Many years ago, i discovered that my Pig ran better with more dizzy advance than the FSM called for. Not an uncommon finding, alledgedly.
My BB disappeared behind the bellhousing and i never saw it again until recently. I would time with the vacuum gauge. Get my best vacuum and back off the advance just a bit. I was getting almost 15 in. Hg at a 700ish RPM idle. At about 5k elevation in Denver.
Then relocated to about 3k elevation and started running stupid Ca gasoline (had been running ethanol free). Figured i better tune for both.
Borrowed one of those new-fangled digital reading out timing lights with a tach and advance functions. Just for fun, tried to determine what i was timed at. So, fiddled with it and brought the BB into the light then to the pointer, red numbers showed 37. What the heck? Add the 7 for the BB and i was running at 44 degrees advance?(!). Is that even possible?
So, i wondered how or if this timing light knew i was running a straight 6 and not a v8. Does it?
My tach has a switch to tell it how many cylinders i got. Not this timing light.
Also, figured out that the inner diaphragm on the 60 series dizzy did not hold air, so i was running only mech advance. Checked the weights and springs and they seemed to move freely, the outer diaphragm holds air and moves the breaker plate to oral suction, so i put the vac line from the carb to it.
Currently timed to 18 or 19 degrees advance at 700 rpm idle, getting only 13" vacuum and it does not tach to 3k (it's redline) like it used to.
So, I'm trying to figure out if i can trust this timing light or go back to old-fashioned eyes & ears and SOP testing. This timing light tach does not exactly agree with in-dash tach.
Figure i need to fix advance diaphragm leak and refurbish dizzy guts too.
Oh, pics. Cuz it happening
My BB disappeared behind the bellhousing and i never saw it again until recently. I would time with the vacuum gauge. Get my best vacuum and back off the advance just a bit. I was getting almost 15 in. Hg at a 700ish RPM idle. At about 5k elevation in Denver.
Then relocated to about 3k elevation and started running stupid Ca gasoline (had been running ethanol free). Figured i better tune for both.
Borrowed one of those new-fangled digital reading out timing lights with a tach and advance functions. Just for fun, tried to determine what i was timed at. So, fiddled with it and brought the BB into the light then to the pointer, red numbers showed 37. What the heck? Add the 7 for the BB and i was running at 44 degrees advance?(!). Is that even possible?
So, i wondered how or if this timing light knew i was running a straight 6 and not a v8. Does it?
My tach has a switch to tell it how many cylinders i got. Not this timing light.
Also, figured out that the inner diaphragm on the 60 series dizzy did not hold air, so i was running only mech advance. Checked the weights and springs and they seemed to move freely, the outer diaphragm holds air and moves the breaker plate to oral suction, so i put the vac line from the carb to it.
Currently timed to 18 or 19 degrees advance at 700 rpm idle, getting only 13" vacuum and it does not tach to 3k (it's redline) like it used to.
So, I'm trying to figure out if i can trust this timing light or go back to old-fashioned eyes & ears and SOP testing. This timing light tach does not exactly agree with in-dash tach.
Figure i need to fix advance diaphragm leak and refurbish dizzy guts too.
Oh, pics. Cuz it happening