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Pertronix - Pros & Cons - Video & Pics
- Thread starter vping
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kennypinkerton
Yoda
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Re: Petronix - Pros & Cons
<threadjack> What is the adjustment on the timing light for? Mine does not have any adjustments.
<threadjack> What is the adjustment on the timing light for? Mine does not have any adjustments.
John Loftus
Darth Vader
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Re: Petronix - Pros & Cons
Vping,
That timing light should be fine and will let you adjust the timing at full advance which is the most important. The video you posted shows you rotating the shaft clockwise and counter-clock wise. This movement is normal and you are feeling the movement of the mechanical advance mechanism. What you should be checking for is how much deflection there is when you try to move the shaft side to side (towards the points/condenser/etc). If it is worn in this direction the shaft will wobble when it turns.
Vping,
That timing light should be fine and will let you adjust the timing at full advance which is the most important. The video you posted shows you rotating the shaft clockwise and counter-clock wise. This movement is normal and you are feeling the movement of the mechanical advance mechanism. What you should be checking for is how much deflection there is when you try to move the shaft side to side (towards the points/condenser/etc). If it is worn in this direction the shaft will wobble when it turns.
John Loftus
Darth Vader
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Re: Petronix - Pros & Cons
Kenny,
The adjustable timing light shows you the timing when the pully notch and pointer are lined up. If you move the dial on the light back and forth, when the notch/pointer line up, that is what ignition timing is set on.
So in practice let's say you wanted to set maximum timing advance of 33 degress at 3500 rpm. Set the timing light to 35, bring the engine up to 3500 rpm and then turn the dizzy until the notch and pointer line up. Very simple and you don't need multiple marks on the pully to keep track of.
Cheers,
John
Kenny,
The adjustable timing light shows you the timing when the pully notch and pointer are lined up. If you move the dial on the light back and forth, when the notch/pointer line up, that is what ignition timing is set on.
So in practice let's say you wanted to set maximum timing advance of 33 degress at 3500 rpm. Set the timing light to 35, bring the engine up to 3500 rpm and then turn the dizzy until the notch and pointer line up. Very simple and you don't need multiple marks on the pully to keep track of.
Cheers,
John
tony barnhill
Great Pumpkin - R.I.P
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Re: Petronix - Pros & Cons
[ QUOTE ]
one problem is trying to set the "idle RPM" without the benefit of a good timing lite
[/ QUOTE ]
Well, I was always told Craftsman was a good timing light....Chinese laughter /ubbthreads/images/graemlins/hammer.gif /ubbthreads/images/graemlins/cheers.gif
[ QUOTE ]
one problem is trying to set the "idle RPM" without the benefit of a good timing lite
[/ QUOTE ]
Well, I was always told Craftsman was a good timing light....Chinese laughter /ubbthreads/images/graemlins/hammer.gif /ubbthreads/images/graemlins/cheers.gif
Keoke
Great Pumpkin
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Re: Petronix - Pros & Cons
/ubbthreads/images/graemlins/savewave.gif Vping:
OK I got things all sorted out now.Well it seem to me that you are rotating the cam and that amount of rotation is what is to be expected and is not play in the DIZZY. If you have play wiggling the cam from side to side will cause the points to change their setting while setting on a lobe. Forget that.Start the engine and dial in the timinig on the lite at idle. Just use a low speed idle, if the timing mark jumps around a bit[ keep your mits off the knob] you have play in the DIZZY---Keoke
/ubbthreads/images/graemlins/savewave.gif Vping:
OK I got things all sorted out now.Well it seem to me that you are rotating the cam and that amount of rotation is what is to be expected and is not play in the DIZZY. If you have play wiggling the cam from side to side will cause the points to change their setting while setting on a lobe. Forget that.Start the engine and dial in the timinig on the lite at idle. Just use a low speed idle, if the timing mark jumps around a bit[ keep your mits off the knob] you have play in the DIZZY---Keoke
