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Firewall Forward Planning

Before hanging the engine, we have to do some planning. We don't want to be ending up having to remove and remount it over and over again. Quite tough to keep the overview among all the fittings and ports. Also some of them are standard Lycoming, so Van's plans will work while other things are either Mattituck or custom ECI parts which are different from standard and will require individual addressing.

Parts / ports descriptions:
1. Oil Filter mounted on a custom 90° adapter. Giving better clearance as well as making oil changes less of a mess.
2. Vacuum pump pad. Unused, no vacuum system so it's closed off. Could be used for a backup alternator.
3. P-Mag electronic ignition. Just to the left of the number, one can barely see the manifold pressure nipple that needs to be plumbed.
4. Oil fitting going to the oil cooler.
5. Oil Temperature sensor fitting.
6. Slick standard mag
7. Air intake going to the cylinder.
8. ECI Mechanical Fuel Injection Vapour Separator and Fuel Pump. Left fitting is Supply line, right fitting is return line to the tanks, bottom visible fitting is pressure to the throttle body.
9. PCU5000 prop governor.
10. Oil level dipstick, will yet have to be marked.
11. Oil Pressure Port, just to the left of the number, the small black plug will be replaced by a restrictor fitting and connected to a hose and a pressure sensor.

One major problem vs a standard setup comes from the control linkages / cables. Will have to figure a way to hook up the control cables with brackets to both the governor and the mixture.

1. Is the breather tube port. Allowing for ambient air pressure changes within the engine case as well.
2. Fitting for the oil line coming from the oil cooler.

Both the fuel pump and the prop governor stick out quite a bit towards the back. Although initial measurements suggest that the firewall recess won't be fully filled out.

A cylinder from the bottom. The large caplug is where the exhaust will be mounted. Centered and angled is one spark plug, the port on the bottom is the cylinder head temperature sensor mount.

1. Throttle Body / Fuel Metering, will have to be adapted to the Van's Filtered Airbox.
2. Throttle Lever. Making a control linkage for that is one of the main challenges i can currently see.
3. Fuel line from the throttle body to the injection spider on top of the engine. In between a fuel flow sensor will have to somehow be mounted.
4. Sky-Tec Starter
5. 60A Nippon Denso internally regulated alternator
6. Starter gear, to which the propeller will be mounted.
7. Inter Cylinder Baffles. Very important for proper cooling/airflow over the cylinders.

Space will be precious, once all the cables, lines etc... are installed. Also the engine mount will be somewhat in the way but can also be used for supports.

1. Breather port
2. Mechanical tach sensor port (under the black rubber cap)
3. Oil port to the cooler
4. Oil port from the cooler
5. Oil pressure sensor mount
6. One of the 4 holes through which the engine is mounted to the firewall.

1. Oil pressure setting.
2. Oil pressure port
3. Mechanical Tach Drive connection
4. P-Mag electrical connectors and fins which will additionally be cooled with a blast tube.
5. Fuel Injection fuel spider, distributing the fuel to each cylinder evenly.
6. Tappet tubes that actuate the valves.

1. Oil pickup screen
2. Oil drain plug
3. Prop governor oil line supplying the prop hub.
4. PCU5000 prop governor
5(left). Mechanical fuel pump outlet. Mixed up the numbers.
5(right). Oil sump
6. Cold air induction plenum made from magnesium.

Received the exhaust system from Vetterman.

Wondering how it will look installed ;-)

To bridge some time without having a helper, started on the gear leg fairings as well.

Cut the template from an unused firewall forward plan... RV-8 carbureted i think ;-)

Used electrical tape to mark the trailing edge alignment.

And rough initial fitting.

Also, anticipating the need for some form of ground power during the wiring / electrical installation, modified an old PC-power supply. Should be good for a bit less than 12V and about 9Amps or so.

 


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