Could any of the emission solenoid switches be used for electrc aux port activation?
 

Ok, I have an S5. I guess the question I'd really like to ask is if there is an easy way to tell when the solneoid (emissions, on the vacrac) have power. If I remember right they have a constant 12v+ and ECU switched 12v-. Is there a matrix in the FSM that details when each solenoid should have power?

Could any of these solenoids match up to when you would want the aux ports to be open?

I bought a bunch of leds and resistors today. I'm going to wire them up and see when everything does/doesn't have power when driving...

Ok... thanks for the support, this should be worth an archive when the final rightup is done. Looks like I found 2 possible solenoid switches.

Both are only 1/2+ throttle. One above 4krpm, the other above 5250rpmish. In the confusion of documentation I had hooked up the aux port activation to the 5250rpmish solenoid swith. Pure bliss... the car hits 5250 and screams forward to 7k at shift, and waits silently for 5250 again. It does need to be lower however, and I think the 4000 will be used for the aux port switch. The 5250 will be used to activate VDI solenoid switch. Remember these are both only on 1/2+ throttle and seemingly are load-independent.

I'll keep you posted, expect an archivable rightup soon...

if you're talking about the little black box solenoids, they're not all the same. i studied this the other night, but all of them switch with battery power, but the difference is when battery power applied some of them flow from port A to B, and the other ones flow from port A to the air filter. like the pressure regulator solenoid: it flows from A to B w/o 12v and with 12v it flows port A to the air filter. with the solenoids that control VDI and aux. ports w/o 12v it flows port A to the air filter and with 12v it flows port A to B. hope this answers your question.

Actually they are all constant 12v+ with the ignition... they are switched 12v-/ground with the dependence on the ECU... I'm not dealing with the solenoids themselves, rather their switches/ECU determined on/off times...
EDIT: I'm only looking for an alternative to using an RPM switch activate a relay with in switches power to an electronic pump, which activates the aux ports... :D

I'd like to see this if it works. I have a compressor activated by an rpm switch right now, and I wouldn't mind ditching the compressor - it's loud and sounds like a fucking duck call. :doh:

well, since you have an s5, the ecu is doing the switching on of the 6pi and the vdi by itself already as far as i can recall

I don't see what you are trying to figure out?

Amur, I hardly ever see you here... but when I do, i always say how I hardly ever see you here...

Anyhow... It would still require the pump, I'm only trying to find a substitute for the rpm switch. I've found too options that appear to be load-independent. Both are however throttle dependent (around 1/2 throttle at least)- [course you'ld need a properly set tps] and one switches at 4krpm and the other at 5250ish...

Coincidentaly, we may have the same compressor. My setup is identical to silverrotor's old aux setup (same air pump), with the exclusion to how im running my switch set up...

Here is a picture of he pump mounted (not set up) in the engine bay: http://sheepdog.ar2engineering.net/p...s/PICT0028.JPG

I took a few hours tonight and wired it up. I wired it up on accident to the solenoid switch which activates at 5250... It was decent... once it hit the 5250... it screams up to 7k in no time... It definately needs to be activated sooner though.

I think I will use the 4k to activate the pump, and the 5250 to activate a solenoid to open the vdi.

I did find out however that these pumps require a 20amp fuse... They 15 popped about 10 seconds after use.

yes.. it would be if i still had an intact emissions system

Removed BAC, vac rac, cats, ahhh shit, its all removed accept: motor, UIM, LIM, DC, TB, Intake, Exhaust.

EDIT: Technicaly you are correct though-- it was a solenoid that activated the 6ports. Of course I asked which one in an earlier thread and go no answer. Then I checked the FSM which says which one it is.. but it doesnt say if it requies load, at which rpm or what not... So.. I decided I'd find out on my own.

Please take some pics with arrow or something to show us what you mean i'd like this too right now mine are just hooked up to air with a bleed valve gives me a kinda variance in the rpm my ports open that i don't like

On a series five, it's the Brown solenoid plug. Look at the Relationship Chart and OutPut Devices Chart.

3800rpm under load etc.

Series four???? Try the Blue Relief Solenoid for a signal at 3800 rpm. It's there more often than not at 3800. Some complications for using that signal though. Get a bug light on it and watch it while driving and you'll see the complications.

Thanks Hailers... i think this will end up being s5 specific?

I've found solenoid switches to activate the air pump/aux ports at 3800rpm (1/2 throtte+ warm engine +coolant) and another to activate the VDI at 5000 rpm, load independent(throttle dependent). I already have the aux ports wired for the 3800 rpm activation... it does make a noticeable difference. I have one port that is sticking open however (I'm assuming there is no depressurization in the line after the pump shuts off...?)

Anyhow, I will finish the VDI setup on tuesday. I have PLENTY of pictures that I have taken to document *everything* from diagnosing the solenoids to building LED harnesses to tell when what solenoids are activated.

Here are massive amounts of pictures. They aren't commented as of the moment. They have a somewhat logical idea current. Building harness, testing harness, wiring harness to car, showing wear located in cabin, wiring aux port air pump, various other pictures...

http://sheepdog.ar2engineering.net/p...rts1/index.htm

Pick your ground signal from where I have the blue wire.
http://208.62.166.66/guest/pics/91NA/22air pump.JPG

Here is the diagram.
http://208.62.166.66/guest/pics/91NA/e-pump-setup.JPG

Here is one way to mount it:
http://208.62.166.66/guest/pics/91NA/16air pump.JPG

Its a tad late, but very helpful none-the-less

i'm sorry to bring this back up again, but did you ever write anything up Kenteth? this info would really be useful to me, especially how you wired up the LEDs and everything to test operation (i'm sure i could figure it out, just wondering how you did it).

also, why could you not use the 6pi and VDI solenoids and signals? were you using an S4 ECU?

thanks

This thread interests me, I'm looking for good ways to activate the VDI/AUX ports, as my stock ECU will be hitting the trashcan in the neer future.

SummitRacing sells a RPM switching device.

The Relief Solenoid (Blue connector) gets a ground at 3800 rpm without load.

The Six Ports Solenoid (Brown) uses load/rpm to activate.

The series five FSM shows when/where/and how for most solenoids. In the Fuel Section.

For a while I used the Relief Solenoid in combination with the airpump out line to activate my aux ports on my 86 n/a. Finally bought the SUMMITRACING device to do the same in lieu of the Relief Solenoid signal.