Keoke
Great Pumpkin
Offline
Re: Petronix - Pros & Cons
[ QUOTE ]
[ QUOTE ]
one problem is trying to set the "idle RPM" without the benefit of a good timing lite
[/ QUOTE ]
Well, I was always told Craftsman was a good timing light....Chinese laughter /ubbthreads/images/graemlins/hammer.gif /ubbthreads/images/graemlins/cheers.gif
[/ QUOTE ]
OH they are ok Tony, the calibration marks on the dial are a bit wide thats all. I have their top of the line "lite" and the Snap On too they do not vary much more than say a 1/2 DEG apart.No Chinese Whispers---Keoke- /ubbthreads/images/graemlins/grin.gif
[ QUOTE ]
[ QUOTE ]
one problem is trying to set the "idle RPM" without the benefit of a good timing lite
[/ QUOTE ]
Well, I was always told Craftsman was a good timing light....Chinese laughter /ubbthreads/images/graemlins/hammer.gif /ubbthreads/images/graemlins/cheers.gif
[/ QUOTE ]
OH they are ok Tony, the calibration marks on the dial are a bit wide thats all. I have their top of the line "lite" and the Snap On too they do not vary much more than say a 1/2 DEG apart.No Chinese Whispers---Keoke- /ubbthreads/images/graemlins/grin.gif
MGretired
Senior Member
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Re: Petronix - Pros & Cons
I've had a pertronixs in the B for 6 years and in the TD for 3 years...no problems! I carry a spare pertronixs in both cars in case they ever "give up the ghost", as I never want to go back to points. Had the TC going to GOF West had a spare Pertronixs (or even pionts & condesor) it would have been a 10 minute fix instaed of a tow. /ubbthreads/images/graemlins/driving.gif
I've had a pertronixs in the B for 6 years and in the TD for 3 years...no problems! I carry a spare pertronixs in both cars in case they ever "give up the ghost", as I never want to go back to points. Had the TC going to GOF West had a spare Pertronixs (or even pionts & condesor) it would have been a 10 minute fix instaed of a tow. /ubbthreads/images/graemlins/driving.gif
sunkissedhealey
Senior Member
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Re: Petronix - Pros & Cons
It played alright.
Rob
It played alright.
Rob
Keoke
Great Pumpkin
Offline
Re: Petronix - Pros & Cons
No Jack, if you rotate the rotor in the direction it will move and hold it there then suddenly release it, it should spring back to its original position,If it does not do this then the advance spring may be off its post,broken, stretched or they are reversed.---Keoke
No Jack, if you rotate the rotor in the direction it will move and hold it there then suddenly release it, it should spring back to its original position,If it does not do this then the advance spring may be off its post,broken, stretched or they are reversed.---Keoke
OP
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Re: Petronix - Pros & Cons
OK bear with me on this. Pics are ehh but you should get the idea.
First is of current shiny rotor with 69 sprite fotor from mid seventies. Brass on screen from top to bottom is all the way up towards the top of the screen. Brass rivit that hold blade is not tight. Notice how the older rotor is held in by a melted rivet.
This the same shot with the brass pushed towards the bottom of the screen. There is about .013" play.
This next picture is from the side. I marked brass blade with red and have it pushed in.
Last pic is the same shot but with blade pulled out. You can see the exposed brass next to the red mark. Even thought blurry you can still make it out.
The older rotor has ZERO movement. I checked my 72 Midget rotor and there is also some play. Also all three dizzy's do not return the shaft if I rotate by hand. A little but not really springy.
OK bear with me on this. Pics are ehh but you should get the idea.
First is of current shiny rotor with 69 sprite fotor from mid seventies. Brass on screen from top to bottom is all the way up towards the top of the screen. Brass rivit that hold blade is not tight. Notice how the older rotor is held in by a melted rivet.
This the same shot with the brass pushed towards the bottom of the screen. There is about .013" play.
This next picture is from the side. I marked brass blade with red and have it pushed in.
Last pic is the same shot but with blade pulled out. You can see the exposed brass next to the red mark. Even thought blurry you can still make it out.
The older rotor has ZERO movement. I checked my 72 Midget rotor and there is also some play. Also all three dizzy's do not return the shaft if I rotate by hand. A little but not really springy.