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Pertronix - Pros & Cons - Video & Pics

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Re: Petronix - Pros & Cons

OK Vping, while not desireable the rotor is safe for now.If you have some super glue handy put some in the void behind the brass contact and push it all the way back-Towards the top of the screen-. get a new one soon. With the engine Idling. line up the timing marks using the dial on the back of the timing light. Watch the alignment of the timing marks while the engine idles.If the mark on the damper jumps around there is wear in the DIZZY.---Fwiw--Keoke
 
Re: Petronix - Pros & Cons

I guess as long as I can maintain a constant idle that does not fluctuate, it can be high or low. I'll restart & let it warm up again and will try and get it to run smoothly. My guess would be that after it warmed up it should run consistant no matter how the idle is set. I will however make sure that the rotor is glued together and does not have that minimal play.

The dial on the back of the timing light, if I change it, the alignment of the marks change. What should I be looking to try and keep it at? I started off setting it to 10 and then looked at the marks and it only slightly varied. If I turn the dial up to 15 the mark on the damper moves clockwise. I'll try and do again tonight.

Also, just standing in garage, makes me pour sweat. Heat index today is 110Âş. That's advanced timing.
 
Re: Petronix - Pros & Cons

It seems to be doing what it is suppose to do, For this test just set the dial so that the timing marks line up. Do not change the dial any more. Watch the aligned marks using this dial setting with the timing light and see that the marks stay aligned.Very small deviations are OK.But if the mark on the damper moves forward and reverse significantly there is wear in the DIZZY.---Keoke
 
Re: Petronix - Pros & Cons

The change is only up towards 15 deg. As the idle drops the timing changes higher. It does not go below 10.
 
Re: Petronix - Pros & Cons

It should not go anywhere, it should remain fixed at what ever DEG Number the dial was set at to align the two timing marks.Line them up again and then do not touch that dial.If the timing mark on the vibration damper moves sporatically on its own you have a worn DIZZY.---Keoke

Questions: are there timing marks on your vibration damper???
Do you have a Vacuum advance hooked up???
 
Re: Petronix - Pros & Cons

I don't think I have a vacuum advance. It's a fairly stock '67.

There is a notch in the damper with chalk on it and there are 3 small pointers behind it which is how I was able to static to 10Âş.
 
Re: Petronix - Pros & Cons

"If the timing mark on the vibration damper moves sporatically on its own you have a worn DIZZY.---Keoke"
OR
The "fine print" in the timing light instructions cautions to use a resistor plug wire on the cylinder that you are taking the timing signal from. Using a solid wire can definitely cause erratic timing light readings.
D
 
Re: Petronix - Pros & Cons

Is pulling the dizzy difficult and by doing so, will it allow me to inspect for wear? If I can rule this out, it's one piece to the puzzle.

Odd thing is that at speed she is responsive & runs great. Only at low RPM, light waiting at a light, does it run rough.
 
Re: Petronix - Pros & Cons

HI Dave, none of mine say that and they work just fine.---Keoke
 
Re: Petronix - Pros & Cons

[ QUOTE ]
Is pulling the dizzy difficult and by doing so, will it allow me to inspect for wear? If I can rule this out, it's one piece to the puzzle.

Odd thing is that at speed she is responsive & runs great. Only at low RPM, light waiting at a light, does it run rough.

[/ QUOTE ]

No pulling the Dizzy is not difficult. However, checking for wear you need to know what to look for. Using the strobe[ Timing Light] is much easier and more accurate.

Poor performance at Idle can be attributed to wobble in a worn Dizzy.----Keoke
 
Re: Petronix - Pros & Cons

[ QUOTE ]
...Poor performance at Idle can be attributed to wobble in a worn Dizzy.----Keoke

[/ QUOTE ]

So I guess when I am at speed you can't notice it. Hmm OK.
 
Re: Petronix - Pros & Cons

[ QUOTE ]
[ QUOTE ]
...Poor performance at Idle can be attributed to wobble in a worn Dizzy.----Keoke

[/ QUOTE ]

So I guess when I am at speed you can't notice it. Hmm OK.

[/ QUOTE ]

Yep centrifical force introduces a constant error as apposed to the low speed wobble.---Keoke- /ubbthreads/images/graemlins/driving.gif
 
Re: Petronix - Pros & Cons

Had not thought of that, good point.
 
Re: Petronix - Pros & Cons

[ QUOTE ]
Had not thought of that, good point.

[/ QUOTE ]

Well Jack, thats nuttin- sometimes I stop to think and forget to start again.---Keoke- /ubbthreads/images/graemlins/laugh.gif-- /ubbthreads/images/graemlins/jester.gif
 
Re: Petronix - Pros & Cons

Ha, well that's why I am here, to learn.
 
Re: Petronix - Pros & Cons

huh... I have the habit of stopping to think and then forgetting what I stopped to think about.... /ubbthreads/images/graemlins/rolleyes.gif
 
Re: Petronix - Pros & Cons

If the rotor button contact makes contact with the lugs in the cap fine brass dust can coat the surfaces and cause shorting and misfiring. This occured with a brand new rotor and cap back in the 60's. Tokk a while to figure this on out. A new rotor and all was right with the world again. Phil
 
Re: Petronix - Pros & Cons

I stop when I forget what I was thinking about and start to walk backwards.
Should look at the car tonight to see whats up.
 
Re: Petronix - Pros & Cons

Yeah Dave, thats interesting but thats all.Like I say mine work just fine and they like my Sears unit too.---Keoke- /ubbthreads/images/graemlins/grin.gif
 
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