Will a 911 SC/930 dizzy reluctor trigger a MegaSquirt?

[Tippy]

Just as the title says.

I wonder if it will? I read they need a good, wide flange area to make a nice, strong signal for it.

The TBitz MegaSquirt kit for the SC just uses the factory SC dizzy, correct?

I want to trigger a MSII BTW.

P.S. - Trying to avoid the trigger wheel route if possible due to cost and making my own spending a lot of time indexing it too.

Also, trying to avoid paying over $300 for one that has the crank pulley integrated since that would make up nearly half the cost for me to convert.

[brads911sc]

TBitz kit wont trigger spark. Period. It comes with an ECU which did not even have that feature... Unless your going to change and modify the internals of the ECU.
Buy yourself an MS2 V3.57 or higher or MS3 if you want to effectively work fuel and spark without alot of tedious work.
Just saying..

[Tippy]

Ah thanks, you are right. No ignition control.

IIRC, you use the negative side of the ignition coil (I assume) for MS to figure out RPM and goes from there (TBitz kit configuration).

Lame.

And yes, definitely getting the MS II ver. 3.57. Don't need MS III on our air-cooleds. No need for NOS control, knock-control, two-stage RPM triggering, etc.

Trigger wheel it is.........

[jpnovak]

To answer your question...

Yes, the VR signal in the late dizzy will trigger an MS unit. You need the V3.0 board with the built-in VR conditioner circuit. The other option is to use the Veal conditioner circuit. I suspect you will have to change a few resistor values to get the signal strength and noise filtering just right. The V3.0 board has a built in pot for tuning ignition signal.

Tony's kit triggers off the negative side of the coil using a step down voltage circuit. The advantage to Tony's kit is the injector bung adapters for CIS runners.

MS2 will easily integrate spark. In some cases it is easier than MS3. The reason to go to MS3 has a lot to do with sequential fuel setup and a BUNCH more programmable outputs which are not really needed on a simple 911/930 installation. Control algorithms are nearly the same between the two systems.


btw, MSI can run spark with the Extra Code. To complete the loop Tony's kit (Which I really like) does not come with the extra code. You can easily load the firmware and wire for the extra and Extra features. But if you are going to do this you may want to consider to build your own system.

[Tippy]

I have a C3.2 BTW.

[Tippy]

Just to be clear, you're saying the late SC has a VR sensor in the dizzy?

This will run both fuel and spark without being too weak?

[jpnovak]

Originally Posted by Tippy

Just to be clear, you're saying the late SC has a VR sensor in the dizzy?

In short, yes.

The SC/930 distributor has a wire coil and a reluctor wheel. The output signal looks very similar to any other VR sensor.

Originally Posted by Tippy

This will run both fuel and spark without being too weak?

Not sure what you mean by weak. The processor will have enough computational power to complete the engine management.

If you have a C3.2 Why are you running a distributor trigger? Motronic uses a flywheel trigger.

Unless you mean a C3.0. That is a different story.

[aircooledkiwi]

My $0.02 on this matter......I have a 3.0 SC running on MS2 v3.0 triggered off the reluctor in the stock dizzy. I had to move (bend slightly) the 6 stator pins in the dizzy as close as possible to the rotor to get reliable triggering of the MS2 in cold (below freezing) weather cold starts.
As far as weak or strong goes, it either triggers or it doesn't, and if it does the MS2 will reliably manage fuel and spark no problem.