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> Pertronix II trigger and 0.6 ohm coil with points backup
SVG223
post Apr 24 2025, 04:23 PM
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In case of a Pertronix 2 failure, I want to keep points or a cheaper Hot Spark in the glove box for a backup. I already have a 3-ohm 100-watt resistor. I should put the 3 ohm resistor between the switched power and the positive terminal on the 0.6-ohm coil, which should make 3.6 ohms of combined resistance and be safe for points. Bypass the resistor and use the key-switched power directly to the points and condenser/hot spark trigger. I already have these items and don't want to buy a second Pertronix 2 trigger.
Sound feasible? Thanks.
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SVG223
post Apr 25 2025, 05:05 PM
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Now I'm thinking about increasing the gap to something like 0.035". I probably won't notice the difference.
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porschetub
post Apr 26 2025, 02:25 PM
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QUOTE(SVG223 @ Apr 26 2025, 11:05 AM) *

Now I'm thinking about increasing the gap to something like 0.035". I probably won't notice the difference.

I have never increased plug gap with these units and fitted many of them , make sure you don't use solid (copper core ) leads as they don't play well with Ignitor II units .
Cheers.
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SVG223
post Apr 27 2025, 02:21 PM
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QUOTE(porschetub @ Apr 26 2025, 03:25 PM) *

QUOTE(SVG223 @ Apr 26 2025, 11:05 AM) *

Now I'm thinking about increasing the gap to something like 0.035". I probably won't notice the difference.

I have never increased plug gap with these units and fitted many of them , make sure you don't use solid (copper core ) leads as they don't play well with Ignitor II units .
Cheers.

Thanks. I currently have copper core wires, but I am actively looking at suppression wire options. Oddly, I can find spiral wound wire sets for V8s for $30, but for a 914 it is like $140. I'm considering buying the V8 set and hacking it up, and crimping on some connectors. Or buying a VW Beetle set and adding a wire or two. I found a web store that has some decent options. tonsperformance.com
I wasn't sure what the copper core would do to the ignitor, if it would burn it out or make the car run rough, as long as I can run it until I get the replacements in. There are 1000 ohms at the spark plug connectors and 5000 ohms at the rotor, but I guess the wires need to put in their two cents. I'm thinking about getting a 1000-ohm rotor instead, 5000 just seems excessive, but I'm just guessing. Scratch that, I just measured my rotor, it is 1 k-ohm.
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