I swear I learn more from these videos than I ever have at schooll

Spark scatter.   I believe that's what you're trying to get at..

I appreciate that Nate is willing to admit when he just doesn't know something; I've also seen Steve do the same a few times. It takes bravery to acknowledge... you don't always have all the answers.

I never knew iron blocks made more hp than aluminum blocks, that’s why I watch your videos.

That engine is perfect for my truck. Thanks for the video Steve.

The flux capacitor is cattywampus

:_dewey:Another class at Steve Morris University (SMU).  I think I know whay I'm doing, then Steve teaches me something new.  The info on tuning is great!! :_dewey:

If you've ever watched one of the clear HEI caps on a running engine you've seen the arcing hell that's going on inside the cap.    Which is right above the pickup electronics which have to be getting radiated by all the arcing.    Going to crank trigger removes it from all the interference inside the cap and going distributor-less even better for spark accuracy.

Great sound effects Steve!

EMF is the noise

Spark scatter! Been there done that 😁😂

On the term you asked about around 8:05: it's mostly magnetic crosstalk (closely spaced targets' fields overlap and the signal smears), plus latency. Every pickup and its electronics add a small delay, and that delay becomes more timing error as RPM goes up. A distributor also turns at half crank speed and picks up chain/gear scatter. Your RPM trace going rock solid after the crank trigger swap is exactly what that predicts.

On cam sync: that's true for a fixed cam, but not for VCT. A VCT engine reads the cam signal the whole time it runs, to control cam timing. I've been testing a VCT PCM on a bench, and losing the cam signal shut the cam control down right away, even with the crank signal still there. We've also seen small signal delays cause erratic readings as RPM climbs, the same kind of thing your crank trigger cleaned up.

Hysteresis

Thanks, I have been waiting on this test for a while !

Thanks Steve and Kyle!

👋Always a pleasure to see dbl A joe. The ignition speed and fire to burnt timing was interesting .
Love the videos. Always find something to think about in them.

8:20 "Cross talk" or "saturation". In this context it's a condition called spark scatter.

Structural integrity

I've always called it electrical turbulence

Great content thanks for sharing