Due to the variations in fuel blends available across the nation, I tested them at two different Specific Gravities (sg). One was 0.685sg and the other was 0.770sg. By doing this, it covers most of the ranges of available fuels.
Just for further reference, on the day they were tested, I also measured some fresh 87 Octane regular unleaded fuel and it measured 0.725sg.

The common conversion factor of 10.5 was used to convert mL/min into Lb/hr.

Following is the test data....

Test date: 8-21-05
Time: 15:30
Fluid Temperature: 69F
Barometric Press: 29.99
Relative Humidity: 53%
Altitude: 940ft above sea level

Injector #280 155 931 GM #12561462
60 Second static flow test @ 0.685sg @ 3Bar = 270mL divided by 10.5 =
25.714 Lb/hr
60 Second static flow test @ 0.685sg @ 4Bar = 315mL divided by 10.5 = 30.00 Lb/hr

60 Second static flow test @ 0.770sg @ 3Bar = 255mL divided by 10.5 =
24.285 Lb/hr
60 Second static flow test @ 0.770sg @ 4Bar = 297mL divided by 10.5 =
28.285 Lb/hr

Injector #280 155 890 GM #12555894
60 Second static flow test @ 0.685sg @ 3 Bar = 250mL divided by 10.5 =
23.809 Lb/hr
60 Second static flow test @ 0.685sg @ 4 Bar = 295mL divided by 10.5 =
28.095 Lb/hr

60 Second static flow test @ 0.770sg @ 3Bar = 240mL divided by 10.5 =
22.875 Lb/hr
60 Second static flow test @ 0.770sg @ 4Bar = 275mL divided by 10.5 = 26.190 Lb/hr

As you can see from the test results, the flow rate of the injector varies considerably depending on the specific gravity of the fuel and also the pressure they are operating at. Other factors such as the temperature, barometric pressure, humidity, test altitude and the test equipment all have to be taken into consideration when testing injector flow. Given that, I performed these tests twice, on two of my flow benches and the results remained consistent each time.

This is not an exact science due to all the variables involved. Because all injectors are manufactured within a range of tolerances, and in this case only one of each part number was tested, the test results would not necessarily represent what a complete set of injectors would flow. I hope however this provides you with data you requested and that you can use it to help dispel some of the "myths" concerning these injectors.

I'm sure someone out there in "cyberland" will cry "foul" and say the data is biased or untrue. All I can say to that is that I call it as I see it when testing them. I don't sell injectors so I have no "conflict of interest" in recording or reporting data and I'm not interested in debating what injectors are advertised to flow vs what they actually test at.

Originally posted by TheMysticWizard
Okay I have 2 more bits of info relating to this...

I was looking at the injectors and the stock clips... The clips can't be modified to hold the injectors... so I tried to make some clips with little success.

I then decided that it might work out if I cut the grove in the top of the injector so it goes all the way around, like an older style injector. So I tried it, works like a charm.

Then I tried to seat them in the intake while they were clipped in the fuel rail... looked pretty good, but what about flow? Will the intake block the plume of fuel?

I tested that also, no matter how far the injector is in the intake, the plume stayed the same, from all the way seated in the intake, to barely in the intake at all, the intake didn't block the injector.

Looks like I'm going to be fine with these injectors in those 2 respects. We'll see about flow once I get this thing up and running, I have a feeling I will need more pressure to get them to satisify the engine.