Distributor curve help needed

Mattax said
Halfway on the long loop would be about half of the advance available. 8.5* crankshaft degrees
The primary spring should have enough tension to hold the weight at the bottom of the slot.
Otherwise you will find the timing changing with idle rpm.

View attachment 1715766154

View attachment 1715766155

The heavy long loop spring was preventing the weight from fully retracting. I removed that spring and put in a silver one with the following results:

500-18*
1000-19*
1500-23*
2000-29*
2500-34*
3000-35*
3500-37*