Sifting through the cold flow test data

The results from the testing extravaganza are in:

Fuel Flow Tests
Test	Pressure	Start Weight	Final Weight	Time	Flow Rate	Adjusted Flow Rate
	[psi]	[g]	[g]	[s]	[kg/s]	[kg/s]
1	400	166.25	453	27.94	0.0103	0.0115
2	400	166.5	455	29	0.0099	0.0112
3	400	166.5	455	46.61	0.0062	0.0070
4	400	166.2	444.4	40.05	0.0069	0.0078
5	400	166.3	363.5	28.24	0.0070	0.0078
6	400	166.3	456.3	26.65	0.0109	0.0122
7	400	166.4	463.6	37.12	0.0080	0.0090
					Avg Flow Rate	0.0095
					Stdev	0.0021
Oxidizer Flow Tests
Test	Pressure	Start Weight	Final Weight	Time	Flow Rate	Adjusted Flow Rate
	[psi]	[g]	[g]	[s]	[kg/s]	[kg/s]
1	400	166	454.2	2.17	0.1328	0.1237
2	Invalid
3	400	166.1	366.7	2.09	0.0960	0.1078
4	400	166.2	366.7	1.75	0.1146	0.1287
5	400	166.2	366.7	1.76	0.1139	0.1280
					Avg Flow Rate	0.1221
					Stdev	0.0097

My design flow rate for the fuel and oxidizer are 0.0205 and 0.118 kg/s, respectively. I am in pretty decent shape when it comes to my oxidizer. I just need to get that new nozzle ordered. 

The I bought my nozzles from McMaster Carr where there is a wide variety to choose from. To be sure I am choosing the correct nozzle. I converted my flow rates to gallons/hour to match their website's data. Fuel being 24.8 gph.

Three of the nozzles I considered come with flow rate data which I adjusted for the specific gravity of my fuel:

Test Pressure	Water Flow Rates			Adjusted for IPA Flow Rates
[psi]	[gph]			[gph]
Nozzle	1	2	3	1	2	3
40	3.16	6.32	9.49	3.55	7.10	10.66
100	5	10	15	5.62	11.23	16.85
500	11.18	22.36	33.54	12.56	25.12	37.68

To make it easier to look at I made a graph:

One major factor I have to take into account is the fact that I am not dropping from 400 psi to atmosphere. I am dropping to 300 PSI in the chamber. This means I will have to choose a nozzle that will give me a flowrate of 24.8 gph at the pressure differential seen from the injector to the chamber. ~100 psi is safe but I can always go higher. This means nozzle 3 is the only thing that will put me near that range. 

The equation for the dotted line for nozzle 3 - adjusted is y=1.6864*x^0.4999. Solving for where y = the 24.8 gph that I need for my fuel I get an x of  ~216 psi. Meaning my line pressure will need to be 516+ psi.

I will check some other sources to see if I can get a lower pressure differential required before I make a decision.