depend a bit on personal tastes, tyre sizes and wet/dry weather. Thats essentially why we made it variable though - launch control for all seasons

[prj]

I think what he's getting at, it what is the difference between holding 5,000rpm with your foot vs with this function? If I hold 5,000 rpm in my car there's pretty much zero boost so I assume something is different, 0.7bar is quite alot!

Exactly. 0.7 bar vs. -0.3 bar. 1 bar difference.
You can get a bit more by playing with the throttle, but not as much.

Plus, it's just easier to launch by holding it WOT.

[Ross]

I think what he's getting at, it what is the difference between holding 5,000rpm with your foot vs with this function? If I hold 5,000 rpm in my car there's pretty much zero boost so I assume something is different, 0.7bar is quite alot!

[prj]

Serious question, what's the benefit w/o anti-lag? I can infinitely adjust the throttle with my foot w/o this.

I have written this many times in this thread:
It builds 0.7 bar boost on my car, so it does have an antilag function as well.

Good luck building any boost while playing with your throttle, for the reason gadu stated above.

[gedu]

The difference is WOT throttle body with this and not that much opened without it. Difference being more boost built up on the line.

[PRA4WX]

Serious question, what's the benefit w/o anti-lag? I can infinitely adjust the throttle with my foot w/o this.

[prj]

My new knobs have finally arrived.
Lots of soldering to do now, but I will surely be able to demonstrate you the functions of my knob until the end of the week.

Now in all seriousness - I have enough for ten kits.
I guess 2m of cable should be enough per kit.

Basically you will send your ECU to Paul or myself (whichever is closer), and then you will get back an ECU that has a 3.5mm socket poking out.
You will also get a 2 metre cord with a 3.5mm plug on one end and the knob on the other, so you'll be able to mount the knob anywhere you wish.
The pots are panel mount and include mounting nuts, so it is possible to make a small hole pretty much anywhere in the trim and fit it there.

In the future, it'll be possible to get flat foot shifting as an upgrade, and that'll likely be DIY, since all the soldering work is already done in the ECU.

[Dan]

I quite like the way it looks there

Anyway, glad to hear it goes to 11. I had to take an amp back when I realised it only went to 10.

[S2central.net]

To prove that I think a centre console switch is a bit unsubtle - I did it on mine. See attached pic.

I definitely think that a location near the handbrake is better as its closer to the driver and much less visible. That and there is a whole world of dremel action required to modify a B3/B4 switch blank.

I have ~1m cable runs made up already - they are plenty long enough for numerous locations of user preference.

PS - I just added that 'g' legend on for fun on the computer... in case anyone wondered.

[prj]

Knob did not arrive yet

The ones I ordered are soft-touch black and the stripe is red.
Should fit well with our cars.

Does not really matter where to fit it. It has a nut to tighten it down to any panel, just need a small hole.

[Acidburn]

cheers, hmmm might be able to use that on the urq inside a spare headlight dimmer switch casing

[prj]

I am going to show you my knob this weekend.
Or at least as soon as the bunch of electronics stuff I ordered arrives.

[Bram]

Cannibalise an iPhone 4 and use the antennae to build a palm sweat detector for the steering wheel.

Make use of antenna-gate