TRACTOR HP

   / TRACTOR HP #1  

lilyperch

Bronze Member
Joined
May 30, 2016
Messages
65
Location
Herrick, IL
Tractor
2016 Kioti NX4510 HST Cab Backhoe
Several tractor brands use same engine for a series of HP. IE Kioti NX 4510 to NX 6010. So the engine for the lower hp must have some type of air restrictor plate and changes in the ECM/EMM. Has anyone removed the restrictor plate to gain more hp like they do in racing and outboard boat motors??
May involve some tweaking with the ECM but not always.
 
   / TRACTOR HP #2  
There is no restrictor plate on a diesel engine. Power control is accomplished by controlling fuel flow. For a fixed displacement engine the power is increased with increased fuel flow until, generally, a peak temperature is achieved in the cylinder, The limit is usually the max temperature that the piston crown can withstand. The other way to increase power is to increase airflow via a compressor, a turbo compressor being the most popular way to do this. Here again as the airflow increases so does the fuel flow and hence the increased power out put.
 
   / TRACTOR HP
  • Thread Starter
#3  
Ok, so same cubic inch engine used in same tractor for different hp could be changed through the ECM/EMM. They would not used different cylinder blocks as it would not be cost effective.
Thank you, not a motor geek did not know how deisels were set up. All examples are turbo engine. Is it possible a cylinder sleeve is used? Probably not likely.
Thank you for sharing knowledge.
 
   / TRACTOR HP #4  
Many times there are other factors that support the increase in hp even though the displacement doesn't change. One example is piston cooling nozzles.
 
   / TRACTOR HP #5  
Installed cooling capacity (water pumps, radiators, etc.) vary between tractors using engines with identical displacement.
 
Last edited:
   / TRACTOR HP #6  
Ok, so same cubic inch engine used in same tractor for different hp could be changed through the ECM/EMM. They would not used different cylinder blocks as it would not be cost effective.
Thank you, not a motor geek did not know how deisels were set up. All examples are turbo engine. Is it possible a cylinder sleeve is used? Probably not likely.
Thank you for sharing knowledge.

Electronic controls systems just use different hardware/software to control fuel flow.
 
   / TRACTOR HP #7  
Ok, so same cubic inch engine used in same tractor for different hp could be changed through the ECM/EMM. They would not used different cylinder blocks as it would not be cost effective.
Thank you, not a motor geek did not know how deisels were set up. All examples are turbo engine. Is it possible a cylinder sleeve is used? Probably not likely.
Thank you for sharing knowledge.

Some use different turbo chargers between models and add aftercooling to lower the intake air temperature too. So there are a few additions that are made to get more power out of the same block and displacement engines.
 
   / TRACTOR HP #8  
A friend has a Kioti about 28 h.p. said after warranty he was getting pump turned up to give him about 35 h.p. because the engine was detuned for his tractor this was with mechanical injection pump
 
   / TRACTOR HP #9  
There are several factors in what horse power a d engine puts out. Diesels do not use air flow restrictor plates. It depends on the manufacture and the engine series on how more or less horsepower is produced by the engine. Injection pumps have different flow rates, sometimes you can tweak the flow rate to get more horse power. Often the higher horse power engines will have different injection pumps, injectors, and pistons. Often other parts such as radiators, and other internal parts (such as cooling nozzels) will be changed. The injectors and injection pumps are often matched, so adding new injectors or increasing the injection pump will not net much power gain. The pistons sometimes will differ in the same series of engine. To increase HP on a tractor the best solution is to buy a bigger unit. Messing with injection pumps, injectors and other fuel system components without having a good knowledge of what your doing can cause catastrophic results, and engine are not cheap to repair or replace. I enjoy tinkering and have even rebuilt diesel tractor engines, however the injectors and pump where always sent off to a specialty shop for inspection, and repair. The wrong injector can melt the top of a piston away.
 
   / TRACTOR HP #10  
Sportsman, good post. I'll add to what you said, "The wrong injector can melt the top of a piston away." Also the correct injector but with additional fuel, from turning up the pump, can just as easily melt a piston. Modifying hear engines can be done but more care and monitoring must be done while using them.
 

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