proper coil?
Thread Starter
Racer
Joined: May 2009
Posts: 316
Likes: 1
proper coil?
I need a coil for my 68 327/350. The coil in now is a chrome accel but its years old with no defining information on it. I see that after market coils have all types of Ohm ratings. i have seen .6 up to 1.5 primary resistance ratings on aftermarket coils. Looking at my shop manual I see a rating of 1.77 to 2.05 V-8 (non Transistor and .41-.51 V-8 (Transistor) primary resistance-Ohms for the coil(not sure what transistor vs non transistor is).
So far I have not seen any ratings as high as whats shown in the shop manual and i am confused as to what the importance of the Ohm level is. Most of the after market suppliers eg. accel mallory, pertronix indicate their coils fit my car but the ohm ratings are different. any ideas, suggestions, or comments on this?
So far I have not seen any ratings as high as whats shown in the shop manual and i am confused as to what the importance of the Ohm level is. Most of the after market suppliers eg. accel mallory, pertronix indicate their coils fit my car but the ohm ratings are different. any ideas, suggestions, or comments on this?
Le Mans Master
Joined: Mar 2001
Posts: 5,738
Likes: 644
From: Lincoln, CA
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Lower resistance means that the coil will draw more current than a stock coil. That MIGHT translate to a hotter spark...but, most likely, it won't because of other issues.
There is no reason to install anything other than a stock ignition coil in your car, unless you have some special need for operating it at a very high rpm level (over 6k rpm) or are racing it regularly. The transistor ignition uses a special distributor along with an electronic ignition module that mounts near the left headlamp.
If you have a stock points-type ignition system, just get the appropriate coild for that system. If you do have the TI ignition system, it uses a different stock coil. Parts houses should be able to supply either.
There is no reason to install anything other than a stock ignition coil in your car, unless you have some special need for operating it at a very high rpm level (over 6k rpm) or are racing it regularly. The transistor ignition uses a special distributor along with an electronic ignition module that mounts near the left headlamp.
If you have a stock points-type ignition system, just get the appropriate coild for that system. If you do have the TI ignition system, it uses a different stock coil. Parts houses should be able to supply either.
