WAUKESHA ENGINE

P OW E R R AT I N G S

BASIC FORMULAS

English

aukesha Engine manufactures spark

ignited gaseous fueled engines and
Enginator systems for gas compression,
electric power generation, cogeneration and
mechanical drive applications ranging in
output from 160 to 4830 bhp (40-3430 kWe).

Waukeshas manufacturing facility (Waukesha,

Wisconsin) is certified by the worlds leading
registrar, Lloyds Register Quality Assurance
(LQRA), to the ISO 9001:2000 Quality
Management Standard. Regional sales offices
stand ready to serve our customers, distributors, and OEMs.

Waukesha Engines many years of experience

have shown that natural gas engines can
power or drive just about anything. Waukesha
offers a full line of heavy-duty, gaseous-fueled
engines that can be put to work in a variety of
markets including gas compression, electric
power generation, cogeneration, and general
mechanical drive applications (pumps, air
compressors, chillers, blowers).

With a global distribution network, Waukesha

services all major marketing areas. Waukesha
distributors are on call 24 hours a day, with
the parts and service personnel to provide
quick responsive solutions to customers
needs.
Waukesha Engine has found solutions to
almost any customer concern and need. Our
innovative product design improvements keep
pace with customers ever-increasing standards. From demands for higher loads and
speeds, to simple, long-term reliability,
Waukesha understands those needs and continues to design, build, and service the best
engines in the marketplace.

With decades of experience in engine technology together with excellent engineering skills,
Waukesha has found cost-effective solutions
for many customer needs. Customers recognize
that Waukesha engines can power all types of
equipment and do it more cost effectively.

F = (Degrees C x 1.8) + 32
Torque lb-ft =

5250 x BHP
rpm
792,000 x BHP
Displacement (cubic inches) x rpm

BMEP (psi) =

BHP = BMEP x Displacement (cubic inches) x rpm

792,000

Metric
(Degrees F-32)
1.8
kWb x 9550
Torque (Nm) =
rpm
C =

BMEP (bar) =

kWb x 1200
Displacement (liters) x rpm

BMEP (bar) x Displacement (liters) x rpm

1200

kWb =

Displacement

Waukesha Engine Family Ranges

Displacement =

1000

2000

3000

4000

5000

BHP

BHP

BHP

BHP

BHP

BHP

pD2
4

x S x C = 0.7854 D2SC

Where: Displacement = cubic inch.

D = Bore Dia. in.
C = No. of cyl.
S = Stroke in.
p = 3.1416

1565 - 4830
ATGL

Piston Speed

1390 - 4425
APG

Piston Speed = P =

Formulas To Determine kW, KVA,

Reactive KVA, BHP And Amperes
(for three phase AC)

320 - 2560
VHP
160 - 1175
VGF

KVA =

166 - 260

kWe = kWB x Eff

G A S C O M P R E S S I O N A P P L I C AT I O N S
Natural Gas Fueled Engines - Continuous Duty Applications . . . . . . . . . . . . 4-5
M E C H A N I C A L D R I V E A P P L I C AT I O N S
Natural Gas Fueled Engines - Intermittent Duty Applications . . . . . . . . . . . . 6-7
P O W E R G E N E R AT I O N A P P L I C AT I O N S
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8-9
8-9
10
11

A LT E R N AT I V E F U E L A P P L I C AT I O N S
Low BTU Fueled Engines - Continuous Duty . . . . . . . . . . . . . . . . . . . . . . . 12-13
HD-5 Propane Fueled Engines - Continuous Duty . . . . . . . . . . . . . . . . . . . . 14
G E N E R A L I N F O R M AT I O N

1.73 x Volts x Amps

1000

kW = KVA x PF

VSG

Remote Radiator Cooling (kWe)

Engines Only (kWb) . . . . . . . .
Unit Mounted Radiator Cooling
Heat Exchanger Cooling . . . . .

NS Where: P = Ft. per Min.

N = rpm
6
S = Stroke in

Application Guidelines for Altitude and Temperature Adjustments

To Engine and Enginator Systems For Natural Gas, Low Btu
and HD-5 Propane Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15

BHP =

1.73 x Volts x Amps x PF

.746 x 1000 x Eff

kW
.746 x Eff
BHP x .746 x 1000 x Eff
AMPS =
1.73 x Volts x PF
BHP =

kW x 1000
1.73 x Volts x PF
KVA x 1000
AMPS =
1.73 x Volts
AMPS =

Reactive KVA = KVA x

1 - PF2

This Power Ratings Bulletin supersedes all Power Ratings

Bulletins prior to December, 2005.
Waukesha, Enginator, VHP, VGF, ATGL, APG, WKI, and ESM are
trademarks/registered trademarks of Waukesha Engine, Dresser, Inc.

275 millimeter bore

16 V-AT 27 GL
Product Designations

Turbocharged,
intercooled, lean burn

16 Cylinder

Engine Series
Waukesha manufactures five engine families the ATGL, APG, VHP, VGF, and VSG.

