Magnum distributor and EFI (Phord Mass Air)

[Grundy]

Does anyone know anything about magnum distributors? Can they be used on old small blocks? Does anyone know anything about the output signal or where to get that kind of information?

Thank you,

[Chryco Psycho]

they will fit , they just produce a hall effect signal & you need a computer to generate the grond for the coil/s & create the timing curve

[Grundy]

That sounds good to me. My next question off of that, based on the stator inside the dizzy, it seems that one of the tabs is larger, which means to me that you can distinguish the #1 cylider. Is that correct?

[Chryco Psycho]

presumably

[Grundy]

In my ongoing hunt to figure out the easiest and cheapest way (for all us EFI wannabe's) to get the TFI distributor setup working on our mopars, I found this article about hall effect sensors.

www.wellsmfgcorp.com/pdf/Counterpoint3_1.pdf

The hard part is getting real information on these magnum distributors. You can't even buy one from the net. The other part is figuring out the voltage outputs to make the chrysler unit act like the ford unit. Once that's done, I can see being able to wire right into the ford maf system.

[ntstlgl1970]

Here is some general info, but the distributor is just a sync signal on a crank trigger engine. I still think it is easier to adapt the ford guts into a chrysler distributor or adapt a chrysler distributor shaft into a ford TFI distributor body welded to a chrysler lower distributor body than reverse engineer the chrysler stuff to output what the ford TFI module is looking for. There is tons of info on how the ford TFI system works at www.msefi.com.

from a 95 318 dakota manual:

LOCATION
The camshaft position sensor is located in the distributor on all engines.

DESCRIPTION
The sensor contains a hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects a rotating pulse ring (shutter) on the distributor shaft. The pulse ring rotates 180 degrees through the sync signal generator. Its signal is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders.

OPERATION
When the leading edge of the pulse ring (shutter) enters the sync signal generator, the following occurs: The interruption of magnetic field causes the voltage to switch high resulting in a sync signal of approximately 5 volts .

When the trailing edge of the pulse ring (shutter) leaves the sync signal generator, the change of the magnetic field causes the sync signal voltage to switch low to 0 volts .

CIRCUIT OPERATION
The camshaft position sensor is located internal to the distributor on all engine applications.

The Powertrain Control Module (PCM) supplies 5 Volts to the camshaft position sensor on circuit K6. Circuit K6 connects to cavity A17 of the PCM.

The PCM receives the camshaft position sensor signal on circuit K44. Circuit K44 connects to cavity A18 of the PCM.

The PCM provides a ground for the camshaft position sensor (circuit K44) through circuit K4. Circuit K4 connects to cavity A4 of the PCM connector.