Austarion

Hey guys, need some help here.
I am fitting a VR4 into my Cordia...yes I know...shame on me...

Anyway.....

I need an ignition and fuel map...can anyone help?
Also...the crank angle sensor...what wires go where? VR4 has 4...Wolf only needs 3...me so confused..

Any help would be appreciated

VR4 ECU only has one pin for the crank angle sensor, pin 21

See vfaq.com for more info on that, so I imagine that the other 3 are just power. Two of which would be grounds. Would make things a lot easier if you find someone with a VR4, and monitor the voltage/resistance to see what each one does.

5V=power
0V to 5V=signal
0 ohms 0V=earth

Also nzmmc.co.nz forums, heaps of EVO and VR4 owners, someone there might know the connections for the sensor. I've run in to a couple of people in there running 4G63 4WD Cordias for rally etc.

Although hopefully someone here who runs a similar setup knows the answer properly, just putting in a backup solution if nobody else replies.

the VR4 CAS has a optical setup, with 2 signal outputs and +V and a 0V.
the +V supply can be anything from +5V to +12V. the wolf will have a +v supply wire to the CAS, use the TEMP 0V for the CAS 0V. the VR4 CAS also has an inbuilt inverting amplifier, which turns the signal into positive going pulses, as the timing disk slots go past the read head. which is what the wolf will want.
now for the bad news.
unless you have the latest version wolf firmware fitted, which may know how to read the weird VR4 timing signal, you will need a new timing disk.
best idea, ring Steve at Wolf, tell him what you have got, and get him to suggest the best solution. mine was to make a new timing disk, to suite the old Wolf interface that i have. the solution may be easier now. let us know.
Dave.

so r u saying to put a wolf 3d version 4 onto vr4 motor u need to modify the crank angle sensor? what else?

the CAS is the only tricky bit, every thing else is a direct hookup.
twin coils, sequential injection, etc. what version of Wolf are you using?
i have a cal file for the VR4 water temp sensor for the Wolf.
Dave.

VR4 CAS connects to pin 21, 22, 104 (may be grounded) and is spliced into 102 and 107. Well, according to my wiring diagram anyway.

as I said...V4


V4 runs 27, 28 and 30, which are input trigger ground, input trigger signal and input trigger +5v

The VR4 crank trigger unit does have 4 wires Red = power, Black = earth Yellow = Clyinder firing , Blue= clyinder reset. If you look at the disc inside there are four slots on the outer edge= clyinder firing the two slots on the inner area ( one long one short) is trigger reference for coil firing duel coils. If you use the wolf you will need to use a pull up resistor on each trigger wires other wise the wolf V4 wont see the signal.

8)

Thanks...now to find a resistor....

Dont suppose you could let me have a copy of your maps??
:D

does the VR4 use a distributor as the crank angle or an actual sensor on the crank?

I have maps for a sohc, MPI conversion with Version 4 wolf if that helps. tuned by SST in Perth

ASHLY

My 4G63 DOHC Galant doesn't even have a distributor, so I imagine there will be an actual sensor :)

What does a Wolf v4 set you back these days?

Barney - uses a sensor on one of the cams, on the back of the head.

Well, i say back of the head, when its mounted in a starion, like it should be! :D