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Detroit Diesel 2-53 hp?


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  #1  
Old 02-25-2010, 06:01:30 PM
miltruck miltruck is offline
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Default Detroit Diesel 2-53 hp?

Not sure where to post this question, but does anyone have a chart showing the hp vs rpm for a 2-53 Detroit Diesel? Have not been able to locate this info. Thinking about using one of these "little" engines @ 1,200 rpm with a 12.5 KW gen end. Just not sure if there is enough HP at this speed. And, yes I know about the 2-71 units, but I just like the 53 series engines a little more; less weight, more noise, less fuel use.
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Old 02-25-2010, 06:38:57 PM
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Default Re: 2-53 DD hp?

Which Series Injectors???
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Old 02-26-2010, 10:59:43 AM
miltruck miltruck is offline
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Default Re: 2-53 DD hp?

Engine tag says S45, which I think is still right as the motor appears to be untouched.
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Old 03-12-2010, 06:23:28 PM
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Default Re: 2-53 DD hp?

Found this @ yahoo Detroit Diesel site:

2-53 w/ # 35 injector= 34 hp @ 1800 & 36 hp @ 2000
w/ #40 injector= 39 hp @ 1800 & 41 hp @ 2000
w/ #45 injector= 41 hp @ 1800 & 45 hp @ 2000 (stock in our set) This looks right as the gen set is 20 kw @ 1800 and rule of thumb is 2 hp per kw (or so)

They also listed the 2-71:
w/ #60 injector= 53 hp @ 1800 & 56 hp @ 2000
w/ #70 injector= 61 hp @ 1800 & 65 hp @ 2000
If the hp curve is straight, these numbers also look right as the 2-71 @ 1200 would be about 40-42 hp.

no info @ 1200 for either engine!!
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Old 03-12-2010, 07:28:25 PM
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Talking Re: 2-53 DD hp?

This is very Good Information for the Forum... So Thank You for Posting it. From what I remember of the Detroit Power Graphs, they are reasonably Linear, and I suspect ONE can extrapolate from the Data given, down to the 1200 Rpm Horsepower for each of the Injector Series.
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Old 03-13-2010, 12:37:09 AM
cornbinder89 cornbinder89 is offline
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Default Re: 2-53 DD hp?

I would not run either engine (-71 or -53) at 1200 RPM... Those 2 strokes need the RPM to keep from burning up. If you lug them down the rings will stick... There not called "screaming Jimmies" for nothing... they need RPM.
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Old 03-13-2010, 12:54:39 AM
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Default Re: 2-53 DD hp?

10's of thousands of 2-71s have run in railroad cars for 10's of thousands of hours, all at 1200 RPM, and they seem to work pretty good there. IMHO a 2 stroke DD is not happy at 1800 RPM
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Old 03-13-2010, 10:07:20 AM
Jim Rankin Jim Rankin is offline
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Default Re: 2-53 DD hp?

The torque curve being almost linear like you said means that when you lug one, you do not get a big torque rise to help pull you on through. Detroit diesels are not noted for lugging well, but one set up for a load that matches the engine torque curve at that rpm should do fine.

They don't sound too happy any time unless you like that brand of "music", but they do run long hours at both 1200 and 1800 rpm. I think all of the modern ones in industrial use are rated at more like 2100 rpm under load, plus the droop no load, so they certainly can live there too.
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Old 03-13-2010, 11:06:53 AM
cornbinder89 cornbinder89 is offline
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Default Re: 2-53 DD hp?

The rail car sets have two speeds... one for "full load" and then they throttle back and turn the compressor at a slower speed and less load. If you are going to load it heavy, 2 stroke Detroits need to turn faster the 1200... From what I understand, he is planning to load it... as he was concerned about hp at that rpm. AT 1600 I would say he is ok... there is a reason the -53 series is a 2800 rpm engine... the -71 is a 2100 or sometimes 2300 rpm. 1200 would be lugging IMO.
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Old 03-13-2010, 01:28:44 PM
pegasuspinto pegasuspinto is offline
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Default Re: 2-53 DD hp?

They do have (Had?) 2 speeds, they would run at 1200 when under load, and have a solenoid to kick them to 800 'idle' when not loaded (they had NO auto-start, so they had to run 24/7). All three I pulled the motor out of had disabled the idle mode. My personal one has the idle solenoid, but it wasn't used anymore.

Robert
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Old 03-13-2010, 01:39:18 PM
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Talking Re: 2-53 DD hp?

