Also many ignition boxes will retard the timing at higher RPM's and that is the reason for lost power not spark intensity.
Is this common with MSD's or you are talking about your cheaper systems Crane/Mallory boxes never herd before
A whole lot of people don’t know this or check this, or are capable of checking this.
Most modern EFI control boxes address this with a comp table. Usually only happens with mag sensors.
No way I would spend the money on a Digital 7 when there are much better and reliable options out there, and your current ignition is working fine.
Others opinions have merit, but I see no reason to dive in half way.
with this statement but I'm in a position to upgrade my box at a decent price with room for growth
( more options) right now seeing the only thing that's different from my digital 6 is hotter mj 's (130 verse 190) and the data logging etc.
We picked up a little ET retarding the timing 2 degree's from 5000 to 7500RPM, from a 35 degree base, easy to do using a grid.
Theoretically, the older analogue Ignition units should have more of an issue with latency / propagation delay due to the components and the design used. Digital stuff is way quicker in this respect so intrinsically more accurate at maintaining a requested timing curve.
A hotter spark (more energy) helps at the top end as the primary / secondary coil field doesn't have time to drop to zero at high RPM (field collapse, de-saturation of the coil). In effect your spark gets weaker as the change of field is less, especially true if you have only one coil feeding multiple cylinders. it's physics, you can't get away from it, the square type coils suffer from this less than the canister types due to a more efficient design so I'm led to believe.
Just my 2 penneth, not wishing to start an argument here just a reasoned discussion
