Q: PAC violet wire and diodes

[Lunkan]

I haven´t hooked up my PAC yet, as I´ve put the time to get the car pass emissions. But today I started hooking it up, and now I only have one wire left... the violet.

I´m nut sure how to hook it up, and is it really necessary?

I´d really apreciate some explanation and thoughts about these. And if it must be connected, where´s a good spot? What´s an E-brake (where it´s supposted to as in the instructions).

Thanks in advance
/Andreas

 

[Lunkan]

Hmm, don´t get this with not being able to edit the posts

Ok, I know what the E-brake is and I found out why the violet is needed. But what´s the diodes for? In the instructions it says:

Vehical Electrical ----- [diod] ----|--- [Switch] ----- GND
PAC Violet ----------- [diod] ----^

 

[87gn-newbee]

I think you tie the violet wire into the blue wire with black strip going to your foot brake. I don't use the e-brake to launch so that is what the diodes are for. I'll have to check the wiring today for ya but i think I'm right.

Dan

 

[Lunkan]

Hmm... I´m having a T-brake in my transmission, so I don´t use the foot brake when I launch. And I have replaced the stock shifter with a B&M Console Megashifter too. I guess I have to install a switch instead...

But I still don´t understand what the diods are for. To prevent 12V into the PAC control? And why two of them?

 

[87gn-newbee]

I run a T brake also and this is what Julio told me to do. My violet wire is running to a relay off that relay I run a wire from one of the terminals spliced to the blue w/black stripe wire on the brakes and the other 3 prongs on the relay are grounded. This is so the car doesn't flood with alky when foot braking, street driving/racing. Try e-mailing him if you don't here anything I'll go see what post get grounded and so on.

Not sure why two or what to use them for I didn't have to as per Julio.

Let me know
Dan

 

[Lunkan]

Ok, thanks for the info.

I didn´t mail him, as it´s holliday. I thought it was more likely to get an answer quicker by posting here.

/Andreas

 

[Razor]

Launch assist wire

What the violet wire does is inhibit how much alcohol pressure the pump puts out by reducing its output like 80 percent. Its use is for specifically dropping alcohol while staging the car to launch it.

Actually wont make a difference unless you leave at higher than 10 PSI boost.

To connect it, basically you want to give it a ground signal while staging. How to give a ground signal on the wire.. the sky is the limit. On the TTA since I use the emergency brake, I connect it to the emergency(e-brake) with the two supplied diodes, and when I pull on the handle, the alky is reduced. On the GN's typically a relay is used off the blue wire with stripe coming off the foot brake switch.

On a car with a transbrake, a fabricate a small bracket using a leaf switch and when the shifter is placed into 1 st gear, the switch applies ground to the violet wire..

Just depends on how you want to connect it. Initially I recommend not connecting the wire and making sure the system is operational.

HTH

Julio

 

[Lunkan]

Thanks Julio.

I´m not using the E-brake nor the foot brake. And as I have a Megashifter there´s a small problem. Maybe I could put leafspring switch behind the indicator in the Megashifter console. Hmm.

I´m going with Your suggestion and not connecting it at first.

Thanks for Your answers
/Andreas

 

[Lunkan]

Oh, and Julio... What exactly are the diodes for? Are they needed?

 

[Razor]

Only needed if you use the emergency brake.

You can wire the switch on the transmission using a small braket out of aluminum attache dto the pan rail bolts.

See your not thinking

 

[Lunkan]

Sometimes it just blacks out...

I took it out for a ride yesterday, and my godness it pulls. Even though it´s just the emission chip. No knocks at all. After the emissions tomorrow, I´ll throw in the alky-chip and make some tests and see how it reacts.

Great stuff this is.

/Andreas