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High reving diesel engines and torque.

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Greg P Alexande

08-01-2006 04:22:23

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I'm looking at buying a neighbors heston 115-90 to replace my very worn out deere and to hopefully help him out with some finances. so i did a bit of research and found they use hi reving iveco engines, my deere is a 4020 and the specs say it's a 6637 cubic cm engine, 106hp at 2500 rpm and 353nm at 1100rpm
the heston is a smaller 5861 cubic cm engine and makes 115 at 2500rpm and 370nm at 1500. My 78 year old father doubts the heston can outpull the deere, as the deere has quite a larger engine and makes more grunt down low. also he tells me not to beleave the specs on old tractors. I don't realy wanto go buy a less powerful tractor then what i got, Can anyone give me an idea what to expect from that heston. also if anyone has any opinions or coments on these heston/fiats.

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B-maniac

08-01-2006 14:37:44

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Re: High reving diesel engines and torque. in reply to Greg P Alexander, 08-01-2006 04:22:23

That still leaves you with a worn out 4020 to do something with. I'm sure you have priced this idea out already,but how nice would the 4020 be if you put the used Heston money into it? AND,it's not likely the Heston won't require any money put into it after a while either. This is what I would be looking at instead of HP and RPMs.They both look pretty equal on that front anyway.If finances have been tight for him,how has the maintenance been on th Heston. You say the 4020 is worn out,but how much better is the Heston.Once you go through the JD,you at least know what you have AND how long it will last.Only you can decide how much helping a friend out tips the scale here,but on the tractor issue alone,I would give the ole 4020 the nod.I am a little prejudiced too.

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Majorman

08-01-2006 08:51:06

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Re: High reving diesel engines and torque. in reply to Greg P Alexander, 08-01-2006 04:22:23

Over here John Deere were viewed as high reving low torque motors compared with some of the early Fordsons and IH when they first came into the country. I remeber setting up a fertiliser spreader and finding the 540 PTO speed was up around 2400 compared with the 1800 we were used to.

The Heston (Fiat) is a very good basic tractor. They are not full of complicated electrics and the engine will lug and go on lugging for many years. I have used that tractor and have a friend who will buy nothing else for nearly 20 years. He is a very careful Scotsman.

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buickanddeere

08-01-2006 06:08:50

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Re: High reving diesel engines and torque. in reply to Greg P Alexander, 08-01-2006 04:22:23

The concerns over rpm and displacement are mostly coffee shop talk. Some smaller engines can make as much power as larger engines if they are more efficient? E.g. if built with better breathing cylinder heads and combustion chamber shape. Generally a turbo diesel will be more efficient HP per lb of fuel than a natural aspirated. Dealer & factory support are vital deciding factors. Even though you are going to purchase used. Still take a walk through a Deere dealership and price a 6603. You can't make a deal on used without knowing new prices.

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Ken Macfarlane

08-01-2006 06:23:31

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Re: High reving diesel engines and torque. in reply to buickanddeere, 08-01-2006 06:08:50

hp is hp but if you have to operate it reved up all the time many people interpret that as the engine working harder whereas an older diesel that loafs is sometimes felt to be not working hard.

The torque in a tractor with good gearing isn't terribly important, if you only have 8 spds or something it becomes important because you won't be able to pick the exact gear you need. Torque rise /how good the injection pump can kick it up for momentary loads can make a big difference in how and engine feels too. A big old heavy slow spining engine has a little more time per cycle for the governor to respond and bump the juice for intermittant loads.

So why don't you try out the machine before you buy it? It is just nearby!

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