Car runs relatively well, but noticed that by ignition divide by is currently set at 2. Is this appropriate for using stock coils/cas? In the E6K manual it refers that a rotary should use Ign/By setting of 1.

 

I believe it has to do with how many times the injector is fired per crank revolution. but since rotaries are weird...
Best to leave it at 2 and stick with the known. I've read if you switch to 1, you have to redo the fuel maps.
I am no expert but I'd say "if it ain't broke, don't fix it"

 

Any other inputs? I'm wondering if more frequent injector pulses would help with my transient throttle behavior.

 

feel free to try it, i've done it and its just too much fuel/didn't work for me, the car would just blow smoke rings.

 

if you set it to 1, injectors will fire twice as often, and you will have to take 50% out of your fuel map. if youre running big injectors, this may make the p/w too short, and will make injector dead time more of an issue