CHAPTER 8. ENGINE TEST AND ENGINE CONTAINER

CHAPTER 8

E N G I N E TEST AND ENGINE CONTAINER

Section I. ENGINE TEST AND ADJUSTMENTS

8-1. Engine Specifications

g . B l o w - b y P r e s s u r e . W i t h engine under full

t h r o t t l e and full load, blow-by shall not exceed

a. Speed Range. The engine must operate

18 cfm.

satisfactorily under all loads through a speed

Lubricating Oil Temperature.

Tem-

range of 1400 to 2400 rpm and must idle

p e r a t u r e of oil in the engine pan sump shall not

satisfactorily at 675 to 725 rpm.

exceed 230 F. Temperature of oil entering the

b. Gross Horsepower (Without Accessories).

e n g i n e through the oil pump shall be maintained

Under full throttle setting, engine will develop

between 160F and 22F.

750, plug or minus 15, gross horsepower at 2400

i. Oil Pressure.

r p m , using fuel conforming to specification VV -

(1) Engine oil pressure shall not be more

F-800 (DF-2) and the correction factors

t h a n 70 psi or less than 40 psi when engine is

provided in tables 8-2 through 8-5.

operating at 2400 rpm, and shall not be less than

c. Gross Torque (Without Accessories).

1 5 psi when engine is idling at 675 to 725 rpm,

Under full throttle setting, engine will develop

m e a s u r e d at and / or adjacent to the oil pressure

t h e following gross torque using fuel conforming

s e n d i n g unit, with the oil temperature of 160F

to Specification VV-F-800, DF-2.

t o 180F, using engine oil specified in paragraph

(1) 1720 lbs/ft. - plus or minus 2.0%

d, above.

@ 1800 rpm.

( 2 ) Piston oiler nozzle oil pressure shall be

(2) 1635 lbs/ft. - plus or minus 2.0%

3 5 psi minimum at 2400 rpm measured at plug

@ 2400 rpm.

on left side of crankcase, at rear, above starter.

d. Oil Consumption. Engine shall not con-

j. Temperatures. T h e p r e f e r r e d i n d u c t i o n a i r

sume more than 0.0075 pounds per brake

inlet temperature is 85F plus or minus 10 F.

h o r s e p o w e r hour (lbs / bhp / hr) of lubricating

k. Fuel Pressure. The fuel pressure at the

oil when operating under full load and using

i n j e c t i o n pump inlet shall be 30-40 psi at engine

engine oil conforming to Military Specification

speeds of 1800 to 2400 rpm.

MIL-L-45199 Grade 2 (SAE 30).

Manifold Pressure.

Intake manifold

e. F u e l C o n s u m p t i o n ( W i t h o u t A c c e s s o r i e s ) .

pressure rise above atmospheric after the tur-

W h e n operating at full throttle under full load,

bosupercharger with boost, shall not exceed 35

on a dynamometer, at a speed of 2400 rpm,

inches Hg.; without boost 28 to 32 inches Hg.

engine shall consume not more than 0.420

V a r i a t i o n between left and right banks shall not

pounds per brake horsepower hour (lbs /

exceed 4 inches Hg.

bhp / hr) fuel conforming to Specification

Exhaust Smoke Density Test.

The

VV-F-800 (DF-2).

maximum exhaust smoke density at full power

f. Exhaust Gas Temperature. E x h a u s t g a s

p o s i t i o n , when measured within one foot of the

temperatures, measured at individual cylinder

exhaust outlet, shall not exceed the following

ports, shall not exceed 1250" F. Temperature

conditions when using fuel in accordance with

variation between cylinders shall not exceed

grade DF-2 of Specification VV-F-800.

150F.

8-1