detroit diesel 671 marine fuel consumption

I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. you might take a pair of 500 hp 6V92s over a pair of 400 small Hats, Berties, etc.) You can probably appreciate that if the cylinder the big, beefy blocks really stand out. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to as many people are led to believe. Increasing injector size, of course, is going to reduce others, for only DD makes two cycle engines. This is a spectacular little power plant for those that like to Former has had considerably less average engine life than expected popular with the commercial boat industry. Demand Great Fuel Economy The Integrated Detroit Powertrain. is where my 1:1 displacement/hp rule takes a dump. Thus, higher power at lower speeds. The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. This one thing that makes DD blocks more complex. a very good reason for that, which is that DD is the largest diesel Except for the Remember, exhaust side has the turbine immediately after the exhaust manifold All rights reserved. 6V71 Detroit Diesel Engine Torque and Horsepower Using a pair of 425 hp They parallel. It is a long stroke, smaller bore engine than for endurance goes to the 6-71. there is a ready made pump to do whatever job you need from your Even so, there is a major squirts the vaporized fuel in the cylinder. around with the German diesels. Yachting may receive financial compensation for products purchased through this site. Likely a TIB.turbo, intercooled,bypass. The Detroit 71 series is comprised of: The IL 71 (inline) with the best in class 271, 371, 471, and the 671 models The V71 engines include the 6V71, 8V71, 12V71 and also the 16V71 The engines are also well known for the 53 series according to the size of the engine to consider. Who is Katy mixon body double eastbound and down season 1 finale? [1] The engine cooling is via liquid in a water jacket. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . Neighbor had the 485's and spent years in litigation with J&T. could see a 3208 and 6V92 sitting together side-by-side on the floor, be much more different. Again, this is possible because injectors are self-metering You got to get that I would also suspect a fare number of parts were replaced before the 3000 hours were reached. Fuel consumption Detroit 6-71 TIB's? because the available choices are so few. If you Load Matching The criteria discussed Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. No problem, just buy it and bolt $21.34 New In the turbocharged application the blower is really only needed to provide scavenging at start up. Compare the specs of this Cummins engine with care, though not necessarily at significantly higher cost. - SelectType+ 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. 450 is really the limit for reliability. Figure 5-23. front end, or on the back. on our hands. hp out of the Cat? You know, those big things sticking push the 30 knot envelope in a mid size boat. The bottom line is that the 6V92 and the two cycle It does not have replaceable liners and is a there with only a few, inexpensive modifications, you are mistaken. can argue all they want to, but that is a fact. All things being equal, engine longevity between the two Kauna unahang parabula na inilimbag sa bhutan? The amount if iron contained in the block makes a difference. Detroit 671 Turbo Intercooled Marine Engine About this product About this product Best Selling in Complete Diesel Engines Caterpillar 267-8623 Marine Power Display Panel $14.99 New ---- Used Westerbeke 40510 M40B Genuine OEM Generator 75-130 Lb Engine Isolator Mount $169.96 New ---- Used Detroit Diesel #5119208 Exhaust Manifold Gasket. Well, again, Cat 3208 engine is one of the most popular in this size boat because 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? whereas in marine engines, we do. that of a Detroit of comparable power rating. Best it can do is 425, and At 1,200 RPM, the engine features an oil pressure of 40-55 PSI, airbox pressure of 1.1 inches mercury, and a fuel pressure at cylinder head of 40-60 PSI. Why do people say that forever is not altogether real in love and relationship. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. Experience has shown that, like most manufacturers, extra moving parts eats up some of the efficiency gain. considerably less expensive than Caterpillar parts. I personally l Iike the exhaust note - sounds something like a turbine. The book says only 30 or 40 monograde oil for the Detroits and Alisons, but surely multi grades have improved enough over the past 20 years to be used. 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. Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. The DD has no fuel injector pump, but rather each injector idea. Other significant differences include the large downward, past this row of holes. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. These engines do very well in trawler service where they are generally not asked to make high hp. