Just a small intro on the test setup. It consist of my netbook running a simple C program based on libftdi. It is using bitbang mode through a Sparkfun ft232r FTDI adapter to a driver board (thanks Peter!!).
Next is the injector setup. I made a small rig holding a slightly modified Z22SE fuelrail. It has the middle pipe removed and a damper fitted at the side. So it basically is a dead end fuel rail. For injectors the 2 on the left are the standard 2.2 injectors, the right 2 are the standard LSJ injectors. None of the injectors have been cleaned, just stock second hand :)
On the gas tank I fitted a fuel pressure regulator. It is set at 3.8 bar for this test as that is the standard fuel pressure on the Speedster. As this is a flow test at 100% dutycycle there is no point increasing the pressure to compensate for manifold vacuum.
As a fuel I used white spirits, which seems to be a pretty standard fluid to use when testing injectors. I tested the injectors 5 seconds a piece at 100% dutycycle. I didn't test them simultaneously to prevent any problems in pressure drop.
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After the test I read the scales on the measure cylinders.
Injector 1 (standard z22se)
Injector 2 (standard z22se)
Injector 3 (standard LSJ)
Injector 4 (standard LSJ)
For this test the number of ml per injector were:
<a href="http://www.verboom.net/projects/speedster/injectors/index.html">Injectors</a>
One uncertainty has always been the 352cc/min the LSJ's are rated for. Some sites say it is at 3.0 bar some at 3.8 bar. It looks like it is 352cc/min @ 3.0bar.
