The Case IH STX430QT Quadtrac tractor engine horsepower is 430 hp | 320.7 kW, and PTO horsepower is 375 hp | 279.6 kW.
Engine HP430 hp | 320.7 kW
PTO HP375 hp | 279.6 kW
PTO Transfer87.2%
Displacement786 ci | 12.9 L
Case IH STX430QT Quadtrac Horsepower Specs
Engine horsepower
430 hp | 320.7 kW
PTO horsepower claimed
375 hp | 279.6 kW
Case IH STX430QT Quadtrac Useful Horsepower Calculations
PTO-to-engine power transfer
87.2% of engine hp reaches the PTO
Engine size per PTO horsepower
2.1 ci per PTO hp
PTO horsepower per liter
29.1 PTO hp per L
Engine size per engine horsepower
1.8 ci per engine hp
Engine horsepower per liter
33.3 engine hp per L
Rated speed per PTO horsepower
5.3 rpm per PTO hp
Case IH STX430QT Quadtrac Engine Specs
Engine type
turbocharged diesel
Displacement
786 ci | 12.9 L
Bore and stroke
5.314×5.906 inches | 135 x 150 mm
Rated RPM
2000
Case IH STX430QT Quadtrac Fuel, Cooling, Starting & Service Specs
Starter volts
12
Battery volts
12
Case IH STX430QT Quadtrac Horsepower Comparison Charts
Engine horsepower comparison
This model
430 hp
Average
210 hp
Low
120 hp
High
380 hp
PTO horsepower comparison
This model
375 hp
Average
175 hp
Low
100 hp
High
320 hp
Displacement comparison
This model
786 ci
Average
520 ci
Low
360 ci
High
750 ci
Rated RPM comparison
This model
2,000 rpm
Average
2,100 rpm
Low
1,600 rpm
High
2,500 rpm
Engine size per PTO HP
This model
2.1 ci/hp
Average
3.3 ci/hp
Low
2 ci/hp
High
5.2 ci/hp
Benchmarks use practical low, average and high ranges for the large ag tractor category. Use the operator manual and actual engine/tractor configuration before sizing implements or judging working power.
Case IH STX430QT Quadtrac Horsepower FAQ
How much horsepower does the Case IH STX430QT Quadtrac have?
The listed engine output is 430 hp, above the 210 hp benchmark average. That is a higher-power result, so ballast, tire setup and implement width matter if you want to use the full 430 hp.
How much PTO horsepower does the Case IH STX430QT Quadtrac have?
The listed PTO output is 375 hp, above the 175 hp benchmark average. That is the number to use for mowers, balers, augers, pumps and other PTO tools that need up to about 375 hp.
How much engine power reaches the PTO on the Case IH STX430QT Quadtrac?
The PTO-to-engine transfer works out to 87.2%, from 430 engine hp to 375 PTO hp. That is a normal usable range for judging PTO implement fit.
How big is the Case IH STX430QT Quadtrac engine?
The engine displacement is 786 ci, above the 520 ci benchmark average. Bigger displacement can help low-rpm pull and load-holding feel.
Is the Case IH STX430QT Quadtrac engine stressed for its PTO horsepower?
The engine has about 2.1 cubic inches per PTO hp, using 786 ci and 375 PTO hp. That is a smaller-displacement, higher-output style result.
How much PTO horsepower per liter does the Case IH STX430QT Quadtrac make?
The output density is about 29.1 PTO hp per liter, using 375 PTO hp and 12.9 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
What rpm is the Case IH STX430QT Quadtrac rated at?
The rated speed is 2,000 rpm, close to the 2,100 rpm benchmark average. The 2,000 rpm figure is around normal for this class.
Official information note
Horsepower and engine specs can vary by year, market, engine option, fuel system, test standard and tractor configuration. Check the operator manual, spec plate, parts book and official caseih.com website before buying parts, sizing implements or making repair decisions.
