Coil testing - HEI in-cap

HEI in-cap coil testing So, after looking at each test and zooming in on the spark plugs, I can’t really see any difference at all between any of these in-cap coils. I was hoping I would be able to see something in the slow-motion part of the video but I couldn't really see a difference there either. I did this same test with 4 external coils, and I can tell you there definitely was a visible difference…that video will be linked below. I was really hoping one of these coils would stand out. I guess I can pick one coil and then test a few different modules and see if that makes any difference…I really don’t think it will, but I guess we’ll have to see about that. Here are the Primary and Secondary ohm results: Stock coil - .5 primary, 5.98 k ohms secondary High Output coil - .6 primary, 11.54 k ohms secondary MSD coil - .4 primary, 8.86 k ohms secondary Accel coil - .6 primary, 8.6 k ohms secondary There is way more to coils than testing primary and secondary resistance but finding the exact specs for each of these coils is proving difficult. Most specs simply aren’t listed but again…this test wasn’t meant to be super scientific. I just like playing with this little machine, LOL.