Well, ok here is a pretty diagram I made.....

It shows how to attach the Summit Racing RPM Switch P/N SUM-830449.

http://phatg20.net/media/vvl.jpg

Here is the
PDF Version (http://phatg20.net/media/vvl.pdf)

This is much better than other info I've seen but I still don't understand it because I do not understand how a relay works.

Does it have to be a 2 amp relay for this to work and not destroy my rpm switches?

Where is the grey wire? That wire does get used unlike the MSD switches right? Are you taking the ground wire from the solenoid and just connecting it to the block that way you do not use the grey wire?

I am using two Summit Racing switches so I would need a total of four relays correct?

Or is it just one relay per rpm switch box and the yellow wire connects to post 1 the red wire is post 2 grey wire is post 3 and post 5 is then connected to the solenoid and the the extra wire from the solenoid is then simply connected to the block completing the circuit?

Sorry for all the questions but I am very confused.

Real pictures would realy help me out right now. Thanks.

a relay is basicly a switch. the relay is switched on or off by power being sent to it..........or a ground being completed depending on how it is wired.

a relay is basicly a switch. the relay is switched on or off by power being sent to it..........or a ground being completed depending on how it is wired.

Just what he said. Add to that. A relay takes all the "beating". If you turn a switch on and off enough times, it's going to burn out. The more current(amps) a relay is rated. The less chances of it burning out. I always use 30A relays. Have yet to burn one so far.

You can use 1 relay for 1 switch. So, 2 relays=2 switches. Or if you know what you're doing, you can use just 1 relay for 2 switches.

Grey, forgot what that wires for.

I know how a relay works now. I am using nissan 12v relays.

Ok so what happened to the grey wire in the diagram?

I just put the grey wire on the number 5 post. The number 3 post goes to the solenoid and then I grounded the solenoid on the block. Everyting else is the same as the diagram.

Is what I did correct? I'm not sure the vvl is kicking in but the green light goes on, on the summit switches and I can hear the relays clicking but that doesn't mean the solenoids are getting any power. The car is quick but I think it should be pulling much harder.

Sooooo yeah, I checked and double checked with my voltmeter and my vvl is not working. I Even wired it two other diferent ways and it still doesn't work so either this diagram is wrong or I've done something wrong.

EDIT: This diagram is incorrect I'll do a wright up later today explaining the correct way to do this.

OK here is the correct way to wire this in.

The only part off the diagram that is correct is where it shows the Summit switch and the way it is wired to the top left. Where he went wrong is on the other part of the diagram to the right of the diagram of the actual switch. It says "to switched 12 Volts" above it. That is incorrect because that would be wiring it back to the Summit Switch. The summit switches act as grounds and do not put out any voltage. In other words you would be grounding ground and no voltage means no vvl.

To correct for this simply run a positive 12V wire straight to the solenoid, then on the other solenoid wire goes to one of the terminals on the relay, post 3. Then on the last relay post, (post 5), connect a wire to it. From there it goes directly to the chassis to be used as a ground. Do not connect it to the summit switch even though the summit switch is a ground. The reason I say this is because if you did do it that way you would be defeating the reason for using a relay in the first place! Grey wire is not used.

Repeat the process for the other solenoid, relay, and the other summit switch if you are using two summit switches.

If you are only using one summit switch you will only need one relay and is the same process as stated above. Wire another 12V positive directly to the solenoid, the to and the other wire from the solenoid goes to post 3 along with the other wire you just connected to it. Relay post 5 is used as a chassis ground. Once again the grey wire is not used.

is u guy mean i need a special switcher to add in to de wiring conection between computer box to rpm meter?
I hav try plug in a Omori rpm meter to my ve but it doesnt work, now i try Auto Gauge to see will it work.
basically i think ve is using digital or data signal & most of it is using analog.
I not sure im corect but i *** guess cos im a electronic nut.
Pls correct me if i wrong n show me a right way to install RPM gauge into my ve.
if not i think de best way is to get RSM meter sure it work.....

I used the white wire from the summit switches and conected them to pin number 2 on the ECU. Pin number 2 is located on the top row six spaces to the left of the bolt, and the wire is blue with a black stripe.

I just mocked this up encase anyone wants to use a dist block which you can get at home depot. Any questions or problems, feel free to ask!


http://i113.photobucket.com/albums/n229/Dudeman258/IM1.jpg

Ok, to clear some confusion.

As for the "switched 12v" I didnt go directly to the battery. I used a "Switched" source that would be on only when the ignition is on. It is just a 12v source.

Also not all relays are the same. The "blue" nissan relays have an open circuit when there is no power. Some have closed with no power.

If you read the instructions for the sumit box (http://static.summitracing.com/global/images/instructions/sum-830449-1.pdf) It states that "Gray wire will open to ground when rpm is reached" which means it with break the circuit when the rpm is reached. It also states that the "Yellow wire will close when the rpm is reached." Which is what you want.

Ground one side of the solonoid to the block.

The summit box is only "switches" the relay when the rpm is achived. The relay then allows power to pass to the solonoid.

On the top left of the diagram, when curent flows between 1 & 2 of the relay the relay will close (3&4) and let power go directly to the solonoid.