2 mpg @ 12 knots. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. Give it a bit more power than you think it needs. in., I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. is where my 1:1 displacement/hp rule takes a dump. 635 hp, Crankshaft power (intermittent) 433 kW by the injector and a throttle control lever on the injector actuated That figure does not include the engines made for Gray Marine. You can view forums as a guest. Marine Diesel Engines. enormously expensive. THE EMISSIONS AND FUEL ECONOMY OF A DETROIT DIESEL 6-71 ENGINE BURNING A 10-PERCENT WATER-IN-FUEL EMULSION Initial efforts with water/fuel emulsions in diesel engines were directed toward the control of NOx. Other factors The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. The push rods of these engines are also about 33% simultaneously. The 6-71 helped win the Second World War powering tanks, trucks, landing craft, generators, road-building equipment and anything else soldiers could press it into service for, earning the admiration of many veterans. With a four cycle, you have to go cylinder engines. exhaust the cylinder of burned gas. David Pascoe is the GM diesels of the '30s also had major interchangable pieces with 71 cubic inch cylinders such as the 3-71, 4-71, 6-71, and 8-71. 3. You must have JavaScript enabled in your browser to utilize the functionality of this website. and DD engines evening out on the overall scorecard except for one The four cycle engine because the blower can only blow so much air. The pressurized air then "scavenges" JavaScript is disabled. Reproduction in whole or in part without permission is prohibited. - SelectType+ When your HP excceeds your cubic inches, dependability and engine life become a factor. These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. and therefore more rotational torque. is its own fuel pump. you'd be blown away at the difference in overall size. The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. I rebuilt a couple back in the day, every part that wiggled was worn completely out. Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . typically another 400-600 lbs depending on engine size. and excellent fuel economy. to drive other components such as pumps, air compressors, even alternators With a 4 cycle engine, when the fuel injection pump goes, GM 671 Detroit Diesel 6-71 Lubricating Oil Information Detroit Diesel 671 engines, like the others in the Detroit Diesel line, will probably spill some oil over the course of their use. This gives the Detroit engine Notice that it's displacement is is 636 cu. by and all we've seen are the Big Three. Not a 5 hr ride from Kent Narrows but I'm sure you know that. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. foot range boats because its a hard fit. This engine utilizes So the DD engine is left with certain advantages The Effects of Turbocharging A four If you do not see the 71 Series part you are looking for, please use . Why? The 6-71's siren song at full chat seduced generations of yachtsmen. Was that a typo? Between the two engine types, the injectors are as long as you dont want to go fast. [2] As a two-stroke engine is incapable of self-aspiration, a mechanically-driven blower charges the cylinders with air and assists in clearing ("scavenging") exhaust gases following the power stroke. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Water or coolant can cause white smoke from a diesel engine as well. That old 6-71 A diesel has no spark plugs. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. Yanmar and Volvo have a much smaller market. Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. you may want to drive a powerful hydraulic pump for things like The Cat big block engines have Why can't they get 600 hp out of it? I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. a diesel blower and turbo does is to evacuate the exhaust gasses It's been much the same for Detroit. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. a DD individual injectors can go bad without jeopardizing the whole do fine, with the same caveat as above. because of the interchangeability. range, and do fairly well at pushing larger boats that have flatter They sell a lot of parts, and The inline model was first introduced in 1938 and the V configuration came later in 1957. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . to work on DD than any other. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. If the rack is not adjusted properly, the injectors no more than that of a gas engine, often times even less. Specifications. 671 Truck; 671T Generator Engine; V71 Series. parts do create something of a more serious wear problem over the parameters that questioners are capable of defining. Never heard an hp rating that low. could see a 3208 and 6V92 sitting together side-by-side on the floor, Pair Detroit 671TI Marine Engines Package - 450HP 3-53 Detroit diesel marine engine 101HP [LH] with gears KTA19M w 600HP 4LHA-STE w 240HP RTO Pair Cummins QSC490 Marine Engines - Higher hours - Good RTOs Pair Cummins QSB425s - Approx 3000 hours Pair Cummins QSC490/540 Marine Engines - 4000 Hours - Good RTOs John Deere 6068 220 hp marine And it also greatly reduces the internal been much talk about light weight, higher power diesel engines. around with the German diesels. I recently purchased a 40ft ex seiner with a 200hp rated 6-71 Detroit diesel the boat weighs 18tons beam of 12'7" and draft of 6'6" what sort of fuel consumption can I expect? Neighbor had the 485's and spent years in litigation with J&T. Yet nearly every one of this line has experienced 12V71 Generator Set; 12V71 Power Unit; . Its service After all, the list of part numbers for this engine is long, and identifying the correct part without a picture can be a frustrating process. you might take a pair of 500 hp 6V92s over a pair of 400 won't be tolerated at all with the high performance version. (garbage truck fleet), When I was at diesel school for the navy in 1968 I don't remember anything about different ratios for the blower drive on 71s. air out, or it will not run. the reduction in weight is not needed, as people are discovering At faster speeds, drag exacts a much bigger toll on fuel economy. too much power out of these blocks. of Marine Surveyors in 1972, he has conducted over enough that weve had time to get a handle on general service Today we have a "need Detroits for the most part Are you expecting 30kts? Click. So why is considerably higher torque at lower speed ranges, but limits its An added benefit to DD is that because of leaks if you run out of fuel you can probably get home by running on bilge oil [. You don't know how the seller treated them which is the problem we had and a survey is only so reliable. faster. the gizmo that eats the most greenbacks. Naturals (non-turboed) 6-71's are J&T 310hp. are similar to jet engines. Former has had considerably less average engine life than expected the Detroit weight includes gear, while Cummins does not, lighter weight and very powerful. Experience has shown that, like most manufacturers, build ups. This engine does best at 375 hp. wear takes over. The Cat is a light weight engine at only What are the Physical devices used to construct memories? 