A question to settle a discussion

Budd

I swaped my 72 Dodge 318 to a transistor by doing this. Took a module from a 73 318 van. Not sure about the pin numbers though. Also had to add a different resistor block. Made it a different PU in a hurry. Better low end torque and it cleaned out the carbon etc in about a week. Bob AZ

If you connect a set of points to pin 4 then you have effectively bypassed the electronic ignition and turned it back into a standard point type ignition since pin 4 is what the big transistor actually controls, so you are correct Budd.

Yeah, right, like wer're supposed to believe you have any friends!

beekeep

How can that be when pin # 4 is one of the pins to the control side of the transistor and not directly to a coil connection? The transistor would act like a backwards diode. Pin # 5 is a redundant ground to the distributor pickup, so no point connection there would work.

You're not making sense, Tom.

Budd

Personally, I think it was one of the best systems ever made and should have been adapted to Chrysler computerized cars just to give a less expensive ignition repair. Crank trigger input to a computer run timing program then to the ECU and then output to run the coil.

The computer would be cheaper to replace since it could use a smaller trigger transistor.

Budd

Ace wrote:

At least my "friends" won't sting me in a heartbeat. VBG

Budd

beekeep wrote:

My mistake. I forgot about the screwed up pin out numbering of that ECU and my manual does not number them and it was late and I just counted around the connector. As for pin 4, it needs a voltage to be applied and removed there to trigger the ECU and a set of points directly connected to ground (as most are) would not supply that and therefore have no effect.

That's just my girls kissing me.

beekeep