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Controlling brake line lock with launch control

Posted: Sun Dec 08, 2019 8:05 am
by TRN
Hi guys,

Has anyone used an electric brake line lock together with the launch control system?

In our new car (S100) we'll be implementing the launch control, mostly for accurate startline rpm. The way I've previously wired this up was;
-DTA pin - steering wheel LC pushbutton - clutch pressure switch - ground.
So ECU holds startline rpm while button is pressed, driver aggresively releases clutch pedal, car goes vroom.

Now for our new car we'd also like to incorporate an electric brake line lock valve (anti-roll valve) that temporarily holds brake pressure after having applied the brake pedal. We'd like to prevent the car from rolling and being able to preload the drivetrain (similar to drag racing, but this car will be doing offroad heats with sensor-monitored standing starts).

The low-tech way I've thought of was simply using two clutch switches and a 4-pin pushbutton to simply have a separate wiring loop control the relay for the line lock, but this feels counter-intuitive.
Any way to do this using the DTA?

thank you for any input!

Re: Controlling brake line lock with launch control

Posted: Sun Dec 08, 2019 8:18 am
by katana
KISS - sounds about right to me! I assume you aren't required to 'roll into stage' As this would be a pain with connected systems!

Re: Controlling brake line lock with launch control

Posted: Sun Dec 08, 2019 12:47 pm
by stevieturbo
Surely a single ground based switch can cover it all ? with relays if you feel the current draw may be too much for the switch ?

But if you wire it all so everything is ground triggered....one ground trigger via a clutch pedal switch would suffice.

Re: Controlling brake line lock with launch control

Posted: Sun Jan 05, 2020 4:50 am
by TRN
thanks guys! we'll go with the kiss method ;)