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Generators & Electric Motors General Discussion

Company Selling Detroit 2-71 Generators


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  #21  
Old 07-28-2012, 07:46:16 AM
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Default Re: Company Selling Detroit 2-71 Generators

http://www.emerson2-71gm.com/index.html
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  #22  
Old 07-28-2012, 10:58:37 AM
pegasuspinto pegasuspinto is offline
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Default Re: Company Selling Detroit 2-71 Generators

Quote:
Originally Posted by richard.bessey View Post
and where my brother works they have an 8-71 in one of there trucks, WOW! In the cab, you have to wear hearing protection, power compared to the other trucks is low. It does have power once it is revved up. Overall, given the choice of the detroit, cummins, or cat powered truck, the detroit is always last to be picked.
Some folks are afraid to rev one of these up. Running a v12 or v16 DD at 1800 RPM-they do sound busy! An 8cyl DD at about 560 RPM would sound similar to a 6 cyl 4 stroke at 1500 RPM! But the DD needs to be at 1500 RPM as well...
is his 8-71 naturally aspirated or does it have a turbo?
The key to driving the DD power trucks seems to be 'drive it like you are trying to blow it up'.

One of these days I want to get a v12-71 detroit powered semi.

My 2-71 genset has an open pipe for now, it's not as loud as you might expect. Inside the house with the generator right outside, you can hear the rumble but it's not obnoxious. I think most of what I perceive as the sound is coming from the ground pounding. That has been one of the DD's problems, it's not the exhaust noise, it's the mechanical noise. I do have the open exhaust aimed at my nearest neighbors house, but he is 1/4 mile away through the woods, lol.

Robert
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  #23  
Old 07-28-2012, 11:42:51 AM
Wayne 440 Wayne 440 is offline
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Default Re: Company Selling Detroit 2-71 Generators

How to drive a 2 stroke Detroit Diesel powered vehicle-

(1) Check lube oil and coolant levels

(2) Slam hood on hand(s)

(3) Kick bumper and stub toe(s)

(4) Drive away
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  #24  
Old 07-28-2012, 12:30:25 PM
Ed Sparks Ed Sparks is offline
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Default Re: Company Selling Detroit 2-71 Generators

shouldn't that be fill oil and check other fluids?????
Every Detroit I ever drove we carried spare oil in gallon jugs.
Also be sure to carry a bag of speedy dry with you to soak up the puddle left behind while you had dinner.
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  #25  
Old 07-28-2012, 05:09:27 PM
USCGMatt USCGMatt is offline
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Default Re: Company Selling Detroit 2-71 Generators

They arent called "road oilers" for nothing.
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  #26  
Old 07-28-2012, 06:26:27 PM
Ed Sparks Ed Sparks is offline
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Default Re: Company Selling Detroit 2-71 Generators

I was assigned to the 31st Naval construction Regiment At Port Hueneme Ca when I came home from overseas in 1976. They put me in a military spec GMC long nose tri -axel tractor with a V-12 & 5x4 , 20 speed transmissions.

We hauled all sorts of overweight loads around California for the various branches of the military. We had 6 & 8 axel lowboy trailers and that truck could climb any grade at 45 MPH+ with 80 -100 tons on the trailer.

Of course they could hear us 2 states away.
Inside the cab with foam earplugs and shooters muffs over our ears and you could still go deaf after a few hours.
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  #27  
Old 07-28-2012, 09:03:48 PM
richard.bessey richard.bessey is offline
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Default Re: Company Selling Detroit 2-71 Generators

I hate this thread to get off topic (lots of stories about these old detroits, I know, maybe start another thread on them), so let me stear it back

Regarding this seller, I believe they are a reputable, I am a little curious why they changed location.
Anyway, the old 2-71's are good gensets, just loud and heavy
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  #28  
Old 07-31-2012, 11:44:51 PM
Seafarer12 Seafarer12 is offline
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Default Re: Company Selling Detroit 2-71 Generators

I wish I knew where they got them from. You know they at least double the price they pay for them.
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  #29  
Old 08-01-2012, 12:20:12 AM
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John Newman, Jr. John Newman, Jr. is offline
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Default Re: Company Selling Detroit 2-71 Generators

"... You know they at least double the price they pay for them..."

They also had to buy a large quantity of them to get that price.
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  #30  
Old 08-01-2012, 12:06:39 PM
turbodiesel09 turbodiesel09 is offline
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Default Re: Company Selling Detroit 2-71 Generators

I have seen a lot of Detroit Diesel generators from 3-53 to a 16-149, but I never saw a naturally aspirated one. They all have a blower and or 1 or more turbo's, the large 16-149 have Quad turbos on a lot of them. Reason being they are 2 cycle. I agree with a bunch of you all these generator's will be around after most of us or gone. When I hear the words naturally aspirated I think of an engine that has no blower, and or turbo on it. I could be totally wrong about this, but I have never seen one. Ed
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  #31  
Old 08-01-2012, 01:41:39 PM
pegasuspinto pegasuspinto is offline
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Default Re: Company Selling Detroit 2-71 Generators

A DD without a turbo is considered naturally aspirated. the 'blower' is NOT a supercharger but a scavenging blower, it's required for the engine to even run correctly. The blowers were 'borrowed' to become the superchargers of the musclecar era.

