Tuning For Detonation

Mattax said
maybe this will help complete the picture.
Lets say the advance looks like the dotted line; And lets say you want to keep the 20* initial and 35* max.
View attachment 1715730996

Turning the long loop spring's perch or using a shorter loop will change the advance like this.
View attachment 1715731000
It only takes a few degrees out of the mid rpms and leaves the top and low rpm timing as is.

I like this idea, though I think he is already into the full advance when he tips it.
..and now iwouldn't call it ragged edge if he is doing this with 87. I'd call it motor abuse. Lol

This is for the general reader of this thread.
Knowing what you what you have read..ask yourself this...
Given the choice...why would you run 87 and detune for it...when you'll only make less power that way.