AntrimMan
Gold Member
No, not really. In order for the smaller stroke engine to have the same displacement there needs to be more pistons or larger bores. Either one means more power put to the crank.
Martin
Martin
HP and Engine Displacement
- Thread starter Ronster
- Start date
- Views: 7338
AntrimMan
Gold Member
Yes, I get it. If the manufacturer was to show HP vs RPM curves one could easily calculate the available torque for any given RPM. Thats why I would like to see the curves and not just a maximum statement. I did check the engine website posted above and sadly mine was not listed.
I feel that my machine doesn't provide any noticeable difference in performance over 2300 RPM while the max HP is stated at 2700. So, they can tout HP all they want, after 2300 it is just more revs. Am I crazy? The curves will tell. Not that any of this is meaningful. The machine has all I need at the moment.
Martin
I feel that my machine doesn't provide any noticeable difference in performance over 2300 RPM while the max HP is stated at 2700. So, they can tout HP all they want, after 2300 it is just more revs. Am I crazy? The curves will tell. Not that any of this is meaningful. The machine has all I need at the moment.
Martin
JoeL4330
Platinum Member
I believe you will find that the engine RPM setting to achieve correct PTO speed (540 rpm) is (deliberately) a few hundred RPMs past the torque peak. Then, if the PTO attachment bogs down the engine slightly (for a moment or two), the engine actually increases its torque output, so it can ride through such little glitches without really bogging down. In a sense, it has a little "reserve" power.
odleefs
Gold Member
- Joined
- Jun 18, 2005
- Messages
- 302
- Location
- Northeastern PA
- Tractor
- 2005 Bobcat/Toolcat 5600T C, 2000 Yamaha Grizzly
AntrimMan,
You are sane. (At least reganding your post in TBN! /forums/images/graemlins/grin.gif)As stated earlier and more evidently visualized by looking at any of the engine curves listed in www.KUBOTAENGINE.COM, you may notice that after a given point, as RPMs increase, torque decreases and brake HP flattens...this is why you don't appreciate a significant increase in umph! after 2300 RPM for your tractor. Note even more importantly in this era of inflated fuel that at higher RPMs, consumption of fuel goes way up for little, if any, HP gain. /forums/images/graemlins/shocked.gif
You are sane. (At least reganding your post in TBN! /forums/images/graemlins/grin.gif)As stated earlier and more evidently visualized by looking at any of the engine curves listed in www.KUBOTAENGINE.COM, you may notice that after a given point, as RPMs increase, torque decreases and brake HP flattens...this is why you don't appreciate a significant increase in umph! after 2300 RPM for your tractor. Note even more importantly in this era of inflated fuel that at higher RPMs, consumption of fuel goes way up for little, if any, HP gain. /forums/images/graemlins/shocked.gif