3.3.5 Fuel. Fuel shall be No. 2D of A-A-52557 or JP-8 of MIL-T-83133.
3.3.6 Coolant. Engine coolant shall be protected against freezing down to -25 degrees
Fahrenheit (°F). Operation at full load throughout the speed range in ambient temperatures of
+125°F shall not cause overheating or boiling of the coolant (see 3.4.10 and 22.214.171.124).
3.3.7 Oil. Lubricating oil shall conform to MIL-PRF-2104.
3.4 Performance. Except as otherwise specified herein, the engine shall meet all
performance requirements as specified in 3.4.1 through 3.4.14.
3.4.1 Limiting operating temperatures. Oil sump and engine coolant temperatures when
operating at full load throughout the speed range under any of the conditions specified herein shall
not exceed 235°F and 190°F respectively (see 4.5.3).
3.4.2 Exhaust. The engine shall operate at all conditions with an exhaust back pressure
less than 3.0 inches of mercury (in. Hg) (see 4.5.3).
3.4.3 Idle speed. The engine shall maintain an idle speed of 650 to 700 revolutions per
minute (rpm) (see 126.96.36.199).
3.4.4 Governor. The governor shall limit maximum engine speed at full load and no load
operation to 2775 to 2825 rpm, and 2940 to 2990 rpm respectively (see 188.8.131.52).
3.4.5 Dynamometer performance. The engine at the full rack setting shall meet the
performance specified in 184.108.40.206 through 220.127.116.11 when corrected to standard conditions (see
18.104.22.168 and 6.3).
22.214.171.124 Torque. Torque at the flywheel shall be not less than 595 pound-feet (lb-ft) at an
engine speed of 1600 rpm (see 126.96.36.199).
188.8.131.52 Brake horsepower. The engine shall develop at least 264 gross brake horsepower
(bhp) at a speed of 2800 rpm (see 184.108.40.206).
220.127.116.11 Fuel consumption. Fuel consumption shall not exceed 0.365 and 0.381 pounds
per brake horsepower-hour at 2200 and 2800 rpm respectively (see 18.104.22.168).
3.4.6 Exhaust smoke density. Exhaust smoke density at full rack position, through the
speed range of 2000 to 2800 rpm when measured within 3 feet (ft) of the turbocharger outlet,
shall not exceed a number 3 (light gray) smoke condition as defined in 22.214.171.124.
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