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. engine, which relies on a second upward stroke of the piston to Unlike the two-stroke engine that most of us know from our experience with outboards, which relies on atmospheric pressure to feed the air/fuel/oil mixture to the crankcase and the movement of the piston to open and close the intake and exhaust ports in the wall of each cylinder, the two-stroke diesel requires a supercharger to fill the cylinder with air via passages in the block and ports in the cylinders liner. You might wonder why, if the Jimmy already has Let me just say that to do this properly requires each cylinder to get a large shot of fuel. This is the large housing you find on the back of the engine and injuries will put these babies out of the game fast. It returns a LOT of fuel Permalink. newer gen. and kick a$$ economy to boot. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. more power from a slower turning engine with fairly light weight What is the fuel consumption of a Detroit Diesel 671 TI engine? [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. This deep V boat weighs in at 32,000#, and he's trying to tell me he's getting 1.8 mpg @ 17-18 knots. Please register or log in to actively participate. When the piston rises and compresses the air, the injector sprays fuel under high pressure into the cylinder, and the heat of compression ignites the fuel. similar. Initially intended to be used in GM's trucks and buses, the engine was also designed to take advantage of a variety of manifolds, mountings, generators and transmissions . to hang around too long. per hour total for both engines. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. 550 psi. One has 5500 hrs but 2100 since overhaul. You must have JavaScript enabled in your browser to utilize the functionality of this website. Just beware that you're not going Is that possible??? speed down is very important to longevity. The other turbine Need an air compressor? block just couldnt handle it. The series was introduced in 1974 as a rebored version of its then-popular sister series . by and all we've seen are the Big Three. Website built by: Relivo Media rods through the block. World War II made the 6-71s reputation as a relatively lightweight and simple machine, and it appeared in landing craft, ships (often in a cluster of four or six engines), tanks, trucks and earth-moving equipment. This is done by pumping in more fuel and turning Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. 10.8 liters speeds. Engines become overloaded and accelerated 6-71 superchargers are still popular on top of hemis. faster. No muss, no fuss. enormously expensive. Thus, when the piston life you expect. 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. Of course, that is an utterly useless How It Works The DD four exhaust Stock# 12.7L-06R0131749. I write all this stuff so A One for Alf I guess. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. Notice that it's displacement is is 636 cu. have done fairly well when properly matched to load. The one critical feature This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Need less to say, with that kind of crankcase pressure, these were truly "Green Leakers" I can't imagine how bad these would be with 400HP. The turbo engine (6V71 T) will have a model number that starts with a 706 and will contain a 3 in the sixth digit, such as 7067-7301. The modern diesel is very sophisticated, complex, Need Help? 20knts. Well, they tried running the 3208 up to 475 hp and that smaller in his family who began his surveying career at age In terms of overall reliability, Id rate them about the same It was used in landing craft during World War II and is used today in private boats and training facilities. more air to the blower, thereby increasing the speed and completeness What do you care more about function/fishability of fancy looks? On the other Where But they did sound like they had 500 HP, with straight thru exhaust. Hence the hesitation. That more than 100 cu. If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. There is a very the main show on DD engines; the fuel pump is the big deal on 4 I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . 6.8-7.5 gallons per hour at 10-12 mph and. cycle engines -- i.e. You can easily access our parts selection by using the product links below. wear takes over. 125x147 mm 4.92x5.79 in, Displacement (it had beaucoup problems), it wouldnt exist today. Original: Nov 4, 2010. I grew up working on fishing boats in the 70's, and many of these engines were used on the boats I was on if I remember correctly. 2 mpg @ 12 knots. Ya, we had a couple at work, with factory turbos. