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26Kw Alternator and 4-53 Detroit Diesel?


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  #11  
Old 04-11-2018, 07:21:47 PM
bunkclimber bunkclimber is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

the 4-53 has more than enough power to spin your alternator under load and then some.That engine really starts to level out about 2000rpm and up,with an 1800rpm (4-pole)it would do OK.If you can turbo it it'l perform better but I think the turbo would have to be sized for mid-range rpm and not top end.One thing you'll have to change is the governor on the engine if it came from a vehicle..you need a droop governor or better yet,electronic governor actuating the fuel rack on the engine.The vehicle engine typically has a limiting speed governor,wrong type for a genset.If you go electronic governor you can bypass the present governor..a bit scary as I like some kind of limiter or shutdown.The newer digital governors you can program for overspeed.FWIW
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Old 04-11-2018, 08:26:46 PM
Birken Vogt Birken Vogt is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

The 4-53 has some kind of governor on it but it might be set at 2800 or something you would not want to go with an 1800 RPM alternator. You might be able to just dial it back to something more reasonable like 2000 and then let the electronic governor take over from there but you would have to be sure the mechanical governor was not also interfering. Knowing how Detroits act I bet this plan would work but ymmv....
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Old 04-11-2018, 11:10:18 PM
Charley K Charley K is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

Hi, My generator combo is a Mercedes 240d 4cylinder @70 hp on a 25kw Generac head running at 3600. The unit is sheaved at a ratio that works the engine at @ 2450rpms. This engine rpm limits the generator to 18kw.You could use belt and pulleys and pretty much tailor the rpms as needed. I used the electronic governor from the donor Generac to maintain the HZ. Works like a charm. You will need to figure the best rpm range to run the engine and ratio accordingly. At 170 hp I think you will have trouble with the engine wet stacking with light loads and a slow rpm out of the torque band. Good luck with your project, CK PS, I have a couple of posts on here of my build. There are a few pictures also. The guys on the forum were very helpful, some of the info may be useful to you. There was a post on here this morning showing an electronic governor on ebay, Would work well with your project.
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Old 04-12-2018, 12:28:24 AM
Vanman Vanman is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

Detroits have such fantastic mechanical governors! I can't imagine introducing electronics to them.

They drive six pole or four pole generators, so 1200 or 1800 rpm. A 453 turning 1200 rpm ought to be plenty of power for a 26 kw generator.

If the PTO generator had a 1000 rpm input, that'd likely work quite nicely as well.
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Old 04-12-2018, 01:01:29 AM
Birken Vogt Birken Vogt is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

I did not read back in the thread but since this engine was a fire pump your are right, it likely does have a good constant speed governor. If it has enough range to get down to 1800 RPM. Or maybe it is already set there, who knows what the fire pump ran at. Inquiring minds want to know.
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Old 04-12-2018, 09:25:43 AM
Charley K Charley K is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

If the generator is two pole, direct couple will put the engine out of the rpm range. 1200 rpm will also put the engine out of rpm range. 1800 rpm head would work but would be very lightly loaded and wet stack. The engine is to large for the project. Two stroke diesels don't fair well with light loads, fuel consumption will be high. Look around the internet, there is a lot of information regarding the governor. There is much well intentioned advice on forums. Do your research before spending your money. CK
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Old 04-12-2018, 10:44:17 AM
Birken Vogt Birken Vogt is offline
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Default Re: 26Kw Alternator and 4-53 Detroit Diesel?

71 series were run at 1200 RPM with smaller 6 pole generator heads. 12-15 kW if I recall correctly. I don't think there is any reason you could not do it with a 53 series. There might be minor issues with engineering items like cam timing, compression ratio, blower size, etc. but for hobbyist use it is probably just a small loss of efficiency. If you can get the governor to go that low without changing springs or something.

As always, beware of uncontrolled engine speed when messing with a Detroit governor.
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