signofinfinity

Wolf is a good system but lacks the marketing quality. Halteck, AEM, PFC etc all cater for the Knock and OMP.
It seens that work is needed to bring the wolf up to the expectations. I wouldnt change my wolfy for anything in the world, but alas.... one must figure his way around.
Oil Metering is an issue on the FDs. I hate going to the pump, People staring at my ride, then i come out and top up oil into the tank! some actually said... haha... is it a scooter engine
So, either i go for a mechanical replace ment, or we have to see what to do to get that pump running.... actually the metering part of it.
I could not find a good diag on the factory manual, but i gather, i should find something on the web.However till now all searches proved futile.
It seems i may need to purchase a seperate mechanical pump of an FC....but thats my last resort.....

any info is always welcome!

George

Michael Smith

The FD's uses a stepper motor to control the oil output. If you look on the internet you can see driver kits for stepper motors everywhere they are used in robotics all the time. How it all works is that at idle the motor steps every 1 second at 3000 rpm it steps at say 30 times a second and at 8000 is 80 times a second. Each step is a measured amount of oil. Now this is why the ECU should control the oil is that if you are WOT and have only 2000 rpm you would get 20 steps a second and at high loads this may not be enough.

Michael Smith

signofinfinity

hmmm, but to keep the stock motor and wiring? The problem with the factory manual is that it will not go into the specifics of how to run the inputs and out puts. I mean, how is rpm based sensing introduced to operate the motor in the required steps. I might think that the whole unit will need to be replaced to be wired accordingly..... wolf out put will have no authority on the OMP it seems.....

Michael Smith

Usually you have 4 coils in a stepper motor they fire in pairs moving the armature say 8 deg a pulse now all you need is a pulse to drive it from how about the tacho output. That makes a rpm related oil feed. Now if you could use the pulse width from the injectors and a oscillator that used both the tacho and the Pulsewidth running the oscillator at 100 pulses a second then you have a load related oil feed well thinking about it you don't even need the the tacho feed at all. Just wire the output of the injectors and gate them with a 100 pulse per second oscillator to run the stepper driver. As for finiding out how much oil to inject just look at the testing specs for the older S4 pumps.
Michael Smith

jes

The S4 pump (same as S3 SE) won't interchange physically with the S5 OMP...

What does Wolf do for the "Plug and Play" ECUs? ... or are you using a "Plug and Play"?

signofinfinity

Yeh I am using a Plug N Play.And no, the pump will and must be flanged to get her to fit. Since the Ecu wont control the stock stepper motor for the omp,i will flange it.
I have the external oil adapter, which is basically a fitting between the pump and the chain cover, where it blocks off the oil passage from the engine and supplies oil from a seperate tank. I had in mind of tapsing the fc pump onto this solid aluminium block and use a cable from the throttle body (where the cruise cont cable should go) to operate the pump. It is smaller then the FD omp so it should fit....
thing about wiring is that its quite hard to install wires through the firewall on the fd and DEFINATLY i will never take a drill to her!

Michael Smith

Ok I have done some research on the Oil metering pump. There is more to the electronic OMP than meets the eye first up. It has 4 coils that measure between 16-32 Ohms each(16 for a single coil 32 for a double coil). This is bidirectional stepper motor(it goes backward and forward). It also has a output like a TPS that has a output between 1 and approx 4 Volts this is how the ECU knows how much oil is being put out. Ok deductions here 4 volts is FLAT OUT and 1 Volt is idle(from service manual) the stepper is stepped open for more oil and stepped back for less. The stepper also zeros at turnoff.

The solution: design a stepper driver, comparitor and PWM controller that we can drive drive with the injector output. Say 2 ms = 1.0 volt and 6 ms = 4.0 Volts

I don't have a electronic OMP but thats the Idea.

Regards
Michael Smith

signofinfinity

well, I will start working on the OMP soon enough... I will post the final results. At the moment i have a FC mechannical pump installed.....