INDUSTRY CONNECTIONS
SCHOOL BUS ENGINES FOR 2013 Te following engine specifications for large and small school buses were
provided by manufacturers late last year for use in the 2013 Buyer’s Guide. Due to space constraints, we are providing them to readers in this month’s edition.
SCHOOL BUS ENGINE SPECS
£ ISB6.7
CUMMINS INC. ENGINE TYPE
Fuel Type Aspiration
Displacement
Compression Ratio Bore and Stroke Dry Weight
£ ISL G
£ ISL9
ISB6.7 Diesel
Turbocharged and Air Cooled 409 CID 17.3:1
107 x 124mm 1,150 lbs.
ISL9 Diesel
Turbocharged and Air Cooled 543 CID 16.6:1
114 x 145mm 1,697 lbs.
ISL G CNG or LNG
Turbocharged and Air Cooled 543 CID 12.0:1
114 x 145mm 1,625 lbs.
FORD MOTOR COMPANY ENGINE TYPE
Fuel Type
Horsepower Displacement
Compression Ratio Bore and Stroke Torque
£ 6.8L Triton V10
ROUSH CLEAN TECH ENGINE TYPE Fuel Type
6.8L V10 Propane autogas Aspiration Displacement
Compression Ratio Bore & Stroke Dry Weight Horsepower Torque
naturally aspirated 6.8L V10 6.8L 9.2:1
3.55 inches x 4.16 inches 620 pounds 362 HP
457 ft.-lb. 38 School Transportation News March 2013 £ 6.8L V10 Gasoline
225@4500 rpm 330 CID 9.06:1
3.55 x 4.16 inches 350 lb.-ft.@2500 rpm
5.4L TRITON 16-VALVE FLEX FUEL V8
6.8L TRITON 20-VALVE V10
Gasoline
305@4250 rpm 415 CID 9.06:1
3.55 x 4.16 inches 420 lb.-ft.@ 3250 rpm
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