kubota vs. kioti

[SPYDERLK]

With a open diff you only have one wheel pulling or very close to all the power is going to one tire. .

That is not right. = force is delivered by each wheel.

 

[SPYDERLK]

I think technique is the issue there. On VERY hard surfaces, I'd rate the traction equal between R4's and R1's. But pulling in reverse? And on a very hard surface, yea, the R4's may have a slight edge. But I certainly wouldnt go as far to say the kubota wouldnt budge them, and the CK did it with ease. >>But I have to ask, why did it take 8 pages and several days to simply answer the question of how you were hooked to the log and what the surface condition was?.<<

Technique is a definite issue. But when it finally came out that he was working on shale it explained a lot. Hard surfaces and sand/gravel [non unified] surfaces is where the R4 slicks can beat the R1 by enuf to make a difference. >>... Because OP copped an attitude.
larry.

 

[Bluegill2]

That is not right. = force is delivered by each wheel.

Yes, but if one wheel loses traction the other will not pull.

 

[GManBart]

And engine torque is of less importance (IMO) than engine HP. Quite simply, HP is HP. IT wont change. But you can achieve whatever torque you want with gearing.

This statement is completely wrong on many levels.

For pulling heavy objects, engine torque is far more important than HP. Engine torque can't be changed by gearing. The torque delivered to the wheels will vary with gearing, but it is only variable within the range the engine can produce. The last Mack truck I drove had an E7 engine with 250hp, but it had just shy of 1,000lb/ft of torque. My Tundra has over 380hp, a bit over 409lb/ft of torque. Which do you think will pull heavy objects better? It ain't the Tundra with 50% more HP.

Further, torque curves change far less (flatter) than HP curves are, so gearing has much less impact on torque than it does HP.

 

[SPYDERLK]

Yes, but if one wheel loses traction the other will not pull.

you have twice the pull of the wheel with the least traction.

 

[SPYDERLK]

This statement is completely wrong on many levels.

For pulling heavy objects, engine torque is far more important than HP. Engine torque can't be changed by gearing. The torque delivered to the wheels will vary with gearing, but it is only variable within the range the engine can produce. The last Mack truck I drove had an E7 engine with 250hp, but it had just shy of 1,000lb/ft of torque. My Tundra has over 380hp, a bit over 409lb/ft of torque. Which do you think will pull heavy objects better? It ain't the Tundra with 50% more HP.

Further, torque curves change far less (flatter) than HP curves are, so gearing has much less impact on torque than it does HP.

So it was not wrong on any level. One only needs to stipulate a flat torque characteristic so the HP can be used moreeasily. Its the Tundra geared 2:1.

 

[tractortom55]

You have same traction to both tires until one spins and then the one not spinning has more traction and the one that is spinning has less. That is why the have diff lock.

 

[SPYDERLK]

yes :confused3:

 

[LD1]

This statement is completely wrong on many levels.

For pulling heavy objects, engine torque is far more important than HP. Engine torque can't be changed by gearing. The torque delivered to the wheels will vary with gearing, but it is only variable within the range the engine can produce. The last Mack truck I drove had an E7 engine with 250hp, but it had just shy of 1,000lb/ft of torque. My Tundra has over 380hp, a bit over 409lb/ft of torque. Which do you think will pull heavy objects better? It ain't the Tundra with 50% more HP.

Further, torque curves change far less (flatter) than HP curves are, so gearing has much less impact on torque than it does HP.

The tundra has the ability to pull heavy objects better. Cause the tundra can be geared to give the exact same torque to the wheels. And have almost double the HP to help crest steep hills at more than a crawl.

No matter how you gear it, the mack aint gonna have any more power.

Horsepower is the amount of work that CAN be done over a given period of time. The tundra is capable of MORE work in a given time. OR it can do the same work as the mack only quicker.

Torque at the engine is irrelevant. Cause it can be changed with gearing to suit whatever needed torque you require.

 

[LD1]

Let me phrase it this way:

For pulling heavy loads, (or any load for that matter), engine torque dont mean squat. Final drive torque is what matters. And that is easily changed (by design) with gearing.

My little 100hp saturn has a bigger motor and higher torque rating than my kubota. So why does my kubota do better towing a heavy load???

Answer: Gearing has made it so the kubota has more torque to the wheels.