MSD 7531 PROGRAMING TROUBLE, HELP!

Bewy said
The GM HEI system changed the goal posts for inductive ign. It used IC control and variable dwell to extend the rpm range. The MSD 6 ign was initially a failure because of the extremely short spark duration, about 1/10th that of ind ign. ran rough & misfired at lower rpms. Some bright spark [ pardon the pun ] at MSD said: We will make it multi spark at low rpms. So an engineering failure was converted to success with marketing hype!

Dr. Hugh Holden [ www.worldphaco.net ] did extensive testing & research on HEI [ MDI ] & CD igns & did a comparison of both. [ might be a bit hard for you to understand RB, some words have more than five letters ]
Results/summary are below:

View attachment 1716094475

That's funny. Bruce figured out that at higher vaporization rates and higher compression ratio's the Inductive ignition couldn't cut it as the better mixture required a stronger spark that's why he advocated for CDI. We are talking High Horsepower to Cubic inch power ratios in street and racing applications. What happens in the cylinder is very different to what happens on a work bench.