Is 50 HP really 50 HP?

[npalen]

Probably has been discussed here previously but wondering about the honesty of horsepower on new tractors. New models of agricultural tractors are normally run through the Nebraska Test to verify the advertised horsepower and pulling power. Is there anything like this for compact tractors?
Perhaps the new tractors have Volkswagen software that ups the fuel for the Nebraska Test?

 

[davesl708]

Normally competition keeps hp pretty honest. Competitors buy and test each other's products to find out how to compete.
The comp would love to find the other has over stated their hp.

 

[CobyRupert]

I thought that in many cases the horsepower that is advertised is the best case that's measured on an engine without stock intake, exhaust, pollution controls, etc... (Is the engine even in the tractor?) The more accurate measurement is probably the horsepower measured at the PTO.

 

[davesl708]

Horse Power is measured on a dynomonitor test stand. There is an industry standard for the test.

 

[4570Man]

Make sure you are comparing gross hp to gross hp and net hp to net hp, not gross hp to net hp. Also the rated rpm is important. A 50 hp gas motor rated at 6500 rpm and a diesel rated at 1800 rpm are not equal,

 

[Utopia Texas]

Make sure you are comparing gross hp to gross hp and net hp to net hp, not gross hp to net hp. Also the rated rpm is important. A 50 hp gas motor rated at 6500 rpm and a diesel rated at 1800 rpm are not equal,

Too bad none of my gasoline tractors run at 6500 RPM....

 

[kenmac]

HP may not be true HP.. This is most likely why you won't find small engines rated in HP anymore.. They are rated in CC's

 

[buickanddeere]

Probably has been discussed here previously but wondering about the honesty of horsepower on new tractors. New models of agricultural tractors are normally run through the Nebraska Test to verify the advertised horsepower and pulling power. Is there anything like this for compact tractors?
Perhaps the new tractors have Volkswagen software that ups the fuel for the Nebraska Test?

HP is HP . Where persons are confussed is during overload conditions which will lug the "prime mover". prime movers have anywhere from zero to 300% torque rise . Comparison between a steam turbine and a reciprocating steam engine comes to mind here as an example .

 

[Sawyer Rob]

I NEVER look at engine HP, it's PTO HP that I care about. That's the number that gives you a better idea of what the tractor will do...

That is, "IF" you want to use the tractor for a tractor and not a glorified lawn mower... lol

SR

 

[davesl708]

I NEVER look at engine HP, it's PTO HP that I care about. That's the number that gives you a better idea of what the tractor will do...

That is, "IF" you want to use the tractor for a tractor and not a glorified lawn mower... lol

SR

Yes. You can have 100 hp at the engine but if only 10 are getting to the wheels that is not useful information.
Output at the wheels or implement are what gets the work done.