29 pto hp from a BX
- Thread starter Sidekick
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GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
Not until it explodes
. I see people putting turbos on l2501s without a problem and that's a lighter drive train then the 35s and 40s.
He does take his time getting to the primary subject. He's apparently one of those folks who you ask what time is it, and he tells how to build a watch!
If you need more horse power in a BX then it is time to upgrade to a larger tractor.
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
I couldn't really understand him ( sub titles would have been nice...)
so numbers... new HP/OLD HP * engine HP = new engine HP...
29/17.7 x 23 = 37 Engine HP ??
Ain't no way a BX23 is going to pull my 3F plow, 5' rear blade, let alone the single shank subsoiler or the 5' rototiller
so I'm curious..
really WHAT is the point ?
so numbers... new HP/OLD HP * engine HP = new engine HP...
29/17.7 x 23 = 37 Engine HP ??
Ain't no way a BX23 is going to pull my 3F plow, 5' rear blade, let alone the single shank subsoiler or the 5' rototiller
so I'm curious..
really WHAT is the point ?
It wouldn't raise the transaxle pressure on the machine at the same rpm so I wouldn't worry. The pto shaft may be in trouble though.
GreensvilleJay
Well-known member
Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
so, nuther question...
WHAT implement needs 29HP that can FIT onto a BX23xx ??
WHAT implement needs 29HP that can FIT onto a BX23xx ??
McMXi
Well-known member
Lifetime Member
Equipment
***Current*** M6060HDC, MX6000HSTC & GL7000 ***Sold*** MX6000HST & BX25DLB
When I owned a BX25 I could have used more hp, a lot more hp! I'm only at 3,200 ft elevation but my property is hilly so hp matters. The mid PTO ran the 50" snow blower and 54" mid mount mower just fine, but overall I found the little BX25 to be lacking in many areas.
NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
I’m probably going to out myself as being ignorant with this question but if so, it wouldn’t be the first time.
I understand increasing engine HP increases PTO HP and increases HP to the wheels on a gear drive. That’s not the question.
On a HST the engine is a driving a hydraulic pump that feeds a hydraulic motor that drives a series of gears and shafts that turn the wheels. So on a HST increasing engine HP doesn’t seem like it would result in a commensurate increase in HP to the wheels unless you also changed the hydraulic pump and/or hydraulic motor.
So, for example, you turbo a naturally aspirated engine on an HST tractor and increase HP not just a small amount, but say 25 PTO HP to 40 PTO HP. You can get access that full 40 HP on the PTO (assuming it doesn’t twist some part of the driveline in two) but how much, if any, of that extra 15 HP are you going to actually get to the wheels if you’re running the stock hydrostatic transmission (variable displacement hydraulic motor) which is being fed by the stock hydraulic pump?
I understand increasing engine HP increases PTO HP and increases HP to the wheels on a gear drive. That’s not the question.
On a HST the engine is a driving a hydraulic pump that feeds a hydraulic motor that drives a series of gears and shafts that turn the wheels. So on a HST increasing engine HP doesn’t seem like it would result in a commensurate increase in HP to the wheels unless you also changed the hydraulic pump and/or hydraulic motor.
So, for example, you turbo a naturally aspirated engine on an HST tractor and increase HP not just a small amount, but say 25 PTO HP to 40 PTO HP. You can get access that full 40 HP on the PTO (assuming it doesn’t twist some part of the driveline in two) but how much, if any, of that extra 15 HP are you going to actually get to the wheels if you’re running the stock hydrostatic transmission (variable displacement hydraulic motor) which is being fed by the stock hydraulic pump?
Correct. You basically just run the new power up to the factory HST relief limits. On the L2501, for example, those relief limits can’t be met at the factory HP level. The tractor stalls before it gets there. But, with the Turbo, you can reach them easily in Medium and High gear. Luckily, it’s a nice improvement and can be easily felt and appreciated.
The L2501’s factory HST limits are just a hair lower than the L3901. So, essentially, the Turbo L2501 HST making 45HP is able to put roughly 38HP to work.
PTO HP is PTO HP and the improvement the Turbo provides is amazing.
Mike
Last edited:
NCL4701
Well-known member
Equipment
L4701, T2290, WC68, grapple, BB1572, Farmi W50R, Howes 500, 16kW IMD gen, WG24
Thanks for a thoughtful and informative response.
That makes a lot of sense. So for the 2501 you can get most of the HP increase through the HST. However, it sounds like how much of any HP increase on a HST machine can be applied all the way to the dirt could vary quite a bit depending on the specifics of the model involved.
Rather than it being like a car where the only application is acceleration, tractors have to power the steering, hydraulic functions like lifting "stuff," implement PTO, and drive wheels. If that combined requires more power than the engine puts out all systems "get shorted." Adding a turbo adds power IF it's needed to make up for a shortfall, bringing the system back up to "normal."
So in my case hauling a FEL and chipper into the woods, then chipping OR carrying a log out isn't going to strain the engine excessively so there's no tangible gain from a turbo because I'm only doing one strenuous thing at a time.
Using a large snowblower in deep, heavy snow is where a turbo might make sense as the PTO needs power for cut/shuffle/blow, wheels for strenuous pushing, and hydraulics for adjustments that are working against heavy forces, where the sum total is likely more than the engine has on tap.