 Pertronix ignition, Coil voltage |
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| sumcar71 |
 May 29 2022, 02:05 PM
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#1
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Newbie  Group: Members Posts: 3 Joined: 16-September 14 From: Colorado Member No.: 17,909 Region Association: None  |
I have a 1971 914 with fuel injection and points and I’m looking to install Pertronix electronic ignition. Do have to modify primary wiring to ensure 12 volts at positive side of the coil? Will the factory tachometer still work?
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| porschetub |
May 29 2022, 03:15 PM
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#2
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Advanced Member Group: Members Posts: 4,729 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(sumcar71 @ May 30 2022, 08:05 AM)  I have a 1971 914 with fuel injection and points and I’m looking to install Pertronix electronic ignition. Do have to modify primary wiring to ensure 12 volts at positive side of the coil? Will the factory tachometer still work? Just use the correct Pertronix coil for the module you buy ,I use Igniter II and Clewitt Eng plug leads for my "6",been great for some time ...no issues ,I don't use the Pertronix coil and I have Permatune CDI so use their matching transformer coil to best effect. Your stock tacho should be fine,you will need to wire the setup as per their instructions however.   Shown is the 3 pin CDI and the other for T4 motor. If unsure you can visit their site and download the fitment manual before you order your unit. |
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| Van B |
May 29 2022, 06:37 PM
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#3
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Senior Member Group: Members Posts: 1,618 Joined: 20-October 21 From: WR, GA Member No.: 26,011 Region Association: None 
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Pertronix I and II will work with your OE coil. The Pertronix III will not work with OE fuel injection.
It is an incredibly simple two wire hook up. Just put positive to positive and negative to negative on the coil and you’re off to the races. I love my Pertronix Ignitor II! |
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| Dave_Darling |
May 30 2022, 05:18 PM
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#4
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914 Idiot Group: Members Posts: 15,057 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Why won't the III work with fuel injection? Do you mean specifically L-Jet, which takes its injection timing from the ignition points, or all fuel injection?
If you have a vacuum-advance distributor, make sure you get the version of the Ignitor that accommodates the vacuum arm. If you get the other one, the rotor will not sit down all the way on the shaft and you won't be able to put the cap on correctly. --DD |
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| Van B |
May 30 2022, 05:47 PM
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#5
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Senior Member Group: Members Posts: 1,618 Joined: 20-October 21 From: WR, GA Member No.: 26,011 Region Association: None
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You’ll have to talk to Pertronix, but they specifically said that the multi-spark on the Ignitor III is meant to work with carbs or throttle body injection.
I was advised not to purchase the three if I have OE fuel injection regardless of the year. |
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