The best timing curves can be obtained with a lap top in my opinion.

Basically the timing advance forces more electrons into the windings at higher rpm to compensate for coil saturation (depending on settings)

If timing is started too much too low it can cause heat & loss of torque.

I tend to use very broad curves 3300 start, 54,000 end rpm & 20-40 deg timing max.

You can make it act like a second gear if it fully engages in a narrow window.