TRACTOR HP

[lilyperch]

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.

 

[Jerry/MT]

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.

 

[lilyperch]

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.

 

[wmonroe]

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.

 

[jeff9366]

Installed cooling capacity (water pumps, radiators, etc.) vary between tractors using engines with identical displacement.

 

[Jerry/MT]

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.

 

[jenkinsph]

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.

 

[Rocky Hoffler]

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

 

[Sportsman762]

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.

 

[wmonroe]

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.

 

[Gary Fowler]

Lots of tractors in fact most have a series of 3 or more that will use the same frame, engine and transmission to produce differing amounts of HP. For instance my LS P7010 (70HP) uses the same engine as the P7020 (80 HP) & P7030 (90 HP) (2010 models). The difference in engines is 7010 has no turbo, 7020 adds an intercooler to get 10 more HP and then the 7030 adds a turbo with the intercooler to get another 10 HP. Gears, frame, radiator etc are all the same. Most tractors that use the same engine could be boosted to produce more HP without any problems as long as it was done correctly. You shouldn't just start turning up the injection pump to put more fuel to the engine as you could end up blowing up the engine which would be a very expensive mistake.

 

[TNGP]

So, how would one generally do this? Increase fuel flow in very minor increments while monitoring EGT until nearing the max temps for said tractor? How is the max temp ascertained?

I would by willing to try this in my 21hp B7500, but I'm not sure if its worth the risk yet. I would sure love a few more PTO hp for a tiller and other implements....

 

[4570Man]

So, how would one generally do this? Increase fuel flow in very minor increments while monitoring EGT until nearing the max temps for said tractor? How is the max temp ascertained? I would by willing to try this in my 21hp B7500, but I'm not sure if its worth the risk yet. I would sure love a few more PTO hp for a tiller and other implements....

Does the B7500 have a water pump or is it thermosiphon? My B7200 is thermosiphon, and I would be afraid of over heating with any more HP. Since it doesn't have a thermostat I'm already afraid of it over heating and I do a pretty good job of keeping the radiator clean.

 

[TNGP]

It looks like a regular water pump. But, I imagine a higher performance fan/radiator would solve that part of heat issue should it arise. Ive toyed with the idea of adding a high performance electric primary fan or two fans on either side of the engine cowling to remove the ambient heat quickly.