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Author Topic: 3hp Lister CS how big a generator can one drive  (Read 329 times)

old seagull man

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3hp Lister CS how big a generator can one drive
« on: September 02, 2018, 04:12:34 AM »
Just wondering how big a generator a real 3hp CS could drive as a backup generator?
 or is it more suitable to drive a 24volt alternator and charge batteries in stead?

rleonard

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Re: 3hp Lister CS how big a generator can one drive
« Reply #1 on: September 02, 2018, 04:17:36 AM »
roughly 1.5 kw
Faster - Better - Cheaper  You can have any two, but not all three

glort

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Re: 3hp Lister CS how big a generator can one drive
« Reply #2 on: September 02, 2018, 05:53:16 AM »

You could always Turbo the thing to get an extra couple HP.   :D

For a backup batteries are probably expensive for the times they will be used.  What would you need backup for?  Fridge, TV, Lights? Should be able to run those off 1.5 Kw if you are careful and don't try to start fridge and freezer at the same time.

old seagull man

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Re: 3hp Lister CS how big a generator can one drive
« Reply #3 on: September 02, 2018, 06:01:08 AM »
I thought the supercharging, would have been  the was to go, you already have somewhere for the belt to go.  ;D
GM 671 Blower on a Lister, thinking it might not end well.

mike90045

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Re: 3hp Lister CS how big a generator can one drive
« Reply #4 on: September 02, 2018, 06:48:50 AM »
Just wondering how big a generator a real 3hp CS could drive as a backup generator?
 or is it more suitable to drive a 24volt alternator and charge batteries in stead?

I'd think a 3kw ST head would be a fair size.  Not too much windage loss (from too big of fan in the alternator), but large enough to allow for brief overloads.  The ultimate test, is to start it up, and start applying load.
1.5kw is a good start, and should be able to handle essential needs.  I would not expect to be able to sustain over 2kw

old seagull man

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Re: 3hp Lister CS how big a generator can one drive
« Reply #5 on: September 02, 2018, 07:10:07 AM »
thanks everyone, for your thoughts, there is a strong attraction to a "real Lister" as a kid we had 32volt lighting, and then  a start o matic, to keep mother happy.
i used to turn the light on to hear the engine start, when i was small.
it run till the mid 70,s when they got power.
We had a 3 day blackout this year and we survived on the 24 solar panels on the roof, and an old Honda e2500.
So there is an excuse to put something together just in case. So i'm doing a bit of research.


dieselspanner

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Re: 3hp Lister CS how big a generator can one drive
« Reply #6 on: September 02, 2018, 08:48:36 AM »
Hi OSM

Have a look through the archives at 'Starfire's early posts, lot's of good stuff with a 3/1 and car alternators.

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

glort

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Re: 3hp Lister CS how big a generator can one drive
« Reply #7 on: September 02, 2018, 12:16:01 PM »
GM 671 Blower on a Lister, thinking it might not end well.

I don't think there would be a start let alone  an end.
I forget the parasitic losses a 671 has but I can guarantee you it's tens of times what a 3/1 would put out in the first place.  Soon as the thing started boosting the engine would slow and the fire would go out.  :laugh:

Better off to get the blower WITH the rest of the engine still attached!

I have 2x 12v 80A alternators on my 6/1.  Each alt will do about a KW pretty easy.  For backup use you could get an alt and an inverter and just use the battery out of a vehicle  to power your basic needs.  120A commodore alts are easy and cheap to get as are falcon units and they would provide about all the electrical power the engine was capeable of  turning.


old seagull man

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Re: 3hp Lister CS how big a generator can one drive
« Reply #8 on: September 02, 2018, 12:50:36 PM »
Sorry joke fallen very flat.

Back in the 70's for a short time in worked  on a couple of Keith Black 426 Hemi's with  Weiland Blowers

Quote
You could always Turbo the thing to get an extra couple HP. 
It took me back to that moment, i still have a  Weiland air scoop some were, that would look good on the inlet pipe of a cs.

glort

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Re: 3hp Lister CS how big a generator can one drive
« Reply #9 on: September 02, 2018, 03:55:18 PM »

I wasn't aware Keith Blacks were around back then.

Mate of mine has a VERY well worn ( and  twisted)  KB sitting in his shed as an ornament.  Was in a Fueler that let go.... several times.

One pot of the black would do 50 Hp without the blower.

What is your preference with the Lister, battery or gen head?  The battery charging will be a lot cheaper if you don't have the gen head already.