Engine Horse Power not as advertised

[BillyTee]

We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?

 

[Flintknapper]

Well....with ZERO other information (testing and how it was done) we are left completely in the dark.

 

[GreensvilleJay]

so 3 year old tractor, probably has 3,000 hrs on it, never maintained, lousy fuel , plugged filters ??

 

[Yooper]

Flintnapper pretty much sums it up. How was the hp measured? PTO, crankshaft, at the drawbar? What kind of dynamometer was used for measuring? Were the numbers calculated for temperature and atmospheric pressure? How many hours on the engine?

 

[TheOldHokie]

We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?

Your profile lists an M6000 - is that the tractor? I can't find any Kubota with that model number. Is it perhaps an MX6000? If so Kubota claims 60 net engine HP and 52 PTO HP.

Kubota quotes both gross and net flywheel HP for their engines. What are you measuring and how?

Dan

 

[WI_Hedgehog]

Tests--with as "s" as in more than one test? What tests?

 

[GeoHorn]

Tests--with as "s" as in more than one test? What tests?

If a Quiz’s are Quizzical…. What are Tests?

 

[Flintknapper]

If a Quiz’s are Quizzical…. What are Tests?

Gonadical......?

 

[The Evil Twin]

Following

 

[D2Cat]

We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?

"Remember the quality of your question directly affects the quality of your answer."

 

[lynnmor]

Here is a video about recent developments in horsepower variation. While it may not exactly pertain to the OP's question it will give some information about the nonsense that is going on.

 

[Bmyers]

 

[North Idaho Wolfman]

We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?

Nowhere near enough information to even help you out!

 

[The Evil Twin]

One and done ghost member

 

[McMXi]

One and done ghost member

Good! Probably one of the dumbest first posts I've ever read, and there are a lot on here.

 

[BBFarmer]

Dang it Billy! Now look at what ya done did...... we got no dagnabit info

Reckon the feller done got lost out yonder ways!! LOL

 

[armylifer]

He spent 11 minutes on the forum and then disappeared. I hope that he comes back with more information. Maybe he got sidetracked.

 

[RBsingl]

I suspect his computer power supply was not as advertised so he is unable to develop sufficient power to make another post

For a fun look at horsepower, take a look from the late 1960s into the earliest years of the 1970s when SAE starting rating HP using the engine installed in the vehicle with all standard driven accessory items, exhaust system, etc. instead of the gross HP which was the bare engine on a stand. Some manufacturers advertised dual ratings for a couple of years and car/truck engines with a gross HP in the 300+ range were making only slightly over 200 HP in operational form. For example the hottest engine in a 1971 Corvette was a 454 rated at 425 HP however the SAE net rating was 325 HP while the base 350 CID engine was 270 gross/210 net.

The electronics industry was even worse with the low end manufacturers rating their audio gear using the IPP (instantaneous peak power) method. Basically output was measured with a scope with the preamp gain set to max and a transient event was created (typically dropping the tonearm on a record). The scope captured the peak which sometimes was the last sound that particular unit ever made. It wildly overstated the practical audio output capability which was often around 1/10th of IPP power.

Rodger

 

[BillyTee]

We are finding out that the advertised horse power is not correct.
We were expecting 70 advertised horsepower from a 2022 tractor,
but tests show it only produces 46 horsepower.
Is this correct?
Advertised vs Actual?

So….lets see if I can do a better job…..on my question!
checking used Kubotas both equipped AC cabs.
2019 M4-071Delux has a PTO HP advertised and operater manual documented at 60.
535hours on this tract dashboard.
2021 M6000-HST has a PTO HP documented at 51.8.
237hours on dashboard.
Apparently when the M4-071 was tested using a water dyno tester at the PTO shaft it only produced 46HP at maximum rpm.
So….what is the true PTO horsepower???
Is it worth while to do a dyno test before a used tractor purchase?
Hopefully I asked my question correctly.

 

[PoTreeBoy]

So….lets see if I can do a better job…..on my question!
checking used Kubotas both equipped AC cabs.
2019 M4-071Delux has a PTO HP advertised and operater manual documented at 60.
535hours on this tract dashboard.
2021 M6000-HST has a PTO HP documented at 51.8.
237hours on dashboard.
Apparently when the M4-071 was tested using a water dyno tester at the PTO shaft it only produced 46HP at maximum rpm.
So….what is the true PTO horsepower???
Is it worth while to do a dyno test before a used tractor purchase?
Hopefully I asked my question correctly.

At 500 hrs you'd expect it to be just broke in, wouldn't you? How does it run? Could be something as simple as a dirty air filter.

* What was the condition of the dyno? Was it calibrated and properly operated?
* What altitude and ambient temperature were the tests run at?
* Was the tractor properly warmed before the test?