Why are tractors so under-powered?

   / Why are tractors so under-powered? #111  
Not sure if it was mentioned, but it would be pretty hard to take advantage on any big HP bumps for hydraulic use. I would imagine that it'd require significantly bigger pumps (and space, pump and fluid reservoir). And with bigger pumps you'd then end up needing bigger cylinders (space), which would then require significant increases in structural strength.

The OP mentioned that it would be easy to triple HP and torque via software. Perhaps, double*, but anything more than that and you'd have to have hardware modifications (larger turbos, injectors etc.). My VW ALH diesels rate 90hp and 155ft-lbs stock. Max that software alone can bump the numbers: (roughly) 110hp and 188ft-lbs. I mention these diesels because they're known to get the biggest bump, percentage-wise over stock, with just software remapping than just about anything else: they are, however, essentially de-rated- euro-spec has higher outputs. My cars got bigger bumps, which required changes in hardware (and then one car's clutch couldn't manage the added power, so more hardware change necessary for that!). My cars, however, don't see a "duty-cycle" even close to their potential power: great to have the extra power on-hand, but on the whole their job is to be miserly with fuel.

* This still depends on what the base hardware components are, whether they'd be capable of supporting the required higher fueling levels to support increases in HP and torque. As has been mentioned, you'd then be burning through more fuel- would that necessarily equate to doing more work?
 
   / Why are tractors so under-powered? #112  
Its not really the same as the power output, but my Dodge Challenger has an entire set of "hidden menus". One of the items that shows up if you cycle through these menus is the throttle position. Its expressed as a percentage. So foot to the floor is 100%. As I recall, 15% is what you see when holding a steady highway speed.
 
   / Why are tractors so under-powered? #113  
TP is merely a measurement of the rheostat under the pedal. It has to be varied to keep a constant power output under varying load conditions. Your cruise does this really well. It however isn't directly (linearly) related to duty cycle.
 
   / Why are tractors so under-powered? #114  
if you want to break your minds even further, high HP farm tractors have "power boost" when your in an application where the tractor can take the additional HP it will boost beyond its normal rated HP. Say your running your PTO and going up hill, it can potentially deliver more power for a period of time. Exactly how that all works out is a bit mystical.
 
   / Why are tractors so under-powered? #115  
if you want to break your minds even further, high HP farm tractors have "power boost" when your in an application where the tractor can take the additional HP it will boost beyond its normal rated HP. Say your running your PTO and going up hill, it can potentially deliver more power for a period of time. Exactly how that all works out is a bit mystical.

The big JD combines (and probably others) do it all the time. You extend the auger out to unload on the go and the computer knows to crank up the turbo and fuel pump. Somewhere around 125hp boost (500-625 or so) if I recall.
 
   / Why are tractors so under-powered? #117  
It's called the EPA, No fun for you!!!!
 
   / Why are tractors so under-powered? #118  
   / Why are tractors so under-powered? #119  
I cant believe this topic is still getting comments.
 
   / Why are tractors so under-powered? #120  
One should consider longevity too. Tractor engines are not stressed at all (assuming the operator isn't an idiot). You'll find decades old diesels still running and have never been overhauled.

Kind of like the first 5.9 12 valve cummins in the early dodge trucks..You could wear out three or four pickups with the same motor.

They didn't make much power but they would run forever.
 

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