What is your interpretation of these advance springs?
The initial position of the weights is all the way in. The spring force holding the weight is determined by the spring rate and how far it is stretched. So even though its a heavier spring, how much force it applies initially can be adjusted by changing the initial tension.
The spring perch is adjustable. If you look close you can see its mounted on an eccentric.
Increasing the primary spring's tension will delay the rpm begins to advance.
The '63 primary spring is made of heavier wire and about the same number of coils, so timing will advance more slowly than the one from the electronic.
Drawn on graph the '63 spring will have an advance something like the light blue lines and the new primary spring like the dark blue from 300 to 800 rpm
As the rpms increase, the weights move further out and eventually engage the secondary springs.
The inside length of the secondary spring and the spring perch position will determine how many degrees advanced before it engages.
Eyeball guess is the new secondary spring is longer and therefore will allow more advance before engaging.
It has less coils so will have a higher spring rate and slow the advance more.
On the graph the secondary springs help slow the advance which will continue until the slots stop the weights at 11.5* for the early distributor and 13* for shiny new one. For a clearer comparison, deleted the minimum specs from the graph..
Pretty much as illustrated in post #6.
The initial position of the weights is all the way in. The spring force holding the weight is determined by the spring rate and how far it is stretched. So even though its a heavier spring, how much force it applies initially can be adjusted by changing the initial tension.
The spring perch is adjustable. If you look close you can see its mounted on an eccentric.
Increasing the primary spring's tension will delay the rpm begins to advance.
The '63 primary spring is made of heavier wire and about the same number of coils, so timing will advance more slowly than the one from the electronic.
Drawn on graph the '63 spring will have an advance something like the light blue lines and the new primary spring like the dark blue from 300 to 800 rpm
As the rpms increase, the weights move further out and eventually engage the secondary springs.
The inside length of the secondary spring and the spring perch position will determine how many degrees advanced before it engages.
Eyeball guess is the new secondary spring is longer and therefore will allow more advance before engaging.
It has less coils so will have a higher spring rate and slow the advance more.
On the graph the secondary springs help slow the advance which will continue until the slots stop the weights at 11.5* for the early distributor and 13* for shiny new one. For a clearer comparison, deleted the minimum specs from the graph..
