looks like you are having fun.
I have been reading up on injector sizes, and up until now the only information that i had was from SDS, and they mentioned that the smallest injector they sell is the 300cc/min

"Our system is batch fired so no need to time the injector open timing to
the piston position.

If we supplied injectors, they'd be 300cc/min. which is the smallest we
stock and the same size we use on a similar displacement Rotax 912 engine."
the displacement for the rotax 912 is 82.6cu.in. /1352cc's

i have been plugging the 084 engine specs into a couple of different sights that i have found on the web, and i am getting size close to what you are going with, and if i plug in only 1 injector i am getting close to what SDS recommends,
But when i look at the SDS web page they have 4 ea. injectors. http://www.sdsefi.com/rotax.htm

anyway i am just trying to understand the math behind all of this, and at the moment, i see i know enough to only get in trouble.

would you be willing to share some insights of what your opinion might be, where the injector calculators are going with around 90cc/min, and where this company is recommending a much larger injector?
the one given, is that the Rotax 912 has about twice the HP. but up until now i was just thinking all i would need to do, was lower the mapping values.
thanks