Airframe Type: The document provides specifications for the X-340CC engine, which is ASTM certified and designed for experimental aircraft.

Performance: The engine offers a maximum continuous horsepower of 156, with options for 166 and 180 HP. It operates at a maximum RPM of 2,700 at full power and has a recommended TBO (Time Between Overhaul) of 2,400 hours.

Engine Specifications: The engine features 4 cylinders, a bore of 5.125 inches, a stroke of 4.125 inches, and a displacement of 340 cubic inches. The compression ratio options are 7.0:1, 8.5:1, and 9.0:1. The maximum cylinder head temperature (CHT) is 475°F, with a recommended maximum cruise CHT of 425°F.

Spark Plug Boss: The engine accommodates 18mm and 14mm spark plugs.

Fuel: The engine supports both carburetion and fuel injection, with recommended aviation fuel grades of 93, 100, and 100LL octane.

Dimensions: The engine measures 20.36-23 inches in height, 32.27 inches in width, and 29.07 inches in length.

Weight: The estimated dry weight of the engine is 245 lbs.

Oil Temperature and Pressure: Normal operating oil temperature ranges from 180°F to 245°F, with oil pressure specifications of 90 psi maximum, 60 psi minimum, and 25 psi at idling.

Engine Mount: The engine can be mounted using Dynafocal Type 1 or Conical mounts.

Propeller: The engine supports both constant speed and fixed propellers.

Prop Governor: Located at the right rear of the engine.

Crankshaft: Features a flange that is .38 inches thick, with prop bolt sizes of 7/16 or 1/2 UNF. The oil capacity is 8 quarts.

Induction Plenum and Sump Options: The engine offers warm/cold induction plenum options and is available in magnesium or aluminum sump materials.