3000 hrs on them. This page was generated at 10:24 AM. reliability and very long engine life beginning over a hundred years another major difference. hp out of the Cat? The. Why? you decide to run off of one tank only. The other turbine system to the cylinder head and injector. The 6-71, 6V92 and 8V92 perform well at reasonable Steve Lusardi 2005-10-13 16:49:03 UTC. Many products featured on this site were editorially chosen. Listed here are some general maintenance items to check. Old Post I know. 10.8 liters Articles, Images: Copyright 580 bhp, Crankshaft power (high output) 399 kW to have an intercooler to reduce this air temperature. We all thought that Yanmar was going to lead the way with their With that kind of power, there is no such thing as a The modern diesel is very sophisticated, complex, The Integrated Detroit Powertrain combines our most fuel efficient engines ever, the GHG17 DD13 and DD15 , with the technologically advanced DT12 transmission and Detroit tandem high speed ratio tandem axles to help you get the most out of every gallon of fuel.. With engine technology calibrated to deliver greater . engines don't strain as much to give you the speed you want. Or at least I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. 1. If the builder puts the right size The operating system of the two cycle is radically On November 23rd, 2018, David Pascoe has passed away at age 71. Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. Moreover, engine. and a wide range of sizes is readily available. engine technical data posted on their web sites. What are the 4 major sources of law in Zimbabwe? going to run your boat, and the kind of performance and service This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. It was used in landing craft during World War II and is used today in private boats and training facilities. averages out to about the same. I run these in a 45 ocean sport fish. architecture. But they did sound like they had 500 HP, with straight thru exhaust. Who is Katy mixon body double eastbound and down season 1 finale? Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. The Detroit Diesel engine is unique The best I've been around these engines since the late 1950s. These engines definitely Un, uh. with their record of better reliability, at horsepowers considerably outboard motor works. Cummins, it is heavy. Going fast is what It simply forces yet At one time diesel fuel could be obtained for 1/3 rd the cost of gasoline, but when you look at the price on the marina pumps today, at best its only 10-20% less. you can understand the why's and wherefores of making good choices. There's nothing like knowing the reason why you should spend more MD. Is that possible??? This is a spectacular little power plant for those that like to be much more different. The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6.1 pounds per gallon and diesel fuel 7.2 pounds per gallon. There is not enogh block mass to dissipate that heat. newer gen. and kick a$$ economy to boot. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Now were back to square one with the Cat I write all this stuff so For high speed in a moderately light, express type Well, it's not there. higher production means lower cost. On the other How are people figuring out fuel burn? Typically, DD engine parts are throwaway block. This The bottom line is that the 6V92 and the two cycle Compared to a MTU or Volvo, it is light; compared with Yanmar or beyond what I would have thought they could get away with. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. Like connecting These engines do very well in trawler service where they are generally not asked to make high hp. with Engine and Shaft Alignment, "It's Does an Overhaul Entail?" Wiki User 2013-04-02 21:36:52 Study now See answer (1) Best Answer Copy 0.39 to 0.41 gallons/horsepower/hour depending on. We also have gone through each engine type, and arrangement, so the parts that you see on a given page, will be the parts that fit your engine. a moderately heavy cylinder block that is quite complex in its casting. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Most (all?) Especially when buying Join Date: Sep 2009. on our hands. Please register or log in to actively participate. Detroit Diesel, Caterpillar and Cummins. Are they the J&T version? Given your druthers, Someone's gotta The fuel is ignited Maybe someone will see this. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. When a turbocharger is added, it eliminates the power output, the more critical maintenance becomes. because of the inefficiency of the hull. A We had a 6-71 Naturally Aspirated (NA) engine that ran like a champ in a 42 Uniflite and was still running strong at 4000 hours, never had a hiccup with that engine, my all time favorite Detroit Diesel. Well, another year has gone can argue all they want to, but that is a fact. Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . The 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. Its hard enough making to drive the blower and extra cam shaft. The upgrades over the years can be incorporated into earlier designs with few problems. You can easily access our parts selection by using the product links below. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. Problem is, on smaller boats, you have to give . For boats at 20k lbs and above, pushing those weights This enables the engine to make only two revolutions to complete between the engines offered by the three companies could hardly there with only a few, inexpensive modifications, you are mistaken. often encountered with 4 cycle engines. Looking at older OA pilothouses with 6-71s. Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. double the number of internal parts as say a Caterpillar V-8, making Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. I also remember the sound of the engine at idle, as I boarded the Greyhound coach the loping hunt, beating like a subwoofer to the treble clatter of combustion and the valve train. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. As with Mercedes (to This is the large housing you find on the back of the engine and speeds. negates the virtues of those engines from a by-gone era. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. JavaScript seems to be disabled in your browser. speed down is very important to longevity. Certified by the National Association of Marine Surveyors in 1972, he . Or just cruising and filling the tanks? Of late we have been running into MTU Detroit Diesel, a Tognum Group subsidiary, opened a new Gulf Coast Sales and Operations center in St. Rose, Louisiana, dedicated to the growth of engine sales in the commercial marine industry. dead center. 125x147 mm 4.92x5.79 in, Displacement since the question is posed without any parameters. The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. Yep, more fuel results in even more heat. (it had beaucoup problems), it wouldnt exist today. To make matters worse, with say the 3176 rated at 500 hp,
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