Author Topic: Largest displacement listeroid single ?  (Read 2886 times)

glort

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Re: Largest displacement listeroid single ?
« Reply #15 on: May 24, 2018, 07:39:45 AM »
  I can tell you it runs a 10 k gen head all day at full load with no issues

He said it runs a 10 k head, all day, not that he's pulling 10 k out of the head.............


I must be misunderstanding.  I would have thought that running at full load did mean he was pulling 10K out of it. But ya know, us Aussies are different down here....   :laugh:

glort

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Re: Largest displacement listeroid single ?
« Reply #16 on: May 24, 2018, 07:58:41 AM »
Isn't diesel about 1.5-1.75 HP per KW? Sounds feasible to me. May be into overload territory but may be doable.

I always thought it was closer to 2 Hp per kw.
If we say 1.5, that's 15 Hp.  For a 16 Hp 1000 rpm engine to do that at 640 revs, it would be a good one!

 I have a little china diesel that's rated at 3.5 Hp and will out-pull every 5 and 6 Hp engine I have every time.  That's why I'm thinking this engine may be a lot larger than 16 Hp but for some reason was under rated.
Looking at the chart below, they spec the same size engine as a 22@800 rpm as a 16hp at 670.  Probably the same one here.

dieselspanner

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Re: Largest displacement listeroid single ?
« Reply #17 on: May 24, 2018, 12:11:16 PM »
It's sort of a 'frame of reference' thing.

My CS is 'pulling a full load' when it's knocking out around 3 kw, the alternator is rated at 8, a bit like Uncle Elon and his Tesla data............

Cheers Stef
Tighten 'til it strips, weld nut to chassis, peen stud, adjust with angle grinder.

dieselgman

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Re: Largest displacement listeroid single ?
« Reply #18 on: May 25, 2018, 02:25:33 AM »
The rule of thumb that I use is .75 kW (theoretical) per horsepower, but this is just good for doing general on-paper calcs. The reality will be determined by additional factors such as the mechanical losses in the drive system - bearings and belts.

dieselgman
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glort

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Re: Largest displacement listeroid single ?
« Reply #19 on: May 25, 2018, 02:39:45 AM »
The rule of thumb that I use is .75 kW (theoretical) per horsepower, b
dieselgman

That probably is most accurate as a HP is 746W... although some seem to argue that as with everything electrical.  :0)

With Inverters I always work on 10X 12V input to 240V output.  People argue it's not that simple and they are right. There are endless variables like actual battery voltage, inverter efficiency, inverter voltage output, Resistance, voltage sag, Applicance actual voltage rating ( 220/230/240/250 and so it goes.
Just so happens though that the factor of 10 is conservatively in the middle so easy to calculate and a safe number to work by.
 Better to over allow than under in this case.

38ac

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Re: Largest displacement listeroid single ?
« Reply #20 on: May 25, 2018, 12:08:29 PM »
It is best for the novice to forget theoretical and go with 50% or 2 engine HP per KW.  NO legit manufacturer or assembler would  use the same rating for stand by and prime power.  Neither will they list peek and continuous ratings as the same.  There is a heck of a lot more to it than saying this engine is prim and proper for this alternator.  I always suggest alternator overkill when somebody is setting up a system. it costs little up front and very little operationally. Reason being an attentive operator can tell when he has overloaded things by listening to his prime mover. 

Back to the guy with the 16/2 pulling 10KW. yes, entirely possible. I have often talked about rack limiters and why Lister used them and the lack thereof on the Indian engines. There is not a doubt in my mind that a standard bore and stroke CS type India engine will pull more than the original rated horsepower, 6HP at 650 RPM and 8HP at 800. At 6HP a CS doesn't smoke black, not even close to it due to the rack limiter. All India engines can be operated at what the original designers called "over fuel" for starting purposes. How much extra HP does this produce? I cant say in terms measured on a dyno. However I have had both original CS 6/1 and India 6/1 clones belted up to the same loads and the India engine definitely has a HP advantage.  His 16/2 could very well be producing 18HP or more and darn well able to pull 10K
« Last Edit: May 25, 2018, 12:11:16 PM by 38ac »
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veggie

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Re: Largest displacement listeroid single ?
« Reply #21 on: May 25, 2018, 06:02:43 PM »
Indian stated HP Limits vs Actual....

One thing occurred to me is that the key stress components on the Indian engines may be a limiting factor.
They seem to have soft crankshafts. I wonder if the con rods and wrist pins are of true Lister quality and strength?
Perhaps the max HP rating of Indian machines is more related to metallurgy? Even if they are not bowing black smoke, they may still be close to disintegration  :o
LOL
Just a thought.

Veggie

PS: Don't forget to factor in altitude. I live at 3300 ft elevation and engines must be de-rated by 10% here.
« Last Edit: May 27, 2018, 04:03:09 PM by veggie »
- 6/1 GM90 Listeroid - Delco 33si Alternator
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BruceM

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Re: Largest displacement listeroid single ?
« Reply #22 on: May 25, 2018, 06:27:52 PM »
Good point, Veggie. I'm at 5600ft elevation and 25% derating is needed here.  Automatic chokes on small engines don't work well here, either.

buickanddeere

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Re: Largest displacement listeroid single ?
« Reply #23 on: February 04, 2019, 02:07:22 PM »
If you extrapolate via displacement  . A naturally aspirated diesel makes 1/4HP per cubic inch at 1800rpm.