<<The decreased fuel flow in cruise will cover their cost in about 300
hrs.>>

I would certainly like to see real data on this, for both single electronic
and dual electronic systems.  How much BSFC improvement is there to be had
by advancing only one of the sparks?  Both of the sparks?  I'm thinking of
manifold pressures of 20 inches or lower.  Has anyone done a real dyno test
to get this data?  How about a timing sweep under these conditions?

Gary Casey