I been trying to find what the required instruments were for a 1952 Cessna 170B with the Avcon 180hp conversion are. Any help is appreciated. Thanks Gary

Pretty sure all that is added is manifold pressure gauge for prop operations if using a constant speed..

Brian.

Delaire uses Mooney MP/Fuel pressure combined. Tach markings may need Prop limitations for Hartzell.

Gary, first, here's the required instrumentation from FAR 91.205 for basic VFR and VFR Night:

(b) Visual-flight rules (day). For VFR flight during the day, the following instruments and equipment are required:

(1) Airspeed indicator.

(2) Altimeter.

(3) Magnetic direction indicator.

(4) Tachometer for each engine.

(5) Oil pressure gauge for each engine using pressure system.

(6) Temperature gauge for each liquid-cooled engine.

(7) Oil temperature gauge for each air-cooled engine.

(8) Manifold pressure gauge for each altitude engine.

(9) Fuel gauge indicating the quantity of fuel in each tank.

(10) Landing gear position indicator, if the aircraft has a retractable landing gear.

(11) For small civil airplanes certificated after March 11, 1996, in accordance with part 23 of this chapter, an approved aviation red or aviation white anticollision light system. In the event of failure of any light of the anticollision light system, operation of the aircraft may continue to a location where repairs or replacement can be made.

(12) If the aircraft is operated for hire over water and beyond power-off gliding distance from shore, approved flotation gear readily available to each occupant and, unless the aircraft is operating under part 121 of this subchapter, at least one pyrotechnic signaling device. As used in this section, “shore” means that area of the land adjacent to the water which is above the high water mark and excludes land areas which are intermittently under water.

(13) An approved safety belt with an approved metal-to-metal latching device, or other approved restraint system for each occupant 2 years of age or older.

(14) For small civil airplanes manufactured after July 18, 1978, an approved shoulder harness or restraint system for each front seat. For small civil airplanes manufactured after December 12, 1986, an approved shoulder harness or restraint system for all seats. Shoulder harnesses installed at flightcrew stations must permit the flightcrew member, when seated and with the safety belt and shoulder harness fastened, to perform all functions necessary for flight operations. For purposes of this paragraph -

(i) The date of manufacture of an airplane is the date the inspection acceptance records reflect that the airplane is complete and meets the FAA-approved type design data; and

(ii) A front seat is a seat located at a flightcrew member station or any seat located alongside such a seat.

(15) An emergency locator transmitter, if required by § 91.207.

(16) [Reserved]

(17) For rotorcraft manufactured after September 16, 1992, a shoulder harness for each seat that meets the requirements of § 27.2 or § 29.2 of this chapter in effect on September 16, 1991.

(c) Visual flight rules (night). For VFR flight at night, the following instruments and equipment are required:

(1) Instruments and equipment specified in paragraph (b) of this section.

(2) Approved position lights.

(3) An approved aviation red or aviation white anticollision light system on all U.S.-registered civil aircraft. Anticollision light systems initially installed after August 11, 1971, on aircraft for which a type certificate was issued or applied for before August 11, 1971, must at least meet the anticollision light standards of part 23, 25, 27, or 29 of this chapter, as applicable, that were in effect on August 10, 1971, except that the color may be either aviation red or aviation white. In the event of failure of any light of the anticollision light system, operations with the aircraft may be continued to a stop where repairs or replacement can be made.

(4) If the aircraft is operated for hire, one electric landing light.

(5) An adequate source of electrical energy for all installed electrical and radio equipment.

(6) One spare set of fuses, or three spare fuses of each kind required, that are accessible to the pilot in flight.

In addition, IF the 180 HP conversion you used requires an engine driven fuel pump and a backup electric fuel pump, the plane will be required to be equipped with a fuel pressure gauge.

Note that some of the "everything in one gauge" units (like the EDM 900) can legally replace a number of the stock gauges, whereas others (Like the EDM 800, for example) are not legal replacements for required instruments.

As someone noted, depending on the propeller installed, you MAY have to have the tachometer marked with "restricted operating range" called out for that engine/prop combination.

MTV

Thanks to all

Mike, that was what I was looking for.

Are some of these considered Primary vs. secondary?

I am looking at adding a CGR-30P and seems oil temp may be secondary. and I have a stand alone electric fuel gauge showing fuel quantity in each tank.

I am assuming fuel pressure may be primary??

Thanks
G

shortfielder wrote:Thanks to all

Mike, that was what I was looking for.

Are some of these considered Primary vs. secondary?

I am looking at adding a CGR-30P and seems oil temp may be secondary. and I have a stand alone electric fuel gauge showing fuel quantity in each tank.

I am assuming fuel pressure may be primary??

Thanks
G

Everything that’s “required” is considered “primary”.

The list I provided is what’s required by the FAA as a bare minimum. Take a look at the requirements on the C-170 TC and the engine STC, those will also be considered required.

MTV

Thanks Mike
G