Hi,
I?ll give you some un-biased opinions (we?re not too biased about our products (of course we are, they're the BEST), but just the facts).
I?m not too familiar with the Simmons Injection installation, so if your installation is already running there may be some air inlet modifications required to make the system fit. Our kits are fairly aircraft specific, so if your engine has an updraft sump like a carbureted engine, our kit would bolt on. The preferred location of the injector nozzles on your installation would be in the tops of the cylinder heads, since I assume your engine is down draft cooled. Again our kit has all the necessary brackets, mounting hardware injector nozzles and nozzle lines to mount these parts on the top of the engine. The RV-360 kit positions the air box mount plate in the identical position as a MA4-5 carburetor. So if your inlet for the Simmons injector is presently connected to some type of air box and the distance is different than above there may need to be some adjustment to the air inlet on the cowl. The engine driven fuel pump would have to be changed to something that provided 25 PSI. I do not know if your accessory section will accept the standard diaphragm pump, although it may be possible to modify the Simmons pump to work, or install a Romec vane pump in the same location. You would be required to run a high pressure electric boost pump (provided in the kit) and install a #4 purge return line to one of your tank feed lines (if your present system already has a fuel return to a tank, you could use that for the purge return). The standard kit we have for a Lycoming 360 RV-4 installation is P/N 8000010. This kit is $3248.64. It comes with the fuel control unit, sump adapter, throttle and mixture control cable brackets, fuel hoses, purge valve/flow divider assembly, injector nozzles, nozzle lines, mounting hardware kits, air box mount, high pressure electric boost pump and fuel filter. This would be a bolt on kit in a RV-4 for a standard Lycoming O-360 A1A using Van?s filtered air box with the injector nozzles installed in the tops of the cylinder heads. If your engine is different from this configuration, we can modify the kit and reconfigure the components as necessary.
Don