What ohm coil?

[Anonymous]

Does the ohm rating really matter with the Pertronix coil and Igniter 1? What does everyone run, 1.5 or 3 ohm?

 

[james singleton]

BIGJHOOV, I recently purchased a 3.0ohm IGNITOR coil from a local speed shop. After the purchase I read somewhere that you should not be using a 3.0ohm coil unless you remove the ballast, and or resistence wire running to the coil. The article said that a 1.5ohm coil, which is rated for racing (which I am not concerned with), would work with the resistence wire and/or ballast. So I took back the 3.0ohm coil and exchanged it for a 1.5ohm coil. I have not installed the coil yet, and plan on buying an IGNITOR ignition system in the near future to replace my points. Since I haven't installed either the new coil or the IGNITOR ignition yet I can't comment, but I thought I would pass along something that I had read somewhere!

 

[fb71]

I run an Iggy II and Flamethrower II (1.5 ohm) off of straight 12volts, no trouble. Call Pertronics, and ask them if the Iggy I's output transistor can tolerate the current draw of a 1.5 ohm at 12 volts, or if you should stick with a 3 ohm.

 

[addo]

I'm pretty sure you can run a stock Ford coil with the Ptx I. The main things to watch are that the module gets its recommended voltage (probably 12V but check the instructions), and the coil gets its correct voltage (likely to be less than 12V).

 

[kirkallen143]

Jerry,
Go with the higher ohm coil, if you have a choice. The lower ohm coils intended for racing will burn up faster, because they get hotter with less resistence. Just get the ones they offer at the local auto parts store, like Accel super stock (the yellow one), it works with breaker-less ignitions. And, keep the ballast to the coil (big/thick pink wire to pos. side of coil).

Kirk

 

[fb71]

typically, race coils are less than 1 ohm, usually around 0.6 ohm. 1.5 isn't that low, and usually spec'd as an "electronic ignition" coil, whereas the 3 ohm is most common for Kettering (points) ignition.

 

[Anonymous]

Jerry,
Go with the higher ohm coil, if you have a choice. The lower ohm coils intended for racing will burn up faster, because they get hotter with less resistence. Just get the ones they offer at the local auto parts store, like Accel super stock (the yellow one), it works with breaker-less ignitions. And, keep the ballast to the coil (big/thick pink wire to pos. side of coil).

Kirk

I think I have to stay under 40,000v for the Pertronix, most of the coils at the parts store are more than that. What's the hottest coil I can run with stock points? Any benefits?

 

[kirkallen143]

For points use the stock coil, or you will end up burning them up faster with a hotter coil. They make a couple of different kinds (voltages) in the Accel brand, I ordred mine from the local parts house and had it in stock. Reason for the higher voltage coil in breaker-less ignitions is the ability to open your spark plug gap...better economy and running engine.

Kirk

 

[Anonymous]

Thank you Kirk.

 

[james singleton]

According to a chart on the IGNITOR website, they state the following for their 60,000 volt coils: "These coils are suitable for Ignitor and Ignitor ll ignition systems as well as STOCK POINT TYPE, factory electonic and many aftermarket ignition systems when the PROPER RESISTANCE rating is selected". I guess the key words may be "PROPER RESISTANCE RATING"; I am not sure exactly what "proper resistance rating" might be??? I also found it interesting that the 40,000volt coils listed on their chart were as follows: a 3.0ohm coil is for "4 & 6 cyl. - NORMAL DRIVING"; the 1.5ohm coil is for "4, 6, & 8 cyl. -RACING; and the 0.6ohm coil is for "4,6, & 8 cyl. - NORMAL & RACING"! So is a 1.5ohm coil for "RACING' , and the 0.6ohm coil for "NORMAL and/or RACING"????? Does that sound right to anyone, that the middle rated coil (the 1.5ohm) is listed for "racing", while the lower rated coil (the 0.6ohm) is listed for either "normal or racing"? Doesn't make sense to me! Jim S. S.Cal