[Grady Clay]

Brian,

Your measurements:
1: 102g
2: 101g
3: 102g
4: 100g
5: 100g
6: 102g
Mean of 101.17 g, standard deviation of 0.98 g.

Considering cylinders 1-2-3 only:
Mean of 101.67 g, standard deviation of 0.58 g.
Considering cylinders 4-5-6 only:
Mean of 100.67 g, standard deviation of 1.15 g.

Compared to the mean, the 1-2-3 side is +0.49% of the mean.
Compared to the mean, the 4-5-6 side is -0.49% of the mean.
The ‘worst case’ cylinders (1,2,5) are -1.16% of the mean.
“+” is ‘rich’ and “-“ is ‘lean’.

The question is:
Is a L-R 1% difference in fuel flow significant for a visible difference in combustion mixture?


I would like to see more data, greater sample size (1 kg, ~1.3 l) and greater precision (measure to 0.1 g).
A major consideration when measuring gasoline is evaporation during the experiment.




Working with gasoline is VERY DANGEROUS!
Take every possible precaution.

REPEAT

Working with gasoline is VERY DANGEROUS!
Take every possible precaution.
Do this outside, away from structures.
Wear your Nomex. A burn injury is most devastating.
Have the rear of the 911 down-wind.
Disconnect the CDI.
Have two friends with large fire extinguishers positioned up-wind.
Much more is not ‘too much’.

Best,
Grady