Two Things about Diesel engines...

[diyDave]

If that 5' bush hog is too much for your tractor, why not just chop a couple of inches off of each blade!

 

[john_bud]

This post is interesting to me because it seems the Kubota B7610 (rated at 24 hp) and the B2630 (rated at 26 hp) share the exact same engine. Since I own a B7610 I always wondered if there was a simple change that could be made to get the B7610 to 26 hp. Not for pulling or traction, just for pto.

Does anyone know how Kubota does this safely?

Dave

In general by recalibrating the fuel pump and or using larger / more holes in the injectors. Can also change the pop-off pressure.

Call local fuel injection service guys. They can probably do it -- but at a cost.

The MFG just sets them all up the same way for more power from the get go. Having it set that way later, is a bigger deal. But, you may be lucky and the pump may have a screw to turn to increase fuel delivery - some designs do.

jb

 

[Dascro]

Thanks John_bud,

I thought it might have something to do with the injector pump, but wasn't sure. Since that is such an expensive piece of hardware, if its not something that be changed easily (and that be returned to factory conditions easily tool!) I doubt I'll try anything with it.

Thanks,
Dave

 

[psj12]

In most cases a high pressure injection pump can be easily adjusted to provide more fuel. This may or may not result in more power depending on the engine manufacturer. Many makers slightly reduce max fuel to extend the longevity of their engines, meet EPA requirements, or to make a higher horsepower engine function in a lighter framed tractor.
You need to find the rack adjustment screw on your pump and turn it no more than 1/4 turn towards more fuel. Start the tractor and accelerate hard in a higher gear and look for smoke. If it does not smoke excessivly you can continue in 1/4 turn increments until it produces a puff of smoke (not too dark or black) when first accellerating. You can leave this setting or reduce it back 1/4 turn. This should be your highest fuel/power setting. This works only with mechanically injected engines with high pressure pumps. The rack adjustment on different type pumps are located in different places and may turn different directions to adjust.

 

[firefighter9208]

Bullydog performance makes a module that gives you 30% more power if you have an 8000, 8010, or 8020 John Doore. They also have a module that works on the Valtra T120-T190, New Holland TM175 and 190, CASE MXM 175 and 190 and Massey Ferguson 6400 Series. Plug and play. Bully Dog is the world leader in diesel performance parts, for Ford, Dodge and GM trucks.

Chris

 

[patrick_g]

In most cases a high pressure injection pump can be easily adjusted to provide more fuel. This may or may not result in more power depending on the engine manufacturer.

Very well said indeed. Your procedure will get close to the max (reasonable) power since the more fuel you burn the more power you can develop. (Just adding more fuel doesn't guarantee it will be burned efficiently or at all in some instances) There is a diminishing returns sort of thing where each added increment of fuel produces less additional power than the one before it until finally you go so far that you reduce power output. You will have already begun to smoke like crazy and economy has plummeted and internal temps have skyrocketed before you get very far into the loss of power part of the curve.

It is a good idea to install a pyro if you are going to try to develop more power than the MFG sets up your engine for.

Lets toss in a word about heat and overheating. Did I mention HEATING/OVERHEATING. You can melt engine parts by overfueling and without a pyro you wouldn't know till it was way past too late. Just looking at a water temp gauge or idiot light will not give you a clue.

I wouldn't recommend anything at all all like this for a tractor in warranty as it will sure invalidate it. In general if you can afford the risk of burning up a new tractor making engine performance mods you could afford a more powerful tractor in the first place.

At least use a properly installed pyro so you have a clue how much extra heating you are causing.

Happy hot rodding,

Pat

 

[hbaird]

I tried the, adjust the rack for a little smoke suggestion, on my Jinma, and got a lot more power. I suspect it was detuned when I got it new. I used the New Jersey State D.O.T. guidline for the final adjustment. The haze from the exhaust is worst case a 30% reduction in the light viewed against a clear sky. W.A.G. on the 30% reduction. You can see it only against the clear sky. I can't see any smoke or haze now with woods for a background.
Harold

 

[patrick_g]

Harold, I hope anyone enforcing that standard has "chips" or transparencies against which to compare. Otherwise the results will be so subjective as to just be an opinion with little or no repeatability from enforcement official to official.

Pat

 

[MJPetersen]

One the ATS turbo kits for the 6.9 and 7.3 liter ford pickups they supplied a piece of smoked pexiglass that you viewed the exhaust through. When it started to be seen through the glass then you had gone a bit to far. Back it up a tiny bit and you were there.

Mike

 

[Paddy]

psj12,

What kind of tractor to you have? A KAMA? Is the rack screw the one with a sealed wire?

Patrick T.