Turbocharging new L3940 Gutless Pig Tractor

[PHILIP8N]

By no means would I endorse this. I think it is a bad idea, just get a bigger tractor.

But, here is the L3940 turbo enigne direct from Kubota.

I am sure it has lower compression ration pistons
Oil cooler
Turbocharger, intake manifold, exhaust manifold, and crossover pipe
Required fuel pump / fuel setting
Rated 55hp intermittent @ 2800 rpm

To compare L3940 with L5740, here are differences

L5740 has
Larger front grill opening to move more air
Probably higher capacity fan
Larger fuel tank
Higher capacity oil pan
Higher coolant capacity (larger radiator)
Larger capacity transmission case
Stronger front axle / drive train
Sure there are many others, this is just what I could find in few minutes

Good luck, Philip.

 

[trktrman]

Like a couple more have said, I'd trade it in for a larger tractor. Adding a turbo, successfully or not, will only decrease the resale value and make it harder to sell if you ever decide to in the future.
:2cents:

 

[art]

Just for thoughts boys, when checking tractors out for power on a dyno we often find that overheating issues are caused by bad injectors as the fuel is used to cool the engine cylinders. So now you add a turbo,(increased heat) a lean cylinder and you get a wasted cylinder and piston. Just what we have seen here!
I'd wonder if the tractor might be over weighted or what is going on here. Maybe a larger tractor is needed for the job to get over the pig syndrome!

 

[DT86]

You guys need to study up on diesels.

 

[JasG]

Just for thoughts boys, when checking tractors out for power on a dyno we often find that overheating issues are caused by bad injectors as the fuel is used to cool the engine cylinders. So now you add a turbo,(increased heat) a lean cylinder and you get a wasted cylinder and piston. Just what we have seen here!
I'd wonder if the tractor might be over weighted or what is going on here. Maybe a larger tractor is needed for the job to get over the pig syndrome!

What you describe comes from a leaking injector ( I believe anyway ) that is giving a poor spray pattern and/or fuel when it shouldn't be in there. The leaky injector can cause pre-ignition, engine knock and an engine problem.

Much of what I have read is that a diesel that is too lean won't run, too much fuel on the other hand can be an issue.

Although I do agree he should get a bigger tractor.

4. A diesel runs leaner air-fuel ratios than a gas engine. Run a gasoline engine too lean and there will be problems like overheating, loss of power, and a non-functioning catalytic converter. In the worst-case scenario, a gasoline engine seizes and the catalytic converter gets destroyed. In order for a modern gas engine's catalytic converter to work properly, it needs a minimum 14.7:1 air-fuel ratio. What's more amazing, is gas engines dump excess fuel under wide-open throttle to cool combustion. A diesel is just the opposite. When fuel is added to the engine, the exhaust gas temperature goes up, and when it runs lean, the temperature goes down. At idle its possible for a diesel engine to run an air-fuel mixture as high as 100:1, and the worst that can happen under these conditions is the engine stalls due to lack of fuel.

Read more: Diesel Fuel Advantages - Diesel Engine - Diesel Power Magazine

 

[Beltman60]

by the time you would buy a turbo and manufacture all the manifolds you would be money ahead selling it and buying a bigger tractor
my :2cents:

 

[JerryG]

You will have to turn up the fuel pump unless the turbo is just set to break even. If you don't it will damage your engine.

Please explain. I'm lost on this one.

There were companies which installed turbo systems to over come power losses created by elevation. Power is lost in high elevation areas. The turbo was set so that it had only enough boost to bring the engine to the level of power it would normally have at sea level.

 

[The Fred]

The tractor has 15 hours on it. I live on a steep hill. I am grading my driveway with a new 8 ft. land leveler with 2 rows of tines and 2 cutting blades.

Even with no implements in auto HDS it hunts between low and high. What a POS. I wanted a 4740 but can't get any longer because the 60 series came out with exhaust BS (thanks Obama).

Oh and I use "H" stands for hill on the range finder right?

Yeah I think it is a bit too small, the loader lifts very light loads only and engine makes little power. My old Cub Cadet 7260 will run circles around it.

I haven't made the first payment yet.

Thanks, Fred

 

[nybirdman]

"H" is high range and only for road use.I use M and toggle up and down.You should read your manual.
Another mistake new owners make with HST(me included) less pedal means more power,not down like a car or truck.

 

[MtnViewRanch]

The tractor has 15 hours on it. I live on a steep hill. I am grading my driveway with a new 8 ft. land leveler with 2 rows of tines and 2 cutting blades.

Even with no implements in auto HDS it hunts between low and high. What a POS. I wanted a 4740 but can't get any longer because the 60 series came out with exhaust BS (thanks Obama).

Oh and I use "H" stands for hill on the range finder right?

Yeah I think it is a bit too small, the loader lifts very light loads only and engine makes little power. My old Cub Cadet 7260 will run circles around it.

I haven't made the first payment yet.

Thanks, Fred

Would you please post a picture of your land leveler?