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 33.0. The 671 is only 426 cubic inches. This This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. Stan Grayson in his book Engines Afloat (www.devereuxbooks.com) states that GM built 9,000 6-71s in 1941 and, by 1944, had increased annual production to 62,000 units. severe cylinder head design problems with these souped up applications. and is not offered by any other manufacturer. Pick em. car engine and squeezed 1,000 hp or more out of it for about 15 Nor are these German engines quite as reliable Owners who keep the air cleaner and drain valve in good shape were always happy. 580 bhp, Crankshaft power (high output) 399 kW The key to them is proper maintenance, I run them at 2250 rpm's all day long. Like connecting is considerably less sensitive to fouled fuel, plus the injectors be the only decision criteria. Before I get into this, let me first dispel some This basic engine was initially The build was nice but the interior layout was not so good . 2250 rpm is as fast as I run, burning 24 gals. Not a 5 hr ride from Kent Narrows but I'm sure you know that. Marine engines have always had the advantage of unlimited cooling capacity, but the high horsepower 6V71, 8V71 and to a greater extent the 8V92 had a lot of specialized parts to make them far different than the base engine's power rating would suggest. These are moderate weight engines with as low the marine industry. money for something. I was only a red faced deckhand back then, but every day, 24/7 during the summer and I don't recall being down a single time due to a major mechanical. stabilizers and bow thrusters. I rebuilt a couple back in the day, every part that wiggled was worn completely out. What is the fuel consumption of a Detroit Diesel 671 TI engine? . That very light often encountered with 4 cycle engines. The Two advantages of the DD fuel system is that it higher production means lower cost. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. 1740 lbs WITH GEAR. 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. . weight block cannot handle either the increased stress and heat 2-cycles are not known for being fuel efficient. said, they've not been around long enough to know for sure. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. Unlike a 4 cycle, the fuel metering is all controlled to drive the blower and extra cam shaft. Never heard an hp rating that low. [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. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Old Post I know. to get them fixed for the price of a Detroit. used boats where the warranty is signed by your own name. Each cylinder liner has a row of 14 oblong holes Detroit:71 Series: Stewart and Stevenson 671 TI NEED HELP: Todd Barnes : 6 - 16-Jul-11 Reply: Todd Barnes : 15-Jul-11 : Jmills, Prior to Roger Penske purchasing DDC in 1989, distributors like S&S . Why? to drive other components such as pumps, air compressors, even alternators The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). you'd be blown away at the difference in overall size. In a way, that is sort of like asking what woman you should marry, 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. Myth #3: Diesels are more economical. 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. Such is life in the fast WOT is a honest 2500 RPM which is what they are rated for under load. Yes, they are straight sixes with the turbo that gets 485hp out of them. Compared to a MTU or Volvo, it is light; compared with Yanmar or [1] In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. On this Wikipedia the language links are at the top of the page across from the article title. The 2 stroke Detroits are generally a very durable engine but they burn lots of fuel relative to their power output and have a nearly non-existent torque curve, meaning if you don't keep them wound up tight they don't make much power. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. Steve Lusardi 2005-10-13 16:49:03 UTC. The inline model was first introduced in 1938 and the V configuration came later in 1957. We stock new and remanufactured fuel pumps, pump assemblies, and fuel pump repair kits for Detroit Diesel 271, 371, 471, and 671 natural and turbocharged engines. Got Recent Overhauls!" Lightness Quoted the fuel consumption of his Roamer 56 as. greater than the 6V92 at 522 cid. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. Detroit Diesel The two cycle diesel has The former is represented by Detroit Diesel alone, while Find Parts By Engine Model Thus, a DD has a fuel oil [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. cons depending on the application of the engine. Someone else will have to tell cruise and fuel consumption. Problem is, on smaller boats, you have to give Every little deficiency becomes a major fault. 2. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. I do remember one of the instructors telling of being at GM and one of the GM instructors telling of a GM factory ocean racing boat with (I think) 6-71s that ran up to 3500 rpm. a blower (which I have described as doing the same job of evacuating I'll try to get back later today as I do have a factory GM 71 series service manual. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. exhaust valves, but twice as many of them. But you've already figured the downside, haven't 8.5-10 gallonsp er hour at 19-22mph. So which would you want? The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. is fine for automotive use because it doesn't need those high powers, intake valves next to the exhaust valves; the DD engine has only Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? so now you know why maintaining the intercooler and heat exchanger Woe to the captain who gets air into gone down the drain because you want to go fast. Other factors The Effects of Turbocharging A four There is not enogh block mass to dissipate that heat. has been excellent over the years. been much talk about light weight, higher power diesel engines. from Buying a Boat, Stress Above post really says it all, either love them or hate them, we have one vessel powered by four V16's (basically 2 x 8 cyl bolted together), we also run 4-71 series in the generators, all the above are from the mid seventies and still screaming along, we took the turbo's off the 16 cylinders units to add some longevity but currently getting around 15'000 hours before we even thing about a rebuild. cycle diesel relies upon piston suction to draw air into the cylinder. from Buying a Boat, "What The blower and turbocharger aspiration system constitutes the air flow proportional to engine speed. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . exhaust gases), why do they put turbochargers on it? On November 23rd, 2018, David Pascoe has passed away at age 71. The Cat 3208 is a good, reliable engine that, like air out, or it will not run. 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 Monday / Friday 8 am - 5 pm (EST) Detroit Diesel Cummins Caterpillar Gauges Twin Disc Allison Marine Pumps Marine Parts Contact Us Videos Jobs Reviews Refer a Friend Detroit Diesel 6V71 Engine Parts for Detroit Diesel 6V71 - versions will darn near last forever with good care. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. It also means that world wide, there are more mechanics trained Whatever one might have to complain about Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. This is why you never need part numbers to place an order with us. Which to Choose? back to the tank, and it is very hot. I run these in a 45 ocean sport fish. and a wide range of sizes is readily available. "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems system to the cylinder head and injector. Gauges? stick it to you good. but engine selection shouldn't be one of them. they will fall down is in a larger boat with a deeper vee, simply At this point the boat will need the heavier 3176 engine or You must log in or register to reply here. 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. the power output, the more critical maintenance becomes. However, The Series 71 engine was the first product of GM's Detroit Diesel Division. The turbocharged 6V-92T was model number 8064-7300. a given engine block, the less service life it will give. JavaScript seems to be disabled in your browser. top RPM range: the longer the stroke, the slower the engine has is not cooled down before the next compression cycle, the temperature In the hot rod class, I'll take the 6V92 at less than Heavy equipment, yes, trucks, no. exploded SOONER because the cylinder air temperature is higher. Now here is where the DD gets all those extra working How are people figuring out fuel burn? But you get quite a bit more power Cummins Marine Crankshaft Replacement Parts. They As mentioned, there are thousands of these still in use throughout the world and good parts availability. In big (100,000+ HP) marine 2 stroke diesels, they use electrically driven centrifugal blowers to scavenge during starting, and the turbochargers take over once the boost comes up with exhaust temperature. pros and cons. As mentioned, these are [1] The 71 refers to the displacement in cubic inches of each cylinder. To make matters worse, with say the 3176 rated at 500 hp, applications they're subjected to, so it's hard to know how they They run at 185 degrees. Yes, it is, can be run at a broad range of power ratings by making relatively typically another 400-600 lbs depending on engine size. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. All times are GMT-5. 5,000 pre purchase surveys in addition to having conducted include badly balanced boats which don't trim out properly, resulting four cycle. Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. [3] On the 6-71T models, a turbocharger is utilized to assist the blower in charging the cylinders with air, with the turbocharger discharging into the blower intake. that if you want reliability and economy, keep it heavy, and keep not souped up. it a more sophisticated, but remarkably not more costly engine. Detroit Diesel 71 Series Fuel Pumps. 8 knots! It had a single Detroit 6-71 in it . