Changing distributor mechanical curve.

[69427]

Okay guys, I'm admitting my ignorance on an ignition topic. (Be kind. :amused: ) I'm planning some tweaking of the ignition curve on my bigblock. I want to add a couple extra total degrees (easy enough), but I want to add significantly more advance on the lower end. Essentially I just want to reduce the total mechanical curve. Is the curve "magnitude" limited by the shape of the weights, or by the pin bushing?

I'm just kicking around ideas to see if I can get a touch more top end power with a bit more advance (if it likes it), and also a bit smoother idle/drivability by adding a "bunch" more low end advance.

Thanks for the info.
Mike

 

[mrvette]

Bird is the word on that stuff, Mike....

he got all the parts and shit to make it all come together....

he be along shortly I"d imagine....

 

[big2bird]

Okay guys, I'm admitting my ignorance on an ignition topic. (Be kind. :amused: ) I'm planning some tweaking of the ignition curve on my bigblock. I want to add a couple extra total degrees (easy enough), but I want to add significantly more advance on the lower end. Essentially I just want to reduce the total mechanical curve. Is the curve "magnitude" limited by the shape of the weights, or by the pin bushing?

I'm just kicking around ideas to see if I can get a touch more top end power with a bit more advance (if it likes it), and also a bit smoother idle/drivability by adding a "bunch" more low end advance.

Thanks for the info.
Mike

The bushing is what limits the mech advance. Larger bushing=less mech advance.
You are looking to create a "skip" curve. Best done with a Sun machine.