Small Diesel Engines - Natural Aspiration vs Turbo Charged?

[Industrial Toys]

If you are squeezing more horse power out of an engine, doesn't it make more heat?

I hardly see that Turbo HP is FREE?

When we bought our 6200 JD, there was a 6300 and 6400 with higher HP but the same Engine. I PERSONALLY, like something working less, rather than whipping the crap out of it, to it's maximum output. Just like, I would never chip my truck for more HP!

 

[welyell]

As a Diesel Development engineer for about 35 years, all I can say is that there is a lot of bad or ill informed information in this thread.

Rather than getting into a pissing match, I値l leave it at that.

Can you please provide additional information? As a person who in the next 12 months that will be making (to me) a HUGE financial investment in a piece of equipment, I really would like to read your input in the specifics of small diesel engine naturally aspirated vs turbo charge setups.

 

[mred2]

Yes, cover exhaust when transporting equipment. Turbos have oil lines going to bearings. Bearing are being oiled while the engine is running. If you spin the bearing for 2 hours with no oil, it is not good. Ask any large equipment dealer, Cat or Deere.

Turbos are one more thing on an engine to go bad. If you don't need it, don't add it. However, because it provides more air to the engine, it's use in today's engines is not only to provide more power but also for cleaner burn of the fuel. I have been told that a lot of smaller tractors are having the turbos installed to meet the EPA regulations.

 

[Industrial Toys]

I always had to wonder. Just where is the air going on your uncovered exhaust? Are the pistons moving up and down too as you drive down the road? Better make sure it's not in gear. lol

 

[TMGT]

I always had to wonder. Just where is the air going on your uncovered exhaust? Are the pistons moving up and down too as you drive down the road? Better make sure it's not in gear. lol

Back out an intake valve if 1 or more cylinders is at the overlap point,
It's more of a "in case it happens" then it'll happen everytime. If it does start spinning it doesn't take too long to do damage to the bearings with no oil and the turbine shaft spinning.

 

[CobyRupert]

Turboes are a very simple construction, two fans, an axle, two bearing and two seals, almost everything on your tractor is fare more complicated constructions.

Right! It's not rocket science!
But.... (like the saying goes): "Rocket science is easy, it's rocket engineering that is the difficult part".

(Translation: the principles of operation are simple, it's getting the right material properties, tolerances, bearings, seals, heat ranges, etc... that are tricky.)

I still believe the turbo is the "weak link", longevity-wise, on a diesel engine that (typically) can go 100's of thousands of miles (or 1000's of hours). But they do improve efficiency/horsepower. That said, my tractor has a turbo, I don't think I found an alternative when shopping that didn't have one. It's the only "vehicle" out of 5 that does. My wife was recently looking for a small sedan/wagon. It was very hard to find a car that didn't have a turbo.

 

[Agvg]

Last week I tryed a car, 1.2l gasoline engine with turbo and 130hp, it pulled like diesel from low rpm and was very fuel efficienct, so turbo is a must on engines if you don't want a very large and heavy engine using a lot of fuel.

On cars with diesel a turbo is just a must.

 

[ruffdog]

I own a little Steiner with naturally aspirated 3 cyl Kubota. Ventrac "apparently" had all kinds of heat related issues with their similar turbo powered units. Unless I understood it totally wrong, Bobcat had the same problems with early Toolcat Turbo units.

The older Toolcats used a Kubota engine and I don't know if they had heat issues. The newer Toolcats use a Doosan turbo engine that is Tier 4 compliant but does NOT use a particulant filter OR DEF fluid. YES!!! Tier IV without the bad things!

Bobcat Company released the Tier 4-compliant 5600 and 5610 Toolcat utility work machines that incorporate a non-DPF (diesel particulate filter) engine solution. These machines also feature a traction control system designed to provide operators with better mobility when ground conditions are conducive to traction loss, or the machines wheels encounter obstructions, such as rocks or debris. The Tier 4 Bobcat non-DPF solution was achieved by designing an ultra-low particulate combustion (ULPC) engine. The ULPC is accomplished through a specially designed engine combustion chamber that significantly reduces the amounts of particulate matter created during combustion. Therefore, Tier 4 emissions compliance can be achieved without using a DPF.

I heard that Bobcat was coming out with new tractors. Are they also not going to need DEF or regens? That would be a big selling point for me.

 

[Ortimber]

The older Toolcats used a Kubota engine and I don't know if they had heat issues. The newer Toolcats use a Doosan turbo engine that is Tier 4 compliant but does NOT use a particulant filter OR DEF fluid. YES!!! Tier IV without the bad things!

Bobcat Company released the Tier 4-compliant 5600 and 5610 Toolcat utility work machines that incorporate a non-DPF (diesel particulate filter) engine solution. These machines also feature a traction control system designed to provide operators with better mobility when ground conditions are conducive to traction loss, or the machines wheels encounter obstructions, such as rocks or debris. The Tier 4 Bobcat non-DPF solution was achieved by designing an ultra-low particulate combustion (ULPC) engine. The ULPC is accomplished through a specially designed engine combustion chamber that significantly reduces the amounts of particulate matter created during combustion. Therefore, Tier 4 emissions compliance can be achieved without using a DPF.

I heard that Bobcat was coming out with new tractors. Are they also not going to need DEF or regens? That would be a big selling point for me.

This is interesting, but they still use EGR (yuck) and a DOC system. I think others are also using this setup and it’s not exclusive to Bobcat. Now is it better, I have no idea??

 

[Industrial Toys]

It's funny when some companies or people are eagerly describing new technology.

What I hear is, it's complicated, it's complicated and then it's even more complicated. Yeah, just what I want and need! Absolute and total reliance on one particular company:thumbdown: