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To get an apples-to-apples comparison you need to overlap the signals. Figure out how to trigger. Use a rising-edge that is set around 0 volts. Then zoom in so that you see only one waveform. This will overlap the curves.
If you are looking for spark scatter that is better with a timing light...
You can use an inductive pick-up from a timing light to see the spark going to the plug.
With a scope you can only measure voltage. If you measure voltage across a resistor then you are measuring current.
Keep working on the trigger part - that feature will overlap all the spark firing lines...
I'll agree with that. Been racing 1/4 mile for decades using Dextron. Back in the 90's I tried a season with type F on a new rebuild. I really couldn't tell if the trans shifted firmer (4000+ stall converter) but end of season teardown revealed beat up brass with type F.
Never again.
So I found myself a distributor (383) and took it apart and cleaned it up good. When driving the rollpin that holds the nylon collar she decided to let go. Anyone got a lead of where one can acquire one?
Thanks
I was about 12 for 12 until 3 years ago. I built a bit spicy 350 Chevy, with a hydraulic cam/lifters with around 0.5" lift. Exhaust cam lobe #8 got wiped out pretty quickly (Summit cam). I replaced it with a similar Comps cam and everything was fine after break-in.
I avoided one on a 383 with a...
I'll be doing this in a month or so. I've thought about taking an old torque converter and cut off most of the converter so that only the ring gear and fllexplate mounts are left.
Anybody try this?