Fill me in on the turbochargers

[xring100]

So the L series does not have turbo but the B series does interesting

 

[MtnViewRanch]

If you want to "look" for used, 3215 & 3316 Mahindra tractors have a turbo on them. These can be found for about $15K, and are rated at 32HP. I'm sure that there are other tractors out there that also have a turbo.

 

[C4Ranch]

L series do have turbos on some models, mine is. Granted a little bigger than he's looking for but hey, I got it used too

 

[ShowroomShine]

Turbos do nothing for emissions, the are simply a power adder.

A turbocharger allows you to stay in the same gear or speed longer compared to a gear transmission. Think automobiles. A n/a car will have to downshift going up a hill to maintain speed, a turbocharged car can use the "boost" to help keep the engine at a set RPM and therefore, a set speed.

Turbochargers on engines are great, allow you to use more of the power of the tractor, and keep you moving when the going gets tough. They do need some cooldown time as others mentioned.

 

[hhsco]

booooooring

 

[jeffgreef]

Thnx for the input. I'll turbo it thru the mechanix of my thinking and see what the exhaust looks like.

 

[the old grind]

Shortly after cutting a deal on a JD 5210 I stumbled onto a 5103 that was at another dealership on consignment. Thinking I might have goofed & rushed in too soon on the former & might regret my prior commitment, to TractorData I go to compare 'em on paper.

Both use JD's 2.9L 3-cyl diesel (3029D vs 3029T). My NA is an earlier model ('99 vs an '06 IIRC) and turns out the differences in specs are pretty much nil, hp rating (& tested @PTO hp), hyd pump capacity, o'all weight, rear lift, etc. What I couldn't wrap my head around was the my older Deere is NA & the newer 5103 is a turbo.

Of course we don't often see torque curve plots to compare power-bands, but PTOs 'tested' to be within ~1/2hp at same engine rpm despite 3 hp higher 'rated' of the earlier NA. Much as I tend to read something into what's different on paper, whatever is there wasn't obvious in this case.

Might just be poor examples for comparison but to me the diffs were soooo slight as to wonder what the turbo doing there & why. Could be something more to what SS was getting at in post #14 say for drawbar pullin' but I sought hydraulic power & got it with a few more gpm on tap.

Now I wonder how often the turbo thing is 'take what you get' vs a 'gotta have'.(?) No regrets 'tall, but I came away baffled as always. :duh: (kind of a hobby at my age... :laughing Emissions/Tier "X" on '03-'08s??

 

[MHarryE]

Think of the turbo pushing more fresh air into the combustion chamber than atmospheric pressure alone. It's not free power because the turbo adds exhaust restriction, and the higher the boost pressure the higher the parasitic load but it can easily make up for that. Back in the early 1960s John Deere came out with the 4020 at around 90 HP and IH followed with the 806 at 94 HP (PTO HP that is). Allis-Chalmers had developed a nice 70 or so HP tractor but JD and IH blew it away with the 15 - 20 extra horses, do the manager of engineering, my boss to be, said no problem - we will have our engine plant add a turbo. The Allis-Chalmers 190XT was born. Had power to compete, and was easy to turn up the fuel and get even more power while those poor JD and IH owners were stuck with their naturally aspirated duds. Unfortunately Allis didn't beef up the power train. My boss to be said no problem - the farmers will not invest in larger implements. They will pull their current implements faster (higher gear). The farmers didn't bite - they bought wider implements they could pull at the same speed as before and the Midwest was strewn with broken gears - and my boss to be was relocated from the motherland - West Allis, WI, to Independence, MO, where the CEO would not have to look at him and be reminded. So, turbo on an engine supplies more fresh air that can burn more fuel creating more power without increasing engine size. A 4 cylinder engine can do the work of a 6 or even 8, and since there are fewer pistons rubbing the cylinder walls there is a lot less friction so the engine can be a lot more efficient. Like someone mentioned you also don't lose much power with altitude because in the less dense air the turbo spins faster and stuffs the cylinders with nearly the same fresh air as at sea level. The turbo engine will be more efficient but because it gas more parts it will be less reliable because there is more opportunity to have a bad part and it only takes one. A properly designed turbo engine, however, is every bit as reliable as a naturally aspirated engine if every part is built right. Yes, the oil can "coke" if you shut the engine down immediately after it has been working hard. The turbo likes to have oil feed as it cools but that is not normally a big issue. It's common sense on any engine to let it idle a bit after working hard to let the parts cool evenly. Most of the time I am running the engine slow as I park my tractor so I seldom do I have to idle any length of time.

Larger engines are designed to take more advantage of turbo boost. Our 7720 JD, for instance, is rated at 130 HP at 2100 rpm but by the Nebraska Tractor Test results produced 170 HP when running at 1800 rpm. Lots of available boost, computer monitoring the performance and feeding it all the fuel it can efficiently use until it senses that's enough.

On a CUT I wouldn't buy a turbo tractor just because it has a turbo but remember the company probably used a turbo instead of using a larger, less efficient engine. Kubota engines, for example, has a information on its site for all of its tractor engines so you can compare efficiency between engines. Direct injection is significantly more efficient than indirect injection. Turbo engines running at a specific power level are more efficient than naturally aspirated engines that produce that same power. Lower engine speeds, to a point, are more efficient than high engine speeds. Might be worth taking a look before you buy. They don't state on the engine site that this engine us used on this tractor but by comparing displacement, rated engine speed, and engine configuration it is pretty easy to figure out which engine goes where. Same thing with John Deere - they tend to have even more engine information.

 

[Verticaltrx]

Turbos do nothing for emissions, the are simply a power adder.

A turbocharger allows you to stay in the same gear or speed longer compared to a gear transmission. Think automobiles. A n/a car will have to downshift going up a hill to maintain speed, a turbocharged car can use the "boost" to help keep the engine at a set RPM and therefore, a set speed.

Turbochargers on engines are great, allow you to use more of the power of the tractor, and keep you moving when the going gets tough. They do need some cooldown time as others mentioned.

That is not entirely true, Deere is using turbos on the 5E series strictly for emissions reasons in the lower HP models. The higher EGT with a turbo is being used to burn off some of the emissions.

We have a Deere 5203 (45hp naturally aspirated) and a 5045E (37hp turbo) and I've spent plenty of time on 2150's and other 3029 powered tractors and equipment. The turbo is a very unwelcome addition on the 5045E. The 5054e is very sluggish compared to other 40hp tractors which I attribute partly to the turbo lag on such a low hp model. I have an IH 454 which has exactly the same displacement motor, and makes almost the same PTO hp, but it is naturally aspirated. It has much better throttle response and seems to have more low end torque. Also, in the application we use the 5045E in (chore tractor) I don't expect a very long turbo life from being started and stopped often. I personally avoid anything with a turbo unless it is absolutely needed to make power.

 

[Soundguy]

Turbochargers increase an engines volumetric efficiency. High altitude engines greatly benefit from this over NA engines.

Turbos do nothing for emissions, the are simply a power adder.

A turbocharger allows you to stay in the same gear or speed longer compared to a gear transmission. Think automobiles. A n/a car will have to downshift going up a hill to maintain speed, a turbocharged car can use the "boost" to help keep the engine at a set RPM and therefore, a set speed.

Turbochargers on engines are great, allow you to use more of the power of the tractor, and keep you moving when the going gets tough. They do need some cooldown time as others mentioned.