turbo diesel tractor or not???

[Kubotasrking]

Okay, out of how many hours total?
Bob

7 words say alot.

 

[IslandTractor]

Intercoolers, like a radiator, also reduce the air flow to the engine reducing some of their advantage; also check out the reason for twin turbo engines.

Not sure what you mean by this. For a water cooled diesel, the amount of airflow around the engine is not an issue and for a tractor that does a lot of it's work standing still or moving slowly I don't see how an intercooler has any effect on engine cooling. Diesel generators have virtually no air movement around them and do fine. If you are implying that air for combustion is reduced, I don't think that is true if the intercooler is matched properly to the engine. The main reason I know of for twin turbos rather than one large one is to minimize the spin up time as it is easier to start small turbo fans than heavier larger ones. That should not be an issue with tractors where jack rabbit starts or passing acceleration are irrelevant.

 

[dfkrug]

My new Mahindra 3215 is turbocharged, which adds 3 or 4 horsepower. But my impression is that the "boost" is set at the Mitsubishi factory to be very conservative, quite low. QUOTE]

I almost bought a Mahindra 3015, which is also turboed. The most
impressive thing is how quiet it was. That's a big deal for me. I
need hearing protection with my JD955. The most puzzling thing
about the 3015 is that it is 1.5 liters and only 30hp. My JD is a little
less than 1.5 liters and rated at 33hp. My Kioti is 1.5 and 30hp. Even at
a few pounds of boost, that 3015 should be much higher. Maybe they
are just under-speccing it?

Another case in point. Yanmar has recently come out with their new
entry level industrial TLB, the CBL40. It has essentially the same motor
as in my JD955, but turboed to get 40hp. THAT'S what I would expect.
Fantastic machine, BTW.

 

[Soundguy]

A high fuel/air ratio will cause detonation in the engine that will shorten the life and reliability. Just give your diesel a good strong shot of ether or starting fluid before starting on a cold morning, and listen to the valves "sing!!!" The intercoolers help that cause.

If you are talking about precombustion.. then there are ways to combat that. If you are talking about plain compression ignition.. then you have to have that anyway.

I don't use ether on a diesel.. besides we are talking about 2 different things.. ether explodes.. diesel combusts..

Soundguy

 

[RobJ]

A high fuel/air ratio will cause detonation in the engine that will shorten the life and reliability. Just give your diesel a good strong shot of ether or starting fluid before starting on a cold morning, and listen to the valves "sing!!!" The intercoolers help that cause.

If anything I guess you can say the intercooler like a turbo will shorten the life of an engine. The turbo allows more power out of a same size non turbo engine. The intercooler on top of a turbo allows for a bit more power to come out of the same engine. So the same size engine will have a greater load on it's internal parts.

But turbos make that cool noise.

 

[RobJ]

Wow.. why the huge difference in enge hp and pto hp??

Looking a little more closely at Nebraska Tractor test results, NH is advertising lower HP ratings than actual test results. The TL100A is coming in at 88 PTO rated HP vs. 85 advertised PTO HP. The TS115A is coming in at 101 rated PTO HP vs. 95 advertised PTO HP. I can't answer the question regarding the difference.

Seems if you look closer at the numbers the bigger 6 cyl only produces 5-10 more hp than the smaller 4cyl. The 6 at 411ci or close to it(NH site is hard to look at IMO, don't quote me). Looks like another detunning of a diesel. Note the 115-135 all use the same 411ci diesel but rated at different hp...Might be able to read the cut-n-paste. OK cut-n-paset no worky that well... here is the link.. http://www.newholland.com/FILES/tbl_s25SeriesText/PDFUpload290/1542/TSA_specs_022306.pdf

 

[machmeter62]

My question to some of the gentlemen who believe the reason of intercoolers are for increasing molecules of air for increased HP; why wouldn't the manufactures save money by increasing the size of the fuel injectors only, and getting the same results?? I assume that others have done this to their diesel engines, and save money without damaging their engines? I know turbos are added for power and truly aid in higher altitudes for the same reason. Is the cost of a bigger engine/tractor greater than a less tractor with a turbo? Seems to me more weight would be wanted? What is the HP gain for the same displacement engine; turbo vs non turbo in % or net gain HP? Maybe the "chip route" to the tractor engine is possible as a money saving alternative also? I have not followed the tractor market for turbo engines on smaller tractors. Or are the manufactures targeting Colorado and the higher Great Plains region with smaller turbos?

 

[machmeter62]

If you are talking about precombustion.. then there are ways to combat that. If you are talking about plain compression ignition.. then you have to have that anyway.

I don't use ether on a diesel.. besides we are talking about 2 different things.. ether explodes.. diesel combusts..

Soundguy

The TWA B-747 that departed JFK enroute to Europe vanished in flight as a result of a kerosene fuel tank exploding without being compressed?? I believe kerosene and Diesel fuel have the same BTU content? I know from military experience JP-4 has more per gal, but for safety issues, civilian commerical aircraft are forbidden from using it, unless the law has changed?

 

[SkyPup]

Primarily because increasing the size of the fuel injectors will make the engine too rich and it will smoke and the EPA will not allow you to sell smokey polluting engines. Also, if the injectors are too large, raw fuel will hit the pistons and burn a hole through them in no time.

Most turbocharged diesels do not even use an intercooler since very few of them put out over 1/2 atomsphere of boost pressure and that is not enough to heat up the air molecules enough to worry about. It is only when the turbocharger compressor is putting out >8 psi of boost that the air temperature rises high enough to make an intercooler worthwhile. Of course, one full atomsphere of boost in a compressor @ around 80% efficency is going to create air temps over 325*F and require a major intercooler to make use of all the increased air flow, which is virtually worthless otherwise....

Turbochargers are just devices to make a turbodiesel engine more efficient, more powerful, and more economical per unit of fuel.

 

[Turbys_1700]

well i dunno what mechanic told you that but i know that at the company i work for as a mechanic we have many trucks on the road, mostly garbage trucks so pretty severe service, and there are many with 15 thousand hours or more and still alot of life in them, infact two of the IH recycling trucks have around 25,000 hours and have never had a turbo, injection pump, injector or any internal engine work done to them. now they are an unusual case, and i would not expect that from any engine, i suppose we have just got lucky realy. but i will say the last engine failure we had was an 8.3 cummins in a garbage truck, it had 16,000 hours on it and the only reason it died was a blown head gasket and the driver thought he could finish the route, totaly cooked the motor. if the driver had stopped and called in it would have most likely been towed in, had a head gasket put in and then have been back on the road. maybe 20 or 30 years ago 4 to 6 thousand hours was the norm, but today thats nothing. heck thats only 2 or 3 years of fulltime use

You stated the difference in your first sentence. I was refering to a mechanic that works on farm tractors, not over the road diesels. I've never seen a farm tractor with 16,000 hours on the original engine. Two completely different applications.