Prefix Designations
The prefix attached to an engine model indicates the number of cylinders (except ATGL and
APG which states actual number): P = 16, L = 12, H = 8, F = 6.
VHP L7042GL engine is a 12 cylinder engine
VGF P48 GL is a 16 cylinder engine
16V-AT27GL is a 16 cylinder engine

ATGL Engine Series Models

16V-AT27GL
12V-AT27GL
8L-AT27GL
152 millimeter bore

16 V150LTD

Numeric Designations
The numeric designation in each engine model name indicates the displacement of the
engine model in either English units of cubic inches or metric units of liters.

Lean turbulent
combustion, draw-through

16 Cylinder

APG Engine Series Models

The ATGL series is designated by a numeric indicator of the bore size in millimeters.
For example: the 27 of the 16V-AT27GL indicates a 275 millimeter bore.
The APG series is designated by a numeric indicator of the bore size in millimeters.
For example: the 150 of the 16V150LTD indicates a 152 millimeter bore.

16V150LTD
12V220GL
18V220GL
7,040 in3 displacement

The VHP series show a displacement in cubic inches. For example: the VHP L7042GL
indicates a displacement of 7,040 in3.
The VGF and VSG series show a displacement in liters. For example: the VGF P48GL
indicates a displacement of 48 liters.

VHP L 7042 GL
12 Cylinder

The VSG F11GSI indicates a displacement of 11 liters.

Turbocharged,
intercooled, lean burn

VHP Engine Series Models

Suffix Designations
G
GSI
GSID
LT
LTD
GL
GLD

=
=
=
=
=
=
=

Naturally aspirated
Turbocharged, intercooled
Turbocharged, intercooled, draw-through
Lean combustion turbulence
Lean combustion turbulence, draw-through
Turbocharged, intercooled, lean burn
Turbocharged, intercooled, lean burn, draw-through

P9390GSI, GL; L7044GSI;

L7042G, GSI, GL, GLD;
L5774LT; L5794GSI, LT;
L5790G; F3521G, GL;
F3524GSI; F3514GSI
48 liters displacement

VGF P 48 GLD
Other Waukesha Engine Products

16 Cylinder

Turbocharged,
intercooled, lean burn,
draw-thru

Waukesha Power Systems Enginator Series

VGF Engine Series Models

The Enginator is a Waukesha Engine registered trademark of an engine generator set

packaged by Waukesha Power Systems. WPS also designs and assembles Engomatic
panels (switchgear control systems).

P48GL, GLD, GSI, GSID;

L36GL, GLD, GSI, GSID;
H24G, H24GL, GLD, GSI, GSID;
F18G, F18GL, GLD, GSI, GSID

Custom Engine Controls (CEC) Series

AFM
DSM
IM
TCM
KDM

=
=
=
=
=

Air/Fuel Module
Detonation Sensing Module
Ignition Module
Turbocharger Control Module
Knock Detection Module

11 liters displacement

VSG F11GSI
6 Cylinder

Waukesha ESM

ESM = Engine System Manager

AFR = Air/Fuel Ratio Controller

Turbocharged,
intercooled, rich burn

VSG Engine Series Models

F11GSI, GSID

NAT U R A L G A S F U E L E D
CONTINUOUS DUTY

Engine Family
Model

ATGL

Displacement Bore/Stroke

16V-AT27GL

17,398 in3
(285 L)

10.83 x 11.81
(275 x 300 mm)

12V-AT27GL

13,048 in3
(214 L)

10.83 x 11.81
(275 x 300 mm)

8699 in3
(143 L)

10.83 x 11.81
(275 x 300 mm)

9388 in3
(154 L)

9.375 x 8.5
(238 x 216 mm)

7040 in3
(116 L)

9.375 x 8.5
(238 x 216 mm)

5788 in3
(95 L)

8.5 x 8.5
(216 x 216 mm)

3520 in3
(58 L)

9.375 x 8.5
(238 x 216 mm)

2924 in3
(48 L)

5.98 x 6.5
(152 x 165 mm)

2193 in3
(36 L)

5.98 x 6.5
(152 x 165 mm)

1462 in3
(24 L)

5.98 x 6.5
(152 x 165 mm)

1096 in3
(18 L)

5.98 x 6.5
(152 x 165 mm)

673 in3
(11 L)

5.5 x 5.71
(127 x 145 mm)

8L-AT27GL

VHP

P9390

Engine available with Low

Fuel Pressure System (LFPS)
with the same ratings. Refer
to page 15 for LFPS ambient
and altitude adjustments.

L7042/L7044
2

Engine ratings are

700-1000 rpm for low speed
turbocharger operation and
1000-1200 rpm for high
speed turbocharger operation.

L5790/L5794/
L5774

Gas

F3514/F3521/
F3524

Compression VGF
&
Mechanical

P48

These power ratings require

pricebook option Code 1100
(176 BMEP) and DSM. They
are available continuously
when applied per WKI
Power and Timing Curve
S7079-19. It is permissible to
operate at up to 5% overload
for two hours in each 24 hour
period.

Drives

CONTINUOUS DUTY

4
Inline engine ratings are
1200 - 1400 rpm for low
speed turbocharger operation
and 1400 - 1800 rpm for high
speed turbocharger operation.
Vee engine ratings are 1100 1600 rpm for low speed
t|urbocharger operation and
1400 - 1800 rpm for high
speed turbocharger operation.

VSG

L36

H24

F18

F11