Another timing curve question
Because it will be very rpm sensitive. Unless - maybe - the weight will be pulling that heavy spring snuggly at idle.
I'm sure you have a loping idle. So as the idle rpm lopes up and down 25 or 50 rpm, the timing will go up and down with it.
I think you've seen this, but maybe not. Its the small block version of the DC tach drive race distributor. The plots in distributor degrees and rpm.
Whenever the engine fall below roughly 800 rpm, the advance drops away like a rock.
So to do what you want, you need a long loop short enough, and a primary spring that's very light with a lot of loops so it doesn't get overstretched at full advance. This is doable. Rotating the spring perches will change the distances a little.
Getting a secondary spring to do that and have an advance that will work with vacuum advance, that may take some more effort and trial and error. There no supply of sorted and organized distributor springs publicly available.
Because it will be very rpm sensitive. Unless - maybe - the weight will be pulling that heavy spring snuggly at idle.
I'm sure you have a loping idle. So as the idle rpm lopes up and down 25 or 50 rpm, the timing will go up and down with it.
I think you've seen this, but maybe not. Its the small block version of the DC tach drive race distributor. The plots in distributor degrees and rpm.
Whenever the engine fall below roughly 800 rpm, the advance drops away like a rock.
So to do what you want, you need a long loop short enough, and a primary spring that's very light with a lot of loops so it doesn't get overstretched at full advance. This is doable. Rotating the spring perches will change the distances a little.
Getting a secondary spring to do that and have an advance that will work with vacuum advance, that may take some more effort and trial and error. There no supply of sorted and organized distributor springs publicly available.