coil for 65 1098

[HAN8L1965]

I am having coil problems, got one fro auto zone, all it did was get hot, put the original in and it started right up. Auto Zone said
original was weak. Ordered one from VB # 8-627. would not start got very hot again original started afterward. What gives?

Mark

 

[HAN8L1965]

further part of question, I do not currently use a resistor?

 

[Keoke]

further part of question, I do not currently use a resistor?

Hi If your original coil did not use a resistor and works on the car. I suggest you make sure you get an unballasted coil for the car and try it out. Checking the type coils you have on hand can be done with an OHM Meter. An unballasted coil [like your original] will have a nominal DC resistance of about 3 OHMS while a ballasted one [possibly like the replacements] will read close to half that value.---Fwiw--Keoke

 

[dklawson]

To add to Keoke's comments, be sure to mark and disconnect the low tension wires from the coil when you make the resistance measurements. You don't want anything else on the circuit altering your resistance measurements.

In '65 your car would almost certainly have used a standard, 3 ohm coil. IF the parts store sold you a coil for ballast ignition, and/or likewise if VB accidentally sent a ballast ignition coil, it would be passing too much current and would get hot. However, I'm not sure why this would prevent the car from starting. Usually what it does is cause the premature death of ignition components.

I looked at the listing at VB and it says that the 8-627 is a screw-on coil which would certainly mean it's a standard 3-ohm unit. Now for a question, since it's a screw on type coil, are the low tension terminals still marked SW and CB or has that changed to (+) and (-)?

 

[Jim_Gruber]

Let's all remember that a '65 is Positive Ground. First of all was it hooked up correctly to begin with.

 

[dklawson]

That's where I was going with the CB and SW question. You're right, I should have included the question about the car's ground connections at the same time.

 

[Keoke]

Hi DK, While I find no fault with installing coils the correct way around. Should the coil be instAlled in a positive ground car with the terminals reversed . It should not cause excessive heating of the coil nor failure of the engine to start. The stress on the secondary components ; Rotor, Points and high tension leads will be higher now that the there is a positive pulse at the plugs rather than the conventional more easily broken down negative pulse.--Keoke

 

[HAN8L1965]

the coil is marked plus, minus. I do not think I have addressed the positive ground issue. Need a little background as to proper setup. I am running this off my Honda Accord battery.

Mark

 

[Bugeye58]

Mark, if it's positive ground, the + terminal on the coil goes to the distributor, white wire with black stripe. The solid white wire goes to the - terminal on the coil. The + terminal of the battery will be the ground terminal, - (negative) cable to starter solenoid.
Jeff

 

[Jim_Gruber]

Where does the + terminal on the battery hook up to. In a positive Ground Car I believe it goes to the firewall. Bugy my '68 Sprite is a negative ground car however DPO connected up the '66 1098 Engine in Bugsy as Positive Ground. Car would start and run on ether sprayed in carbs but since ground was connected backwards fuel pump would not work. After weeks of cogitation on the subject and staring at the engine compartment the llght bulb came on and I turned the battery around. Voila, engine started right up. Other than changing polarity on the coil no issues at all.

 

[jlaird]

In my opinion, unless you are doing a show car make the wireing standard, ie negative ground. A lot fewer problems for you and the next guy.

 

[Sarastro]

In my opinion, unless you are doing a show car make the wireing standard, ie negative ground. A lot fewer problems for you and the next guy.

Yes--and if some 17-year-old tow-truck driver ever tries to jump-start it, there's a lot less chance he'll get the cables hooked up backwards.

 

[HAN8L1965]

so that being said are you just revering the wiring throughout the dash, lights, fuel pump etc.? The engine is the easy part.

Mark

 

[Bugeye58]

Mark, half of my cars are positive ground, and will remain that way. I wouldn't let a tow truck driver near my car with a set of jumper cables.
Your fuel pump may be dual polarity, it may not. If it isn't, you'll either have to replace it, or modify it. The tach will need to be modified, but the rest of the systems don't care what the polarity is.
Jeff