MP DISTRIBUTOR TIMING CURVE 340

4spdragtop said

Looks great Troy. From what I've read/"learned", the VA will have a # stamped on it. Double that # and that's how many crank degrees it ads. The VA adjusts WHEN, not how much timing it ads.
Not sure if that helps.

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Yup...It adds about 20* and is stamped with an 11. I understand the when with regards to the VA can adjustment. The tighter the spring, the more opposing force applied to the diaphragm thus slowing it down as opposed to low tension on the spring doing the opposite.

However, it would appear that you would want a quick application at start up, but you also want it to leave quickly under light acceleration to avoid detonation. Just trying to figure out where the spring tension needs to be.