Are my calculations right?

- Static Injector Flow Rate @ 43.5PSI (300kPa): 51.72 lb/hr = 6.52g/s = 544cc/min (+/-3%)
- n-Heptane = 0.684g/cc
- Stock 3 bar (43.5114) still in place, thus no calculations must be made for different operating vs. rated pressure
-actual engine displacement = 1781 cc = 1.781 L.
-number of cylinders = 4

Conversion given n-heptane:
544 x 0.684 = 372.096 g/min

-50.2624*(1.781/4)/372.096
--50.2624*0.44525/372.096
---22.3793336/372.096
----0.06014

Is this right?  KRKTE = 0.06014

Just kinda throwing this out there as I would like to know a little of the science behind this. Why do we multiply the injector sizing, such as a 550cc, times the density of n-heptane. If n-heptane is roughly 95% of gasoline why do we calculate the difference at 68.4% instead of at 95% for loss for density?

Why is it   : 544*0.684 = 372.1cc
instead of : 544*0.950 = 516.8cc

Density of n-heptane is 0.684g/ml
Density of gasoline is 0.720g/ml
Given that n-heptane is 95% the density of gas.