Hi, Does anyone have a chart that shows the torque curve from say 1400 rpm and up?

I am thinking about using a 6.2 to power a 1800 rpm generator either a 20KW or 24 KW size and would like to find a torque chart to figure out if I can just go 1 to 1 on the pulley sizes or if the engine needs to be up at a higher rpm to provide torque for full load operation of the generator.

http://cgi.ebay.com/24KW-ST-Generator-Head-1-Phase-for-Diesel-Gas-Engine_W0QQitemZ330278469705QQihZ014QQcategoryZ106 437QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Thanks, Dave

http://skylab.org/%7Ezetan/van/GM62-NA-v-turbo.png

Hi you will need 39 hp to power that generator .

The 6.2 get it's full power range at 2200 rpm and you only need 1800 so you will be just a little before that range . You will have about 130-150 hp avalable at 1,800rpm :cool: that will be OK

an old VW 1.6D will be more than sufficiant for that purpose it developpe 52 hp:D and will use 0.25% of the fuel that your 6.2 will use.

Ed

Thanks very much gentlemen! Looking at that chart it shows about 225 ft lbs at 1250 rpm and using the formula of :

(convert torque to horsepower by multiplying torque by rpm/5252) I come up with 53 hp at 1250 rpm.

So I could set up the pulley ratio to run the engine about 1300 rpm and 1800 rpm at the generator and probably wont burn much fuel.

Tigman: I dont have a VW diesel handy , but I do have a 6.2 :) Its still in the 1985 M1008 K30 military truck. I will post pics after I get the project rolling . I think you all may end up quite surprised by what im going to do. Thanks, Dave

The non turbo 6.2 apparently put out about 100 to 120 hp stock from various sources. The conversion of torque on the graph here of 260 ft lb at 2250 rpm converts to 111 hp.

still way overkill.....how about hooking up 3 or 4 of these .....run the motor on WVO and hook up to the grid?? Collect $.10 a kw.......

Ok maybe not.......but thats cheaper than solar panels LOL

dont get me started!!!!!!

seriously, get the little VW diesel, because your gonna kill that 6.2 by running at such a low rpm constantly...it's gonna hate you....these engines like to be run at around 2200 rpm for optimum efficiency, idling and running at a low rpm scuffs cylinders and pistons, which we all know is a bad thing

Well I havent bought the pulleys yet, Wasnt aware of the low rpm problems. I can set it up to run at 1800 or 2200 if that is happier.

If you can make it direct drive and forget the pulleys. 1800rpm will be just fine.

Ed

pm sent to davo727......

The non turbo 6.2 apparently put out about 100 to 120 hp stock from various sources. The conversion of torque on the graph here of 260 ft lb at 2250 rpm converts to 111 hp.

Please do remember that your modified exhaust (I mean, I assume you'll modify your exhaust?) will make a difference in the torque curve. I don't know exactly how it works with a 6.2, but different diameter/length of exhaust can move that torque curve around quite a bit.

you could also turn the fuel in the injection pump way down so the engine only makes around 50 horsepower and youll save fuel while running the generator

I'm not certain that would work/be good for the motor...

ok it was just an idea i had

50hz gensets run around 1200rpm instead of 1800rpm for 60hz, with good cooling and thermostats, wrap exhaust to hold in heat and dry out exhaust. the nice thing about low speed is how much quieter they are. if you can get parts for good price i say go for it, if not turbo engine could setup electric blower to feed intake, would help reduce build up in exhaust system. nice to have reserve power in generator prime mover. you could use higher thermostat temp on engine.