I find the gram/cyl scale for the spark tables not very
intuitive. I worked for a long time with lb/min.

Is this conversion right:

40lb/min of air at 6000rpm -> 3000engine fillings with air

40 x 450 g = 18000g / min

for one revolution -> 18000/3000 = 6 grams for all cylinders

so 6 grams /8 = 0.75grams/cyl when the MAF sees 40lb/min at 6000rpm.

Gert