The RailCar Units that are being discussed here, are Stationary 1200 Rpm Direct Coupled Gensets. There were literally 10's of thousands of these built, with millions of Operational Hours since their introduction, and they have been showing up on the surplus market, just in the last decade or so. They were used to power Refer Railcars, as well as Refer-Vans on FlatCars. They were also used on Marine Barges and Over the Road Trucking, for the same purposes. I first ran across them, in Remote Telcom sites back in the mid 60's, where AT&T had standardized on these type units for Remote Site Power. These had Extended Run LubeOli Sumps and LubeOil Centrifuges for 6 Month Service Cycles, on 24/7/365 type Operations.
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Old 03-13-2010, 08:21:25 PM
cornbinder89 cornbinder89 is offline
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Default Re: 2-53 DD hp?

1st, unless I am mistaken, the rail car units were -71 series and not the -53 (which is a higher rpm engine). 2nd, my understanding was: they ran at 1800 full load and dropped to 1200 once the car was cool... this messed with the cy/sec but as they ran only 3phase compressors, it slowed the compressor and there was little load on them in "slow mode"..
Again, unless I mis-understand the post... He is looking to load the engine at 1200 rpm which is too slow for a 53 for long life. Fine if it is very lightly loaded (whch will be only slightly above idle for a -53) but not for a heavy load..
the rail-car units were a special case and they were taylored to that situation. The rail-car units (again as I understand them) were only 60 hz @ 1800 rpm, and as the hz dropped so did the load (rpm of the compressor).
I would suggest, if you want to know about the engine end, you speak to someone with a lot of experiance with Detroit 2 strokes... People can say this was done in that case, but if you want to know what you can load a 2-53 to at what RPM, A Detroit expert who has the factory guidelines to back up what they say would be more useful then extrapolating on what was done on rail-car units and trying to apply that to a different engine.
I would recomend posting on Yahoo's Detroit Diesel site... There is an ex Detroit Diesel employee who has most if not all the application guides (for selling these engines to equip MFG's.) that could give you the factory recomended min RPM for load. He goes by Junkmandan...
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Old 03-13-2010, 08:35:02 PM
Wayne 440 Wayne 440 is offline
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Default Re: 2-53 DD hp?

The single 2-71 "railroad" unit that I have seen was rated for 1200 rpm and 800 rpm, 60hz and 40hz respectively according to the gen-end data plate. The speed control had also been removed from it at some point, so it ran at 1200 all the time.
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Old 03-13-2010, 09:41:33 PM
cornbinder89 cornbinder89 is offline
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Default Re: 2-53 DD hp?

Ok, I could be mistaken on the RPM... The 60/40hz I knew and the 2-71 also.
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Old 03-14-2010, 12:34:11 PM
miltruck miltruck is offline
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Default Re: 2-53 DD hp?

Thanks for the feedback, and yes, I was thinking about using the 2-53 @ 1200 rpm with a 12.5kw gen end (22-25 hp), but have now revised the plan. Bought another 2-53 that is well used and in need of rebuild, so I think I will get one of the 20kw or so gen ends that show up on e-bay and run the set at 1800 rpm. With a 12 lead set, I can get any voltage I need.
Again, thanks; this is a great site!
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Old 11-29-2010, 04:12:58 PM
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Default Re: 2-53 DD hp?

I know this is an old thread, but here are the photos of the rebuilt 2-53 mounted on test skids. Has about 5 hrs on it unloaded to date. Air compressor was an after thought, because I got it so cheap.
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Old 11-29-2010, 04:29:02 PM
Slick 50 Slick 50 is offline
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Default Re: 2-53 DD hp?

Very nice. Is that a 67 390 in the back ground?

Rick
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Old 11-29-2010, 07:16:54 PM
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Default Re: 2-53 DD hp?

It was originally a 428 car, no air, no power brakes, no power steering w/ 4 speed, HD brakes and HD springs. Came from just south of Cincinnati in Kentucky. Now has an original all iron 427 SOHC w/ 4.56 gears and Holley 4v injection.
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Old 11-30-2010, 01:20:13 AM
K D Redd K D Redd is offline
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Default Re: Detroit Diesel 2-53 hp?

That F ound O n R oad D ead will be a FUN Ride.

Kent
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Old 11-30-2010, 07:27:53 AM
Wayne 440 Wayne 440 is offline
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Default Re: Detroit Diesel 2-53 hp?

With that 427 in there, this could be a case of First On Race Day.
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