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914World.com _ 914World Garage _ Pertronix Static Timing.
Posted by: tach Mar 23 2015, 09:48 AM
Is it possible to set the pertronix static ignition timing (distributor to crank timing)somewhat accurately with the engine out of the car? With a stock coil. I would like to do this before I install my rebuilt engine back into the 1974 1.8 914.
Posted by: bandjoey Mar 23 2015, 01:11 PM
I think static timing is to get points open by turning the distributor. (Experts will correct me I'm sure). With Pertonix There's no points. It's been a long time since I looked but I remember Pertronix web site having instructions on the initial setup to start the car. Good luck. Installed mine years ago and it works fine.
Posted by: tach Mar 23 2015, 06:44 PM
Accurate distributor timing is what I actually meant.
Posted by: stugray Mar 23 2015, 06:54 PM
Just try it the normal way.
It should work just like points.
You just cant check the dwell the same as points
Just be careful.
the older pertronix will fry if left on (for too long) and right at that trigger point where you will be setting the static timing.
Posted by: messix Mar 23 2015, 07:01 PM
mark the body of the distributor where the #1 plug is on the cap, then turn the engine until the pulley timing mark comes to the timing pointer in the inspection hole and set the distributor body to line the rotor up with the mark.
this will get it pretty close.
clear as mud?
Posted by: aircooledtechguy Mar 25 2015, 08:14 AM
When you install a Pertronix or Compufire ignition module you loose the ability to statically time the engine. Can't be done.
If you didn't move the dizzy in the clamp, you should be right where you left off with the other motor (provided the distributor drive gear was set correctly on both motors). If you did move it, then do what Troy (Messix) said to do.
Do yourself a favor prior to installing the dizzy, http://www.aircooledtech.com/pertronix_chafing/ and perform the slight modification inside the dizzy to ensure your wires stay in one piece. The Pertronix units are notorious for this and I see this in 75% of cars equipped with them. The engineers should have made it so the wires were coming out of the other side of the module. . .
Posted by: Philip W. Mar 25 2015, 08:21 AM
When you install a Pertronix or Compufire ignition module you loose the ability to statically time the engine. Can't be done.
If you didn't move the dizzy in the clamp, you should be right where you left off with the other motor (provided the distributor drive gear was set correctly on both motors). If you did move it, then do what Troy (Messix) said to do.
Do yourself a favor prior to installing the dizzy, http://www.aircooledtech.com/pertronix_chafing/ and perform the slight modification inside the dizzy to ensure your wires stay in one piece. The Pertronix units are notorious for this and I see this in 75% of cars equipped with them. The engineers should have made it so the wires were coming out of the other side of the module. . .
cool, thanks for pointing out this potential issue , imboing to check mine tonight!
Posted by: stugray Mar 25 2015, 08:29 AM
When you install a Pertronix or Compufire ignition module you loose the ability to statically time the engine. Can't be done.
If you didn't move the dizzy in the clamp, you should be right where you left off with the other motor (provided the distributor drive gear was set correctly on both motors). If you did move it, then do what Troy (Messix) said to do.
Do yourself a favor prior to installing the dizzy, http://www.aircooledtech.com/pertronix_chafing/ and perform the slight modification inside the dizzy to ensure your wires stay in one piece. The Pertronix units are notorious for this and I see this in 75% of cars equipped with them. The engineers should have made it so the wires were coming out of the other side of the module. . .
So you are saying that if you turn on the ignition and rotate the dist, you cannot get the pertronix to turn ON without the engine running?
Sorry but I have done it before.
The 12V test lamp turns on & off as you trun the dizzy.
Or are you saying that it just wont be accurate?
And when you switch from points to pertronix the "phasing" of the On/Off changes so the position of the dizzy needs to change between points & pertronix.
They trigger at slightly different points.
I have tested the magnetically triggered ones and the optical modules.
Both will turn on/off for rough static timing.
Posted by: mskala Mar 25 2015, 09:37 AM
When you install a Pertronix or Compufire ignition module you loose the ability to statically time the engine. Can't be done.
...
So you are saying that if you turn on the ignition and rotate the dist, you cannot get the pertronix to turn ON without the engine running?
Sorry but I have done it before.
The 12V test lamp turns on & off as you trun the dizzy.
Or are you saying that it just wont be accurate?
And when you switch from points to pertronix the "phasing" of the On/Off changes so the position of the dizzy needs to change between points & pertronix.
They trigger at slightly different points.
I have tested the magnetically triggered ones and the optical modules.
Both will turn on/off for rough static timing.
Agree. I also have done the same thing with /6. You can simply connect a
spark plug & wire to the cap and place plug near metal ground. Turn dist
back and forth and you can get a spark if you hook up the other ignition
electricals.
Posted by: stugray Mar 25 2015, 01:08 PM
When you install a Pertronix or Compufire ignition module you loose the ability to statically time the engine. Can't be done.
...
So you are saying that if you turn on the ignition and rotate the dist, you cannot get the pertronix to turn ON without the engine running?
Sorry but I have done it before.
The 12V test lamp turns on & off as you trun the dizzy.
Or are you saying that it just wont be accurate?
And when you switch from points to pertronix the "phasing" of the On/Off changes so the position of the dizzy needs to change between points & pertronix.
They trigger at slightly different points.
I have tested the magnetically triggered ones and the optical modules.
Both will turn on/off for rough static timing.
Agree. I also have done the same thing with /6. You can simply connect a
spark plug & wire to the cap and place plug near metal ground. Turn dist
back and forth and you can get a spark if you hook up the other ignition
electricals.
I just use a DMM in voltage mode and put it on the Coil - (minus) side where it hooks to the "points" wire. As you turn the dist body, the voltage will go to 12 volts when the points are open and to close to zero volts when the points are closed.
Pertronix works the same
Posted by: stugray Mar 26 2015, 06:53 PM
Here is a video of a pertronix unit powered with a 12 V power supply and a test light in place of where the coil would be.
So when setting the static timing you are just trying to find the "edges" of the on off cycle, you can do it with the rotor stationary @ TDC -5 degrees and twist the body to find the point where the light transitions to off simulating the points opening.
http://vid366.photobucket.com/albums/oo101/stuartjgray/VID_20150326_183234_991_zpswv5mmwit.mp4
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