Low RPM stumble

TrailBeast said

"Recurved" is a suspect for idle problems also.
Do you know what springs were used, and if the total timing was limited in it?

Click to expand...

I like to "map" my distributor curves. It's easy to do with an advanced timing light. Start at idle and go every 250 RPM until 3000 RPM.

Then I can graph them in Excel and compare one to the other and see what the different spring combo's do...