I know how you do it. I get it.
If I have the timing locked out and the customer won’t pay for me to steady state test it I make a pull with the timing pretty slow, say 26 degrees. That gets me pretty close on the peaks.
Then I go the peaks, load it down and move the timing around and watch the numbers.
I still need to put a curve in the distributor so most of it is a guess.
The distributor in the 395 mentioned above wants 25 degrees initial at 1k and IIRC it’s only 28 at 4500 or close to it. So it’s pretty slow through there and the it gets faster from peak torque to peak power.
I didn’t plot his curve but I should have. It’s slow to peak torque and it’s faster from peak torque to peak power.
Again, I don’t know how you figure that out doing a sweep test.