Mike Simard

Hmm. The aluminum flywheel that holds the toothed ring is probably getting a bit larger as it warms. It seems to have avery small gap as designed.
I wonder if it could be helpful to space the sensor further away?

It's a new non Bosch sensor. I have a real Bosch brand one on the way now.

wildguy

This is correct. You find these at those "geeky" electronic stores. This is assuming your using the M48P and not an M800.

Guy

Mike Simard

yes, it's an M48P and has an IEX.

It would be nice to find quality resistors for this kind of stuff. Do you have any sources? When I look in geeky electronics suppliers all I see is a myriad of light duty stuff. Aren't there robust heavy duty resistors out there?

wildguy

The Motec, any many others, do not work well or do shut off in low voltage situations.

Mike,
Do add the resistor, doesn't hurt, and check grounds.

GregBBRD

We had problems with the Bosch sensors, on the factory race cars, if they got closer than .8mm. I try to set my sensors to a minimum distance of 1.0mm.

Seems like all the models of Porsche (through 1998) had an adjustable bracket to change this dimension...except the 928.

wildguy

No, these are those little fragile looking ones you see on PC boards.
I would crimp it with a glue crimp and glue shrink too. That way vibrations won't hurt it.
I sell sensors if you need any others. I only use and sell what is proven to work.
I can send you a resistor and special crimp if you like. Free.

wildguy

resistor info
http://www.the12volt.com/resistors/resistors.asp

Mike Simard

Is there any such thing as a hall sensor that has the same dimensions as the stock S4 sensor? Would you like to share your business info? I'd buy stuff from you if possible.

Lizard928

If the problem is that the gap is closing up, the 1k ohm resister (1/4watt is fine) will fix that problem.

928er

so here is what I remember. The factory timing sensor is the 60 -2 variety. I would have to see what my crip is set for to be sure. The number 62 sticks in my head for some reason. if you are using the regular ignition outputs on the m48 pro you can use either the rising edge or the falling edge signal. However you can only use one of them for the eix ignition expander. If you use the other weirdness can ensue. The problem is that I don't remember which one it is.

I had some mystery cutout's and the data logging was showing a ref error. What is the datalogging showing?

BC

If the resistor does not work, can you make the crank
Trigger a hall sensor instead of VR? VR seems to have more issues, and it usually involves strange voltages that affects the ECUs

BC

http://www.diyautotune.com/catalog/h...sor-p-479.html

john gill

The stock s4 flywheel is 60 teeth in total with 2 missing , falling edge is usual parrmeter to set.

Mike Simard

That would be great to have a hall sensor for the crank if one were available with the same dimensions. The common ones seem to be too big though.

wildguy

FYI. Ref trigger edge has nothing to do with IEX, the IEX is on the output side of the ecu, not the input. IEX mode is fixed and the trigger edge is not adjustable.