Increasing fuel at the injector pump

[zoomy]

Has anybody increased their horsepower by increasing the amount of fuel delivered by the injector pump by adjusting the fuel bypass valve?
Just saw a video made by the guys at Everything Attachments and was amazed that they increased the PTO horsepower from 76 hp to 107 hp by turning the screw 1.5 turns. Would like to do this on my L5740. When using my 72 inch brush mower it starts to bog down when going thru 3 foot tall grass even when traveling at 3mph.
Not looking to max out the power but I could use 10-15 more ponies.

 

[North Idaho Wolfman]

Knowing Kubota's as well as I do I find it real hard to believe that you could get such a large increase in HP just by adjusting a valve.
I'll look up the Video as see what I can find out.

 

[kuboman]

Send the link to that video.
Thanks

 

[Billdog350]

With a turbo motor I could see that working. With an NA motor...not sure if increasing fuel will = hp...at some point you're causing an inefficient burn....

 

[nickelplated5s]

Don't run a full 72" inch pass or don't let it get to three feet.

 

[Daren Todd]

I was always under the impression that when increasing fuel, then you need to back the timing off slightly to compensate. I would love to see the video of what they did on what machine

 

[North Idaho Wolfman]

Just as I suspected the video is it not a KUBOTA, it's a New Holland and a completely different motor and injection system.
You can not just lump all the tractors into a pile, and think all the adjustments and rules are the same for all.

Video: https://www.youtube.com/watch?v=MGWSIFyvdRw

 

[ShaunRH]

My L3200 is barely at the limit of it's cooling capability as it is, I would not want to try to get any more power out of the motor without adding auxiliary coolers for both coolant and oil.
These are about as efficient of units out of the factory as they can possibly be, that's a hallmark of Kubota. In some ways, it can be a problem like with the lack of cooling overhead on these 3000 series units.
I would never monkey with these settings. If you need more HP, get a larger tractor and sell the smaller one. They hold their value so well, you would only be out a few thousand.

 

[Tooljunkie]

I wouldnt go twisting in things in hopes of a horsepower gain,my luck would be something would fall apart inside and engine would 'splode.
I saw something on somewhere to crank up the fuel-made more smoke. Great, i thought. More soot in my face....

 

[zoomy]

I kind of suspected it was too good to be true. The video makes it seem this is a common practice to up power output.

 

[Daren Todd]

I would have some serious reservations by just turning up the fuel. Usually to do it correctly, the timing would need to be backed off slightly as well to compensate for the extra fuel. You see them do it quite often in the hot rod shows when they change to a bigger fuel injectors and start adding turbo's. Usually when I have some yahoo mess with my injection pumps at work, they create more problems then what it's worth. I just had two deutz shipped in from another location that I immediately sent to the dealer for Injection pump work. They just fired the guy at that location who was "turning" up the fuel. Ones over fueling and dumping diesel into the oil. The other has three out of the four ports on top of the IP stripped out and free flowing fuel. Guy also tried to retard the timing on the IP and dropped the gear when he pulled the timing cover. Guy did about 5k worth of damage between the two motors. Thats not counting the 2k it cost for a new cylinder and head on another unit he "turned" the fuel up on