Robert
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  #32  
Old 08-01-2012, 08:56:24 PM
turbodiesel09 turbodiesel09 is offline
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Default Re: Company Selling Detroit 2-71 Generators

Thanks for clearing that up all of the I know that the 2 cycle engine needs to have a blower and or turbo on them.
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  #33  
Old 08-01-2012, 09:19:59 PM
J.B. Castagnos J.B. Castagnos is offline
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Default Re: Company Selling Detroit 2-71 Generators

A regular ported 2 cycle engine can't be supercharged, the intake ports close before the exhaust and therefore the cylinder pressure can't be increased. On a Detroit Diesel style engine you have intake ports and exhaust valves. If you were to close the valves while the intake is still open you can supercharge the cylinder, increasing pressure above atmospheric, this can be done with the blower or blower and turbocharger. If the timing has the valves closing after the ports it won't be supercharged even if you have turbos on it.
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  #34  
Old 08-01-2012, 10:30:11 PM
Seafarer12 Seafarer12 is offline
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Default Re: Company Selling Detroit 2-71 Generators

Quote:
Originally Posted by John Newman, Jr. View Post
"... You know they at least double the price they pay for them..."

They also had to buy a large quantity of them to get that price.
Maybe maybe not. Just depends on how they bought then. A plant I use to work at had about 8 old military gen sets bought at auction for next to nothing. They stuck them out back and pretty much let them rot. I would have loved to have had one of the smaller ones. They were skid mounted and enclosed.
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  #35  
Old 08-02-2012, 07:32:42 AM
armandh armandh is offline
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Default Re: Company Selling Detroit 2-71 Generators

a naturally aspirated 2 cycle is not really.
the typical chain saw or dirt bike, all without a blower or turbo
uses the crankcase compression to push the air/fuel/oil in to the cylinder

when I think of naturally aspirated
I think of a 4 cycle engine

Last edited by armandh; 08-02-2012 at 07:43:09 AM.
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  #36  
Old 08-02-2012, 10:50:08 PM
Seafarer12 Seafarer12 is offline
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Default Re: Company Selling Detroit 2-71 Generators

Quote:
Originally Posted by J.B. Castagnos View Post
A regular ported 2 cycle engine can't be supercharged, the intake ports close before the exhaust and therefore the cylinder pressure can't be increased.
You can force air in there. I have seen a Yamaha Banshee drag quad running turbos. It takes work but it can be done.

As far as detroits and other large 2 stroke diesels they are prety much all supercharged, at least everyone I have seen.

---------- Post added at 09:50 PM ---------- Previous post was at 09:47 PM ----------

I should have said blower not supercharged
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  #37  
Old 08-02-2012, 11:27:31 PM
J.B. Castagnos J.B. Castagnos is offline
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Default Re: Company Selling Detroit 2-71 Generators

You can force air through a ported two cycle and increase output but it won't be supercharged. Supercharged is raising the cylinder pressure above atmospheric, it won't happen on a regular two stroke, the intake ports close before the exhaust. On a Detroit the blower is necessary to scavenge the cylinder.
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  #38  
Old 08-03-2012, 11:19:12 AM
miltruck miltruck is offline
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Default Re: Company Selling Detroit 2-71 Generators

Go to youtube and view "how a 2 cycle diesel works" there are a number of good clips.

Back to 2-71 gen sets:

We have both a 2-53 20 kw 1,800 rpm set and a 2-71 30 kw 1,800 rpm set and for long term use at home, the 2-53 would be the better unit. The 2-71 is loud and does vibrate more and fuel use is higher for the same load. At 1,200 rpm it must be somewhat better, but you still have the weight problem.

Any of these old school gen sets should last longer than the rest of us if being used for standby power. I expect a 1,200 rpm set to last at least 20,000 hours if run correctly. The 1,800 rpm sets should go at least 15,000 hours too. Thats almost 2 years of round the clock running!
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  #39  
Old 08-04-2012, 07:59:55 AM
Pauls Welding Minnesota Pauls Welding Minnesota is offline
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Default Re: Company Selling Detroit 2-71 Generators

The copies of instructions and specs that come with my 2-71 generator show a expected run time of 40,000 hrs before a top end overhaul, says nothing about the bottom end.
The maintenence was probably pretty hit and miss on these units as the oil pan holds an extra 2 1/2 gallons of oil.
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  #40  
Old 08-04-2012, 12:25:20 PM
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Talking Re: Company Selling Detroit 2-71 Generators

You would be VERY Lucky to half that, from a 2-71, when it is run at rated load... Just say'en.... Sounds like a Salesman's Pitch.....
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