Jarid, how would you recommend wiring it up using the 1.02 firmware?

Nope, V1.00.28.

You should update to at least 1.01.16, its a no cost update with several bug fixes. You current map should work fine with 1.01.16 as is.

1.02 adds several features a racer could use such as "stutter" launch control and better alpha-n/speed density mix, not to mention 16X16 3D ignition map.
You will have to partially retune for these features though.

You can use "trigger B", CAM IDX, or Map Select as the triggers.

Each of these has its own pull up to 5v, which means all you need is a switch from one of those sigs to signal ground.
That is one switch and two wires. Thats it.

Thanks, I'll email for the 1.01.16 flash.

As badly as I want to run the 1.02 firmware, I don't want to have to retune the car. It's running well. Maybe over the winter.

So, is it possible to wire the launch control for my firmware, with a momentary switch or do I need a SPDT?

Thanks!

You can use either.

The SPDT will hold you in that state till you physically move the switch, the momentary will hold it there till you release it.

You can wire it in many different ways, enabled by clutch switch, brake switch, any switch or voltage you have off some other circuit, we can figure a way to make it work.

I think what is really throwing me here is that all the momentary switches I can find, including the steering wheel mounted switch 034 sells, are two wire switches, made to complete a circuit. The best I can determine, this type of switch will not work.

The way I read the manual and all the posts, is that you need a three contact switch.

Contact 1: AUXin
Contact 2: +5V
Contact 3: Resistor to ground

The AUXin will then switch between +5v and 0v to the ECU

Do I need to find a three contact momentary? Do they even make such a thing?

Dont get hung up on the 3 terminal switch description.

It can be done just as easily with a 2 terminal switch and a minor alteration of the wiring description.

If and when you are ready to do this, we can tell you how.

Cool. My other though was to use a grounded toggle switch to supply +5v to the AUXin, then add a two contact momentary switch to the AUXin wire to open /close the circuit. Seems a little convoluted thought.

Let me know what you think is the best method to get this wired in. I'd like to get it installed and tested prior to this weekend. For me, a diagram would be the most efficient way to communicate this.

I appreciate the help... as always!

Here is a simple wiring diagram.

Hopefully this will make sense.

Could i use that diagram with a Ic @ 1.02 FW, but use the TRGIDX input instead of the Aux-in?

Not even close to being that complicated with 1.02.

The ECU has the resistor already there for trigIDX, so all you need is to run 2 wires from the ECU (trigIDX and HALL GND) to a N/O switch.

Its that simple.

It does make sense, and it is very helpful. Thanks!

Does the ground have to come from the TPS- or can I pull a chassis ground?

Also, there are no concerns tapping into the TPS wires?

Dont use the chassis for any electrical return (OK fuel pump is alright).
When the car is starting there can be several volts difference between the bat- and the chassis.
When the starter looses its power after the car is started, the load dump can put 100v to the battery, this really moves the bat- from chassis.

This scenario can damage electronics.

No problem using the TPS supply for the aux in circuit, the load is low, and so long as your wiring is good and not frayed, its safe and the launch trigger wont affect the TPS reading.

Great info!
Thanks!

Wired and working correctly!

Thanks for the help... again!