I'm not familiar with relays. I need to be able to turn off my trailing coils with a switch. Can someone tell me which relay's to use? Is the one in the picture the right one?


From my understanding, I'll need two relays on the 3rd gen since it has two signal wires for the trailing. Basically what I do is setup the relay to normally closed. When you hit the switch, it'll activate the relay into open so that the signal doesn't get into the coil.

My main question here is......... How to hook up the relays? A written out diagram would be great.
Thanks!!!

 

Actually, it would be better to cut 12v power to the relays instead of the timing signal. Put the relay in-line with the 12v power to the trailing, feed the relay's coil 12v, then put a switch in the ground for the coil. Done deal.

Go here for more info on relays and how to use them -

http://www.the12volt.com/relays/relays.asp

Most any automotive relay will work - the pic you posted is just a standard relay with an MSD sticker on the side .

Dale

 

Tell me if this is right.





Top or center are hooked to trailing power wire. 87 87a
Left most terminal is is hooked to my horn button 86
Right most terminal is Ground 85
Bottom is to 12V from the battery 30


Is this correct?

 

whoops...

 

Alright, I was told that I'm supposed to use 87a since I'm wanting to turn off power to the coils.

Does this sound right?

 

what does turning off the trailings do? Less chance of knock or something?

 

Here, I made a diagram. Does this look right?



Remember, I only want the trailing off while I'm holding down the horn button.

 

That would work. With the horn button held down, the relay would energize, opening the circuit and disabling the coils.

Big question is - why?

Dale

 

Awesome, thanks for the help.

You ask why........... Can you say Wheels Up!

 

Pre-spool?

 

Not many people know this but............ this is the only way to create boost off the line (With a rotary and without a computer that supports it).

Using just a two step box won't work with a rotary. You have to turn off the trailing coils while using the 2 step.

 

that looks right if 30 and 87a are closed when not powered by horn button! you need to determin if your going to break positive signal or if you break grnd. signal. coils might be hot all the time and fire on grnd. signal? i dont know witch way your computer works. injectors fire off grnd. sig.

 

just so we are on the same page the 30 pin that says 12v battery is the 12v signal going to each trailing

the 86 terminal and 85, one grnd, one pos. you will need to switch one of them on to active(turn off coils) the relay

 

nm

 

I don't have a diagram in front of me, but I believe the horn button will send a GND and energize the "sound"

If that's the case, you'd hook 85 to 12V...look at the diagram or post it.

be careful because the coils get there 12V from the same line...I know you aren't running stock coils but generally they power together and the ignitor GNDs them to fire.

Maybe look into breaking GND from the ignitor with two relays...then they'll never fire when the horn is pressed.



where 87A goes to the ignitor



edit to see them together

 

nm

 

Can't I just snip the 12v wires going to the trailing coils and run the trailing coils to the 12v pin on the relay?

You guys are confusing the hell out of me now.

I run the stock trailing coils and TII leading coil if that matters. Also, I've got an aftermarket steering wheel and buttons if that matters.

 

If you want to do it that way, this is how I would wire it.



isolate the trailing 12V to another swithed 12V source (87A and 85), and GND the horn button, and connect to 86.

Basically when current flows thru the coil (85 and 86) it creates an electro-magnetic field and pulls open the switch (87A and 30...closing 87 and 30). It's just an automated switch.

You have to pass the 12V power thru the switch to the relays...and then take it away with the horn energizing the coil.

Good Luck

 

So, let me get this right before I wire it up.

87A and 85 get wired up to the battery.

30 gets wires to the trailing 12v source

86 hooks up to the horn button.

Does nothing get hooked to 87?

Where is the ground?



Thanks dude!

 

I wouldn't go straight to the battery for 87A and 85...fused switched ignition source.

to tell you the truth...I think I'd want 30 and 85 to switched 12V and 87A to ign coils power wire. (wrote that early this morning...and from memory.

the GND is thru the horn button.



sorry for the confusion...should be clear as mud now

 

i think we need alittle technical background on what your doing, because i might want to try this. How exactly do you go about using it. obviously we have the "how to do it".

and im a moron and now have to search for "two-step" to see what that is.

 

This is more for drag racing. It lets you create boost of the line or scare t he crap out of people. Ever been to a drag race with turbo cars? When they're staged, you'll hear enormous popping sounds coming from the cars and lots of flames. They're on a two step.

I'll get some video when I hook it up. I'll see if I can knock some windows out.

 

Your neighbors are going to love that ****

 

ah found two steps. i think i get the logic now. it gets a singal from the clutch to use one rpm limit, which you also want to use a relay to also turn off the trailing ignition. correct? so running it off the same siginal the two step gets would work?

 

why would you run a seperate 12v source to the coils??? just use the relay as an interuput of the existing power wire going to the coil

snip it run one side of that circuit to the 30 terminal and the other side of it to the 87a terminal. it will fire the coils normaly when the relay is deenergized

the horn does supply grnd like dublup said i belive also. so put that horn contact signal to the

then you will need to decide if the controll will be on the power side or the ground. if using the horn grnd as the switching signal, put that horn ground signal to the 80 terminal and run a fused (10amp) source to the 85 terminal.