Looking for a reality check here. Are springs/weights from a points dizzy compatible with an HEI dizzy?
Working with a fresh '64 292 and finally tracked down an OEM HEI from a 70's 250. The 292 advance curve is retarded for longer before sweeping up to full advance very quickly thus preventing detonation at lower RPM's on the longer stroke of the 292 (this is a big bolt lugging motor, not a hotrod). The 250 sees advance earlier in the power band with a more linear application up the power curve. I cannot verify (my scale is broken) if the 292 weights are actually heavier than the 250. I have a points dizzy from the 292 and then the HEI dizzy from the 250.
I can verify that the 292 (points) weights fit in place of the 250 (HEI) weights, but the 292 weights look as if to give more total mechanical advance than the OEM 250 weights do. The 250 weights have thicker fingers vs the 292 weights which have thinner, thus allowing further centrifugal travel resulting in a higher top end advance. Intuitively, I would assume that the weights are not compatible without modification to prevent the excessive mech. advance, of which would defeat the purpose of using the weights as they would then be modified and no longer stock weight. The 250 and 292 have roughly the same RPM limit correct? Thus, both should have the same total possible mechanical advance, just differing curves?
I Have a recurve kit on the way for the springs as all the recurve kits I see are for v8's and I am assuming those weights are less desired than the 250 weights. Pairing the heaviest springs with the 250 weights "should do" for the 292. No amount of searching has been able to turn up OEM 292 HEI weights.
I've been digging the internet, Stovebolt, Inliners, etc for a few weeks and haven't turned up a solid answer. I've also been talking with Hotrod Lincoln and picking his brain as well on this topic. Figured I would post it up for others to chime in on and possibly help others in similar position in the future.
