great experience so far flying with the eci injection
not very easy nor exactly cheap to install though...
coming up with brackets for the control cables is rather tricky. made one on our own (tech drawing on our website), got one from robbie attaway (attawayair.com)
it's a chicken/egg problem, since you need custom control cables but won't find any control cable specs/throw/distance from rod end to mounting thread from either van's nor spruce. we had the luck of having a sample cable from another builder that had the wrong length. i still can't believe that eci doesn't supply such an important (and safety critical) hardware needed for every integration into an airplane...
also, the instructions regarding the need for a low pressure fuel boost pump are very much cya (cover your a...)...
first, in all the diagrams or their van's install manual, you only find references to the high pressure boost pump as per van's kit and obviously needed for starting/mech pump failure.
yet in the tech install sheet they talk about a need for a low boost pump or an electric pump speed controller...
via email, they however openly admitted that there really shouldn't be a low boost pump as it will actually make the engine run less optimal.
also, the 6port andair valve has a hefty price tag, is very nice though! much better than the default van's faucet style valve.
fabricating the return line itself is rather a piece of cake.
if you can look over these quirks, the system is excellent in a great many respects! read the operating manual where it lists all of the advantages.
operationally, it's awesome.
also, it leaves wide open doors for the use of mogas (less ethanol) or other lower octane fuels due to the much increased margin from vapour lock.
the fuel flow meter however doesn't necessarily need to be installed aft of the firewall (requiring 2 meters and electronic subtraction).
we have ours (afs/e.i. red cube) between the throttle body and the spider mounted to the engine sump with a very rigid bracket. where it works just perfectly.
rgds, bernie