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Old 12-05-2011, 06:48 PM   #1
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Default Ramjet distributor cap & rotor

For you guys running a ramjet system, as you may know the ramjet distributor cap has aluminum contact terminals, They wear out fast.

So after a lot of research I found a distributor cap and rotor made by msd that fits the ramjet distributor.

It has copper teminals and should last a long time.

MSD Distributor Cap and Rotor, GM External Coil (8406)

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Old 12-05-2011, 09:41 PM   #2
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Interesting. I didn't know that.
Thanks Otis.

How fast do the original type wear out?

Is it the same part for the 350 Ramjet as it is for the big block?
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Old 12-05-2011, 10:02 PM   #3
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I never had a big problem with them on my old 95 pickup which uses the same distributor. I always thought the rotor was a total PITA because it was such a tight fit - you almost had to destroy it to remove it, and then you wondered whether you got the new one pushed down far enough.
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Old 12-05-2011, 10:38 PM   #4
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I got a copper terminal cap and rotor at NAPA, Echlin part # RR249 and RR250.
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Old 12-05-2011, 10:49 PM   #5
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Quote:
Originally Posted by acardon View Post
I got a copper terminal cap and rotor at NAPA, Echlin part # RR249 and RR250.
Don, did you have trouble with the cap your RamJet came with?

Thx for the part #s.
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Old 12-05-2011, 11:01 PM   #6
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I was concerned about the large gap between the rotor tip and terminal inside the cap. I had a miss and thought that may be the problem, but it turned out to be the billet bling wire looms. The original GMPP wires were arcing to the inside of the loom. I went with a insulated loom and MSD wires to solve the problem.
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Old 12-06-2011, 03:58 AM   #7
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Copper terminals do not corrode the terminals like aluminum does.

Otis
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Old 12-06-2011, 07:36 AM   #8
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Interesting. I have never removed the distributor cap from my Ramjet to notice. I now have 7,000 miles on the engine...how long should the stock cap & rotor last?

Is there a black copper cap replacement available instead of red?
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Old 12-06-2011, 10:10 AM   #9
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Quote:
Originally Posted by jswilke View Post
Interesting. I have never removed the distributor cap from my Ramjet to notice. I now have 7,000 miles on the engine...how long should the stock cap & rotor last?

Is there a black copper cap replacement available instead of red?
You can tell if they are copper by pulling one of the wires off. As Rick said, that's the same cap that GM used on mid 90's cars and trucks, so it should last for a while.
The NAPA cap is black.
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Old 12-06-2011, 05:50 PM   #10
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Quote:
Originally Posted by acardon View Post
You can tell if they are copper by pulling one of the wires off. As Rick said, that's the same cap that GM used on mid 90's cars and trucks, so it should last for a while.
The NAPA cap is black.
Thanks, Don.
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