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Old 07-14-2004, 07:28 PM
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Join Date: Jun 2004
Location: Venezuela
Posts: 27
Spark plug wires - Pertronix upgrade

I am considering the Pertronix upgrade for my 280S. Now, I have the following questions:

1. What is the best option: Ignitor or Ignitor II?

2. Do I need a new coil from Pertronix or can I keep my current Bosch coil?

3. Do I need new spark plug wires?

4. If the answer is yes, then what type of wires do you suggest? Fastlane has Bosch plug wires. Are these the best option or should I get other wires?

Thanks in advance.

280S, 1969
250C, 1972
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Old 07-14-2004, 07:42 PM
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Join Date: May 2004
Location: Houston, Texas - USA
Posts: 125
Your choice of Ignitor is dictated by availability. Pertronix doesn't have many Ignitor II's available for 6 and 4 cylinders. I would get the flame thrower ignition coil to go with the Ignitor cause it'll allow you to get a super hot spark. You'll also have to regap your plugs. I think if you go with the Flame Thrower I you can use your stock wires but if you get the Flame Thrower II's you'll need special wires.
1970 280SE Coupe W111
Chassis Number: 111 024 12
Engine Number: 130 980 12
Exterior Color: 180 - Silver Grey Metallic
Interior Color: 243 - Leather Light Red
Transmission # 004470
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Old 07-17-2004, 07:27 PM
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Join Date: Jan 2002
Posts: 18,350
I put an Ignitor I in my Atomic 4 in the sailboat. Lots of other A4 users have done the same. I kept the original coil and wires but there are a lot of reports of overheating original coils with the Pertronix ignition in A4's. Those problems are fixed with epoxy coils I believe.

I believe I once read an explanation of this problem. It had to do with the Pertonix allowing for increased electrical current along with other problems (greater dwell angle????) as a result of only having 4 cylinders.

In any case, you will have to measure the resistance of your coil before using it anyway because there are precise resistance parameters for the Pertronix system.

1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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