I do have several of the modules from the 70's to early 80's that are chrome with different colored heat sinks but have never tested them. I've often wondered if they're were worth anything or just trash them ?
That power transistor is very generic.. Its is an NPN Darlington 400V 10A transistor in a TO3 case, and used in multiple, wide applications including power supplies an audio amplifiers. This part in large quantities of >5K would cost about $2.25 I would surmise certain cheaper Chinese produced ignition modules used a lower voltage/current device, they would work in a lower temperature(<60 degrees C), but would self-destruct if driven hard and heating up.. When the transistor case heats up significantly. its ability to conduct can/will decrease by up to 60%.. Causing it to have secondary breakdown and shorting out...
Note that we have been sourcing audio products and components from the Orient for 25 years, so we have some experience here.. And a few years back I was quoted the Mopar ignition module for $4.25 in lots of 250 pieces, which obviously used a cheaper, lower voltage/current transistor..
I do have several of the modules from the 70's to early 80's that are chrome with different colored heat sinks but have never tested them. I've often wondered if they're were worth anything or just trash them ?
Any part #s stamped on them ?
Let me know
Thanx Scott
1971 Dodge Charger Superbee 2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded Siberian Huskies
Its amazing how times have changed. In the 70s and 80s aftermarket equivalent parts were most times better than OEM. Blue Streak made fantastic quality electronic parts. Now we wish we had parts made to OEM standards from 4 decades ago.
Its amazing how times have changed. In the 70s and 80s aftermarket equivalent parts were most times better than OEM. Blue Streak made fantastic quality electronic parts. Now we wish we had parts made to OEM standards from 4 decades ago.
I stopped using the Mopar style garbage years ago.
Now I plug in the MSD 6AL (older analog, new digital MSD stuff is garbage as well) plugged into a recurved stock distributor. It has the advantages of a rev-limiter and you can plug stuff into it like 2 steps and a timing controller to retard timing with a dial.
The car always starts instantly.
I gave up on all Mopar style ignition systems about 30 years ago when I started racing my car and needed a reliable box with a rev limiter. Whenever I go to a swap meet I pick up an old 6AL every chance I get. Funny part is I'm still running the same one I installed 30 years ago and now I have a few spares on the shelf.
Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
i've gotten a couple 6AL boxes over the years for $5.00 each. they have some real hoakey wiring attached, so i really don't know if they are any good. i bought them primarily to see what is inside. one of these days, i have to hook them up to see if they are good or not, using the test procedure i printed off the MSD site.
I just had another ECU for the Chrysler Electronic Ignition die on me. I have had some last a while, others just a few weeks or months. I know the Orange boxes were famous for being short lived, but I have had aftermarket replacements do no better really. I make sure all properly grounded to vehicle. I have 5 cars that all run this electronic conversion. I hate to think of ditching all of these systems for something else. Does anyone make these units that could be considered reliable?
This may or may not be of help. Installed one on my Charger this summer. So far so good.
That's an interesting article & diagram. I can vouch for the late-model epoxy coils; I've used the '90 F150 coil on a few cars and they all lit off more quickly and ran great. That setup involved an MP distributor, MSD6A, bridged ballast, and 8.0 - 8.8 plug wires. A couple ran 18 degrees initial due to big cams. They didn't have to look stock, just had to reliably haul butt.
Engine masters did show about a few ignition boxes, I believe it was a vintage orange, Chrome and a new one that bough at the local parts store. One was bad the other was good up to about 5 1/2 grand then it failed and the new one worked the best. After that they ran the MSD6a with the best results. I would agree that the 6A is the best option if you are looking for performance. I did this conversion and love it. I would get a new unit because the older ones had components in them that heated up and failed.
In my RoadRunner I did run a couple of different ignition modules, 1 was an MSD 6 that had the Chrysler 4 pin connector the other was a Mopar chrome box. I ran and compared both to 1 another, I preferred the chrome box over the MSD my built wedge motor started easier. Regarding overall response and power both seemed about equal..
Just my $0.02...
Re: Decent Ignition Modules
[Re: Sinitro]
#3072032 08/28/2211:02 AM08/28/2211:02 AM
Don't forget what MSD stands for, Multiple spark discharge. If you ever bench tested one of them you can actually see the multiple sparks in the gap. It happens so fast you really cant see it happening but you can see multiple sparks across the gas as apposed to stock where you get one. And not to mention more spark power. I tested it with a accell super coil and if you increase the gap it will spark to the negative terminal on the coil.
i have been contemplating the HEI conversion, bolting it on the underside of the original distributor. i thought about hiding it in a gutted control box, but thought it might get too warm in there ? any thoughts about this ? the next thought, who is a good manufacturer of quality HEI modules ?
i have been contemplating the HEI conversion, bolting it on the underside of the original distributor. i thought about hiding it in a gutted control box, but thought it might get too warm in there ? any thoughts about this ? the next thought, who is a good manufacturer of quality HEI modules ?
I do have several of the modules from the 70's to early 80's that are chrome with different colored heat sinks but have never tested them. I've often wondered if they're were worth anything or just trash them ?
Any part #s stamped on them ?
Let me know
Thanx Scott
Sorry for the delayed response
2 are Chrome with large aluminum heat sinks anodized red. They are 5 Pinners transistor #'s SII 6205 A 01281 7506 And 5 C 5 ink stamped on the back
the other is a Carquest 4 pin with a smaller gold heatsink Motorola transistor# 793266 9108 0r 8016
