Engine Ratings - Chassis Cab Vs. Pick Up
#1
Engine Ratings - Chassis Cab Vs. Pick Up
According to the specs. on page seven of the Coffee table Book:
Diesel Technician Society
The engine in the chassis cab is rated
at 300 hp @ 2800 rpm and 660 ft.-lb. @ 1600
while the pick up is rated
at 390 hp @ 2,800 rpm and 735 ft.-lb. @ 1,600 rpm
Please pardon my ignorance, but what is different about the engines which produces the different ratings? I dare say it's in the software, but what is it that the software does?
Diesel Technician Society
The engine in the chassis cab is rated
at 300 hp @ 2800 rpm and 660 ft.-lb. @ 1600
while the pick up is rated
at 390 hp @ 2,800 rpm and 735 ft.-lb. @ 1,600 rpm
Please pardon my ignorance, but what is different about the engines which produces the different ratings? I dare say it's in the software, but what is it that the software does?
#2
According to the specs. on page seven of the Coffee table Book:
Diesel Technician Society
The engine in the chassis cab is rated
at 300 hp @ 2800 rpm and 660 ft.-lb. @ 1600
while the pick up is rated
at 390 hp @ 2,800 rpm and 735 ft.-lb. @ 1,600 rpm
Please pardon my ignorance, but what is different about the engines which produces the different ratings? I dare say it's in the software, but what is it that the software does?
Diesel Technician Society
The engine in the chassis cab is rated
at 300 hp @ 2800 rpm and 660 ft.-lb. @ 1600
while the pick up is rated
at 390 hp @ 2,800 rpm and 735 ft.-lb. @ 1,600 rpm
Please pardon my ignorance, but what is different about the engines which produces the different ratings? I dare say it's in the software, but what is it that the software does?
#3
Another concern in addition to emissions is duty cycle. Chassis cab truck is expected to work at a higher load at a given percentage of time. Or spend a higher percentage of time above a given load level.
The 400hp and 800 lb-ft in a pickup is not sustainable for a long period. The engine components won't hold up and the cooling system can only hold that level of power for so long.
Duty cycle is why you see lower specific power outputs in higher duty cycle applications. 400 hp from 6.7 liters is great but only in small doses. A modern 400hp truck engine is around 9 or 10 liters at typically 1800 or 2100 rpm. Before electronic controls 400hp would probably be 14 liters (in a 4 stroke). But this 10 liter truck engine can sustain a higher percentage of it's rated power for a longer period of time. It also has a much larger radiator to support this duty cycle.
The 400hp and 800 lb-ft in a pickup is not sustainable for a long period. The engine components won't hold up and the cooling system can only hold that level of power for so long.
Duty cycle is why you see lower specific power outputs in higher duty cycle applications. 400 hp from 6.7 liters is great but only in small doses. A modern 400hp truck engine is around 9 or 10 liters at typically 1800 or 2100 rpm. Before electronic controls 400hp would probably be 14 liters (in a 4 stroke). But this 10 liter truck engine can sustain a higher percentage of it's rated power for a longer period of time. It also has a much larger radiator to support this duty cycle.
#5
According to the specs. on page seven of the Coffee table Book:
Diesel Technician Society
The engine in the chassis cab is rated
at 300 hp @ 2800 rpm and 660 ft.-lb. @ 1600
while the pick up is rated
at 390 hp @ 2,800 rpm and 735 ft.-lb. @ 1,600 rpm
Please pardon my ignorance, but what is different about the engines which produces the different ratings? I dare say it's in the software, but what is it that the software does?
Diesel Technician Society
The engine in the chassis cab is rated
at 300 hp @ 2800 rpm and 660 ft.-lb. @ 1600
while the pick up is rated
at 390 hp @ 2,800 rpm and 735 ft.-lb. @ 1,600 rpm
Please pardon my ignorance, but what is different about the engines which produces the different ratings? I dare say it's in the software, but what is it that the software does?
#7
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#8
If you look at the Coffee Table Book it shows the two different turbos used. The one on the bottom of page 38 is the pickup turbo and the one on the top of page 39 is the chassis turbo...
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jschira
Flatbed, Car, Boat, Utility, Horse & Misc. Trailer Towing
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11-26-2006 07:38 PM