GE Energy Gas Engines Waukesha Knock Index (WKI)

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Waukesha Knock Index

Power and Timing Curves VGF Models

EN: 143949

DATE: 6/10

Ref. S

7079-19

Waukesha Knock Index Power and Timing Curves VGF GSI/GSID 130°F (54°C) Intercooler Water, 180°F (82°C) Jacket Water

0.35% CO Exhaust (16:1 AFR)

NOTES: 1. A computer program to calculate WKI and SLHV is available from GE Energy Sales Application Engineering. 2. An on-site detonation sweep must be performed at the highest operating temperatures and at rated load to verify a minimum

knock margin of 6°. Timing to be retarded as necessary. 3. Site condition derates apply as follows: (Ref. S-8154-6)

Ambient Air Temp. 1% per 10°F (5.5°C) above 100°F (38°C) Altitude 2% per 1000 ft (305 m) above 1500 ft (450 m) for > 38 WKI

2% per 1000 ft (305 m) above 5000 ft (1525 m) for ≤ 38 WKI Jacket Water Temp. 2.5% per 10°F (5.5°C) above 180°F (82°C), up to 210°F (99°C) Max, for < 65 WKI

4. Ratings apply for fuels above 650 BTU/SCF (25.55 MJ/m3) SLHV. 5. For fuels outside the ranges covered here contact GE Energy Sales Application Engineering. 6. Reference S-7884-7 (or latest revision) in the Fuels and Lubrication Section of the General Technical Data Manual for allowable

fuel heating value changes.

Waukesha Knock Index

TM Power and Timing Curves VGF-GSID 130°F Intercooler Water, 180°F Jacket Water

0.35% CO Exhaust (16:1 AFR)

100 105

110 115 120 125

130 135 140

145 150 155 160

165 170 175 180

30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120

Waukesha Knock IndexTM

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38

Timing

Continuous Load

Overload

4 Ground Spark plugs (i.e. 60999S) Not Applicable for

Digester Gas or Landfill Gas 400-650

BTU/ft3

Applies for 1350-1800

RPM engine speeds

J-Type Sparks Plugs 60999Z or 69919D