Performance Specifications:


Cessna 340 & 340A
RAM - Series VII RAM - VII 335 hp
Engine Model: TCM TSIO-520-NB RAM Overhauled
Horsepower: RAM STC - 310 to 335 hp 335 hp
Time Between Overhauls - TBO 1600 hrs.
Fuel Capacity with use of Auxiliary Tanks 163 gallons

Takeoff - Manifold Pressure @ 2700 rpm 38" MP

Runway Acceleration: 0 to 100 mph 15 seconds

Single Engine Climb: 355 fpm

Cruise Climb Power: 2500 rpm / 33.0" MP

Cruise Climb: Sea Level to 23,000 ft. 23 minutes

Cruise Speed and Fuel Flow at 260 hp Cruise Power @ 23,000 ft. 232 ktas / 267 mph 20. 3 gph / engine

Cruise Speed and Fuel Flow at 230 hp Cruise Power @ 23,000 ft. 219 ktas / 252 mph 17. 9 gph / engine

Cruise Speed and Fuel Flow at 200 hp Cruise Power @ 23,000 ft. 205 ktas / 236 mph14. 7 gph / engine

Useful load increased by an additional:
Cessna 340
Cessna 340A + 395 lbs.
+ 380 lbs.
Ramp weight.: Cessna 340 & 340A - RAM 6,430 lbs.
Gross weight.: Cessna 340 & 340A - RAM 6,390 lbs.
Landing weight: Cessna 340 & 340A - RAM
6,075 lbs.
Zero fuel weight: Cessna 340 & 340A - RAM 5,630 lbs.

RAM - Series VII
Additional Information

TA81 Airesearch Turbo: 17 in³ Compressor - (vs. original 10 in³)
Larger Intercooler - 140 in³ - with improved construction
RAM Intercooler Scoop - low profile - minimum drag.
Additional cooling air exit - at wastegate access panel
Takeoff power - available through 25,000 ft.



RAM’s Series VII Split Inlet Scoop is optimized for minimal aerodynamic drag at high cruise speeds.
Airsearch TA81 turbocharger has a larger 17 cubic inch
compressor, which is redlined for 1750°F.

Other Turbochargers, Intercoolers,
and Intercooler Scoops

Cessna, American Aviation, and RAM’s 325 hp Series IV use an Airesearch TH08A turbocharger utilizing a 10 in³ compressor, redlined at 1650°F.
Cessna Intercooler is 105 in³. AA Intercooler is 140 in³. Both are found on Cessna 310 hp and RAM’s 325 hp Series IV.