ignition coil

[bluecoupe30!]

My '72 carbed E9 has original black coil, with ballast. Also, some time in the '80s an electronic ignition was added. What coil would be the proper replacement, without any additional wiring. Looked at a Bosch Red one (00013) but it says not for transistorized ignition. Thoughts? Mike

 

[HB Chris]

The Bosch red coil with the 1.8 ohm ballast replaces the original black coil with 1.2 ohm ballast. Or go with the blue coil and no ballast resistor, it's internally regulated. I used the red coil with Pertronix but have no experience with electronic ignition.

 

[Peter Coomaraswamy]

I have the blue coil with Pertronix, seems to work well.

 

[bluecoupe30!]

Coil

Thank you gentlemen, very valuable indeed. Mike

 

[lloyd]

My '72 carbed E9 has original black coil, with ballast. Also, some time in the '80s an electronic ignition was added. What coil would be the proper replacement, without any additional wiring. Looked at a Bosch Red one (00013) but it says not for transistorized ignition. Thoughts? Mike

If you have been using the original black coil without any problems, why change it? Per HBChris's comments, the red coil is probably the closest in # windings and output, but others seem to find the blue coil satisfactory. That said, a better answer to your question may depend upon more specifics.

Referencing a generic electronic ignition may allow for a general response. Do you have a factory "pointless" high energy transistorized ignition retrofitted to your engine, or a common aftermarket points replacement such as pertronix, or for that matter, points fitted with a capacitive discharge ignition system? A coil choice for the latter two examples is not particularly critical for a street car. However, if you have a pointless high energy ignition that the factory offered in later models, you are best to use a coil designed for that system (see below). Coils paired with the so-called transistorized high energy ignition systems are generally marked as such.

B) Version without contact breaker points
Check ignition coil - see 11 00 009. Disconnect wires. Take ignition coil off or holder. Note when fitting: Black/red wire to terminal 15 black wire to terminal 1 Only install ignition coil Bosch No. 0 221 122 003.
Caution! If an ignition coil for contact breaker points is installed this would cause ignition failure and starting problems.

 

[deQuincey]

My '72 carbed E9 has original black coil, with ballast. Also, some time in the '80s an electronic ignition was added. What coil would be the proper replacement, without any additional wiring. Looked at a Bosch Red one (00013) but it says not for transistorized ignition. Thoughts? Mike

based on your text it seems that you are not talking about the same thing, or that you do not know what are you talking about

pertronix or equivalent point replacement systems are hall effect devices, not an especialist in which coil can be used but i have not read anything contradictory with the use of your current coil and just replace points and remove condenser

transistorized ignition seems not to be only one type, but there were kits that pair a transistor feed box with a transistor specific coil with a doublé 0,4 & 0,6 resistor, in this case you keep points and remove condenser

again it is important to know what system you intend to use, otherwise it might be misleading and you or others might get in trouble

IMHO

 

[Stefan]

I have the black coil with Pertronix, seems to work well.

 

[bluecoupe30!]

Background here is top transmission oil cooler hose leaked onto inner fender. I cleaned the area but disturbed all wires in and out of coil. Then car would not start. Began to wonder about age of coil. Cleaned all contacts, replaced all terminals. Car starts fine now. Attached photo shows electronic addition that has bee a part of my car since the '80s. Cannot find any brand or model identification on it anywhere. Been very reliable, only ever replace cap and rotor. Just want to match new coil with similar to what I have now. Mike

 

[lloyd]

Background here is top transmission oil cooler hose leaked onto inner fender. I cleaned the area but disturbed all wires in and out of coil. Then car would not start. Began to wonder about age of coil. Cleaned all contacts, replaced all terminals. Car starts fine now. Attached photo shows electronic addition that has bee a part of my car since the '80s. Cannot find any brand or model identification on it anywhere. Been very reliable, only ever replace cap and rotor. Just want to match new coil with similar to what I have now. Mike

Looks to me like an Allison (later Crane) optically triggered points replacement and not the factory high energy transistorized ignition that requires a specific coil. I think the generic red. black or even blue Bosch coils would be fine, per other suggestions. I am kind of partial to the color of the yellow accel coils though . . . and those chrome specials are spiffy too. :lol:

Curious if any E9/E3s (M30s) have been fitted with some of the other "high end" after market ignition systems, for example Jacobsen. No, I am not suggesting there is a particular need for this modification or add-on, but firing spark plugs with an enormous .5" gap might have some unknown or unusual benefits.:smile:

 

[bluecoupe30!]

Coil

Wow Lloyd, unbelievable detail! Thanks for adding these images and I had completely forgotten about Crane from that era. I now am comfortable with acquiring a new coil as a backup. This one is still alive, but I will be prepared. I wonder how long ignition coils really last? I have some Lucas units that still work on my British cars, and they are 56 years old, though used sparingly. Mike

 

[Markos]

Wow Lloyd, unbelievable detail! Thanks for adding these images and I had completely forgotten about Crane from that era. I now am comfortable with acquiring a new coil as a backup. This one is still alive, but I will be prepared. I wonder how long ignition coils really last? I have some Lucas units that still work on my British cars, and they are 56 years old, though used sparingly. Mike

I have a red coil with a crane setup. Agree with Lloyd, looks just like my Crane setup from the rivets to the cooling fins, as well as the mounting tabs.