16 more HP from the same size engine?

[Dargo]

i know how they sound, i guess that's why i'm wondering why i'm not hearing mine.

I suppose there are a lot of variables. I don't hear the turbo in my RTV1100 unless I really listen for it. And, yes, my RTV1100 does have a turbo

 

[Egon]

The B5.9 turbo diesel in marine trim will run 24-7 while producing about 400 HP. OF course it does not have the flexibility of an on-highway version as in the Dodge pickup.

Pat

 

[MBDiagMan]

Interesting. I looked up my JD engine, the John Deere PowerTech 4045 engine. In a 5425 that engine puts out 81 engine hp. Move all the way up to the JD 5105 (newer model and model numbers) and it has the same John Deere PowerTech 4045 engine but puts out 105 engine hp. That's 23 more hp from the same engine from the factory. I say "from the factory" because there's all sorts of hp you can get out of a modded diesel which may, or may not, be reliable and durable.

I suppose it sort of makes me feel good that my tractor, a JD 5525, is sort of in the middle and puts out 91 engine hp. Apparently JD feels that the same engine will take at least 14 more hp. Besides, I honestly didn't know how many tractors JD puts their PowerTech 4045 engine in. Maybe it's one of their good workhorse engines? (with fingers crossed). Anyway, with that 4045 engine the factory power output ranges by 23 hp.

Yes, I understand your comfort from having the same engine putting out less horsepower which makes it seem that it would be longer lasting. I've seen this with other engine families, but often there are other changes in the bottom end for the higher power versions. The most common change is the addition or improvement of oil squirters for piston cooling, different piston configuration and other improvements.

I have no idea if this is the case with these engines or not. The good news is that these are TRUE industrial engines and however they laid them out it's a safe bet that JD knows that it will fill the bill in the reliabilty department.

 

[Zebrafive]

A little off the subject, BUT would these "same engines", making different HP, only make as much HP as required to do the job?

Example, if both were brush hogging and it only took 30HP to do the work, would a JD 5425 with 65 PTO HP be making 65HP? And a JD 105M with 90 PTO HP be making 90HP doing the same job? Or would both only make as much HP as required to do the work? Both running at PTO rpm.

I do not know the answer, just something this thread got me thinking about.

 

[dex3361]

Good question. The governor controlled engine will send enough fuel to keep the engine at the set RPM at the engine is making enough HP to keep the governor at the set RPM. That is why the fuel consumption is tied to the HP being generated within reason.

 

[Reg]

A little off the subject, BUT would these "same engines", making different HP, only make as much HP as required to do the job?

Example, if both were brush hogging and it only took 30HP to do the work, would a JD 5425 with 65 PTO HP be making 65HP? And a JD 105M with 90 PTO HP be making 90HP doing the same job? Or would both only make as much HP as required to do the work? Both running at PTO rpm.

I do not know the answer, just something this thread got me thinking about.

Nope;
Think of the power as a "withdrawal on demand" (-:
You put whatever attachment you decide on the 3 pt, set the rpm to get 540 (or 1,000) at the shaft and go to work.
The governor maintains that speed.
If your implement runs into heavy work the engine will tend to bog down, but the governor will attempt to maintain that speed.

Horsepower is a measure of a rate of doing work, i.e. it is force times speed.
A 20 HP load on a 65 HP tractor will "draw" 20 HP, no more.
To get that same tractor to put out it's 65 HP you would need to increase some combination of speed, working width, toughness of task, etc by a factor of just over 3.

By analogy, if you plug a toaster or coffee pot into a portable generator or a wall outlet it will still draw the same 1,000 maybe 1,500 Watts.
The 3 Kw generator puts out 1/2 to 1/3 of it's power capacity for this.
The local power station ? Well, it probably has multi-megawatt capacity, point is the toaster or coffee pot only draw the same load, regardless of the capacity of whatever they are plugged into.

 

[jd110]

Interesting. I looked up my JD engine, the John Deere PowerTech 4045 engine. In a 5425 that engine puts out 81 engine hp. Move all the way up to the JD 5105 (newer model and model numbers) and it has the same John Deere PowerTech 4045 engine but puts out 105 engine hp. That's 23 more hp from the same engine from the factory. I say "from the factory" because there's all sorts of hp you can get out of a modded diesel which may, or may not, be reliable and durable.

I suppose it sort of makes me feel good that my tractor, a JD 5525, is sort of in the middle and puts out 91 engine hp. Apparently JD feels that the same engine will take at least 14 more hp. Besides, I honestly didn't know how many tractors JD puts their PowerTech 4045 engine in. Maybe it's one of their good workhorse engines? (with fingers crossed). Anyway, with that 4045 engine the factory power output ranges by 23 hp.

Actually John Deere is now producing the 4045 engine at HP ratings up to 173 HP. Check out this pamphlet for powerplants in industrial applications.
Interim Tier 4/Stage III B Selection Guide

 

[Zebrafive]

Thanks REG. :thumbsup:

I was hoping that was how it worked, but not sure.