Hello again!
I got my analogue multimeter and it measured 8.2 volt on the positive side of the coil during idle. I am satisfied with that and therefore I am gonna keep the ballast resistor. The car is also running great.
However, I do wonder: Would it make any difference, performance wise...
Many thanks!
So according to this it would do no harm to the points and therefore it would be ok to skip the ballast resistor?
I will do the test as soon as I get my analog multimeter that I bought on ebay.
This is great and easy to overview!
Can you post one with 12v, 1.5 ohms loom/wiring and 1.4 ohms coil and no ballast? (Perhaps, you already did this and I apologize if I missed it).
It seems like voltage to point is the same (0.1v)? What would be the maximum volt at coil and still have...
Thanks for all the support. I have two more questions:
According to MSD, the resistance is suppose to increase in the 0.7 ballast resistor (some sources say up to 1.4 ohms) when the engine is hot. How does that effect my voltage? (Perhaps you already explained this and I did not quite get it?)...
Thanks, I will do that test tomorrow.
I should also mention that there were a 1.4 ohms coil and a 0.7 ballast resistor when I bought the car. When the car died that time on the highway (4 years after I bought it) I changed to a 0.7 MSD coil and a 0.7 resistor. It worked fine for 3 more years...
What can I say; I am impressed by your knowledge and I have read all posts carefully.
To sum up my problem: car shakes, dies and impossible to start on a sunny day. I change MSD 0.7 coil + 0.7 ballast resistor to a new MSD 0.7 coil and 0.7 ballast resistor, change condenser and the car starts...
I use oldfashioned points. That is why I'm so concerned about the ballast or not. 9 voltage on positive on coil when running and 5.7 with engine off and key on is ok regarding to Mallory, but I trust you guys more. What do you all think?
1. My mistake, I just changed it to voltage.
2. I´m not sure what you mean. Ignition coil resistance is 1.4 and ballast resistor is 0.7
3. Yes, and I´m using a digital multimeter.
I probably have a resistance wire/loom resistance that reduce the voltage.
Skip the ballast resistor?
Thanks for the clarification.
However, the results that I mentioned before are taken during idle:
Accel 8140 super stock with resistor= 8 voltage on coil positive.
Accel 8140 super stock without resistor= 9 voltage on coil positive.
Done with the key on and engine off:
Accel 8140 super...
Thanks, I have to drive more to be certain. It did not get hot yesterday when I was testing with different coil. I wonder: How can a coil with 1.4 resistance result in higher voltage than a coil with 0.7 resistance? Should it not be the opposite?
Thanks! I will remove the MSD coil. It was actually MSD electronic service that told me that if it is 9 volts on the positive side on the coil I´m good, but if it is less , I would remove the resistor.
Here are the results from todays test during idle:
MSD Blaster 2 (0.7 ohms) with resistor=...
I am at the garage right now. I measured the voltage on the positive on the coil. It is only 6 voltage with ballast and 7 without. This was strange, but perhaps why the car was shaking and finally died the other day. I must have bad wires? Is the coil bad? There is something stealing power? It...
Hello again!
Which is the best ignition coil for a Mallory 27 series (dual points)? I´m already using a MSD Blaster 2 with external ballast resistor, but I´m gonna buy an extra ignition coil/ballast resistor and keep it in the toolbag.
I was tuning the carburetor (during idle) yesterday and I...
I must admit that when I installed the new msd coil and ballast resistor recently, I connected the wires wrong, ie. resistance wire to the negative side of the coil and the cable from the distributor to the positive side. The car was impossible to start, but the question is whether it could have...
This is a great forum!
OK, I´m gonna stick to my Mallory distributor, original resistance wire, MSD blaster 2 coil and the ballast resistor. It might have been a bad condenser (out of the box) that killed my car that sunny day. I also noticed that I installed the condenser bracket upside down...