Adding power to a B2650
- Thread starter sardillim
- Start date
It would be good to get one documented. There are a lot of little turbos out there.
To the OP, sorry in advance for the lambasting you will get for the suggestion that you would like to modify the motor.
To the OP, sorry in advance for the lambasting you will get for the suggestion that you would like to modify the motor.
You can probably get away with a little more hp, but what was this machine designed for? How much more can the transmission handle? I have operated some 100+hp tractors that have been turned up, most I hate. Don't get me wrong, I like hp, but about the time you use the extra hp, the pyro starts climbing, followed by the water temp.
Sent from my LGMP260 using Tapatalk
Sent from my LGMP260 using Tapatalk
I'm not aware of any turnkey kits for the B2650, but that doesn't mean that it can't be done. You'll just need to do your research and perhaps a bit of fabrication to make it happen.
The B3350 comes with a turbo, so there might be some parts that can be borrowed from that application.
There are kits for the Kubota XUV's that might be a good starting point.
Example: https://www.turbokits.com/kubota/rtv_900/turbo_kits/SWAG_Kubota_RTV_Turbo_Kits/332/
Some folks like turbo charging Kubota engines for other applications.
https://www.overlanddiesel.com/turbo_charger.html
Something to consider...
The Kubota pistons used in turbo charged applications use steel top ring grooves to increase longevity. I read in another forum where someone who turboed their engine had problems years afterwards with excessive blowby and loss of compression. The top ring grooves were extremely wide and could no longer support the top ring. The normally aspirated pistons are all aluminum and the top ring groove apparently can't take it. Remedied by buying pistons for turbo applications. He bought a whole rebuild kit from an authorized Kubota engine rebuilder to repair the damaged pistons.
It could be that he had the boost turned up too much. A few psi could wake the motor up and still keep things at a safe level.
If you go this route, please post the progress and details here.
The B3350 comes with a turbo, so there might be some parts that can be borrowed from that application.
There are kits for the Kubota XUV's that might be a good starting point.
Example: https://www.turbokits.com/kubota/rtv_900/turbo_kits/SWAG_Kubota_RTV_Turbo_Kits/332/
Some folks like turbo charging Kubota engines for other applications.
https://www.overlanddiesel.com/turbo_charger.html
Something to consider...
The Kubota pistons used in turbo charged applications use steel top ring grooves to increase longevity. I read in another forum where someone who turboed their engine had problems years afterwards with excessive blowby and loss of compression. The top ring grooves were extremely wide and could no longer support the top ring. The normally aspirated pistons are all aluminum and the top ring groove apparently can't take it. Remedied by buying pistons for turbo applications. He bought a whole rebuild kit from an authorized Kubota engine rebuilder to repair the damaged pistons.
It could be that he had the boost turned up too much. A few psi could wake the motor up and still keep things at a safe level.
If you go this route, please post the progress and details here.
Agreed.
The 19.5 PTO HP B2650 uses the same transaxle as does the 27 PTO HP B3350 so the drive train is designed to handle at least the output of the B3350 engine. Kubota chose not to increase the HP of the forthcoming LX3310, which will replace the B3350, so I expect that the transaxle is at or near it's design limit now.
That said, One will be challenged to get much more HP to the ground using the B2650/B3360 chassis.
A better solution is an LX3310.
SDT
Thanks for all the input, the sized of the b2650 is perfect for me but I find the machine is under powered at times, mostly when i am running the snow blower in heavy snow, Probably going to trade it in for a B3350 or its replacement . Not thrilled about dealing with a DEF system
You might want to read the plethora of B3350 regen problem posts before going that direction. It might be wise to wait for the LX.
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That's why I ended up buying a tractor that is 4 years older than the one it replaced. It did take the best part of a year to find a nice one though.
I agree with Chim.
I searched for a 2013 and found one with 250 hrs.
I want nothing to do with T4 emissions system in low use small engines. They do not work hard enough to make the emissions systems work as well as on larger harder usage engines.
I searched for a 2013 and found one with 250 hrs.
I want nothing to do with T4 emissions system in low use small engines. They do not work hard enough to make the emissions systems work as well as on larger harder usage engines.
dirtydeed
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B2650 BH77, U27-4R2, BX23TLBM, box blade, rear blade, flail mower, Stump Grinder
I think the B2650 uses the very same engine as the former B2920. All that was done was they limit the rpms to something like 2500-2600 rpm.
Find a way to increase rpm and fuel delivery and you'll have your 30 hp.
Find a way to increase rpm and fuel delivery and you'll have your 30 hp.
According to Tractordata (admittedly, not to be trusted), the 2920 is rated 29 engine/21 PTO HP at 2,750/2,800 RPM. The 2650 is rated 25.5 engine/19.5 PTO HP at 2,500 RPM.
This suggests that one could realize an increase of about 1.5 HP by increasing the engine RPM and corresponding fuel delivery to 2,800 RPM.
Few (if any) will notice such increase, all of which is produced above rated PTO RPM, and doing so with a common rail engine is neither easy nor inexpensive.
SDT
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GreensvilleJay
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BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
re: the machine is under powered at times, mostly when i am running the snow blower in heavy snow,
I'll wager all tractors running snowblowers are 'underpowered'. Most snowblowers have 'huge' augers, designed for light,fluffy,DRY snow. NONE are designed for that wet,heavy,arrrgh 80% water 'snow'.
Last snowfall(wet,heavy), I took it snail slow to make the first path THEN was able to take 1/3 width and got rid of all of it.
You'd probably have to double or triple the HP to get it done faster.
I'll wager all tractors running snowblowers are 'underpowered'. Most snowblowers have 'huge' augers, designed for light,fluffy,DRY snow. NONE are designed for that wet,heavy,arrrgh 80% water 'snow'.
Last snowfall(wet,heavy), I took it snail slow to make the first path THEN was able to take 1/3 width and got rid of all of it.
You'd probably have to double or triple the HP to get it done faster.
North Idaho Wolfman
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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Agreed/corrected.SDT.... Ummmm your numbers are backwards.
B2920 29 Engine HP / 21 PTO HP
B2650 25.5 Engine HP/ 19.5 PTO HP
Better comparison / contrast numbers.
Also none of the engines that they are talking about are common rail engines, so I don't understand your last statement???
Assumed that the 2650 engine was common rail but never owned either of these so incorrect assumption.
Given mechanical injection, it might be easy/inexpensive to increase engine speed to 2,800 for a largely unnoticeable 1.5 HP boost above rated PTO speed.
SDT
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North Idaho Wolfman
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I would prefer the added HP at the current RPM. That would basically require a turbo.
I knew a lot about my old blue tractor mechanically. Aside from what is common to most tractors, I do not know much about my new B2650, mechanically or electronically.
I knew a lot about my old blue tractor mechanically. Aside from what is common to most tractors, I do not know much about my new B2650, mechanically or electronically.
I know you said it was sized about right for you, but I would strongly consider a L3301 or L3560 if you want more luxury. More problem free setup than what youd find in the larger B.