Pertronix 12 v source
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,432
Likes: 22
From: Oxford CT
Pertronix 12 v source
According to the instructions, the igniter module requires a full 12v to operate properly. Seeing how the current lead on c3 is 9v (resistor wire) to the coil, what would be a good source for the 12v that operates with the key?
I remember seeing a post on this in the past, but couldn't find anything with a search.
I remember seeing a post on this in the past, but couldn't find anything with a search.
Pro
Joined: Jul 2001
Posts: 660
Likes: 0
From: Pleasant Valley MO
Re: Pertronix 12 v source (Roadster71)
I ran a wire right from the fuse box. Take your test light and see which is hot with key off, then with key on.
I haven't had any problems, and I got a nice spark.
:cheers: Larry
I haven't had any problems, and I got a nice spark.
:cheers: Larry
Pro
Joined: Jul 2001
Posts: 660
Likes: 0
From: Pleasant Valley MO
Re: Pertronix 12 v source (Roadster71)
Yes I just looked and there is a location on the fuse panel towards the bottom and center that says ign. use that one. I ahve a wire coming from it already, but I just spliced into it. works good
:cheers: Larry
:cheers: Larry
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,432
Likes: 22
From: Oxford CT
Re: Pertronix 12 v source (bigvette1)
Thanks all for the responses, I will give the ignition fuse location a try. The car is a 4-speed with a bi-metal choke on the carb so there is to sol. or elec choke.
Team Owner
Joined: Jun 2001
Posts: 43,136
Likes: 155
From: Thomson Georgia
Re: Pertronix 12 v source (69vette66)
I ran a wire right from the fuse box. Take your test light and see which is hot with key off, then with key on.
I haven't had any problems, and I got a nice spark.
:cheers: Larry
I haven't had any problems, and I got a nice spark.
:cheers: Larry
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Melting Slicks
Joined: Feb 2001
Posts: 3,330
Likes: 13
From: Europe , Luxembourg
Re: Pertronix 12 v source (Roadster71)
Hi
Just find the coil resistor and connect to the incoming power lead.
On my 68, the resisitor is located above the wiper motor.
I first had the PERTRONIX connected behind the resistor and at idle RPM, when the aux electric fan cut in, the engine dyed. Thsi was due to the PERTRONIX running at its limit Voltage and due to the momentary Voltage drop at fan cut in, it dyed.
No more problems after connecting it in front of the resistor at the 12 V input.
Good luck Gunther :seeya
Just find the coil resistor and connect to the incoming power lead.
On my 68, the resisitor is located above the wiper motor.
I first had the PERTRONIX connected behind the resistor and at idle RPM, when the aux electric fan cut in, the engine dyed. Thsi was due to the PERTRONIX running at its limit Voltage and due to the momentary Voltage drop at fan cut in, it dyed.
No more problems after connecting it in front of the resistor at the 12 V input.
Good luck Gunther :seeya
Drifting
Joined: Jan 2002
Posts: 1,645
Likes: 11
From: Schaumburg IL
Re: Pertronix 12 v source (WESCH)
WESCH is pointing out a good point on Pertronix and realy all boxes, Crane, MSD, Mallory etc. These things need +12vdc to run right. The coil wire from from the ignition is only +12 during start then drops to 9vdc or lower. Hence, the firing of the box may and may not happen. Pick up a true +12vdc at the fuse box or other source that is only on when the ignition is turned on.
Another point is don't forget to set the rev limiters (either switches or pills)at least what your expected top RPM's will be, or when you hit the rev limit - poop you cut out dropping pulses and can chase you tail looking for a misfire.
Another point is don't forget to set the rev limiters (either switches or pills)at least what your expected top RPM's will be, or when you hit the rev limit - poop you cut out dropping pulses and can chase you tail looking for a misfire.
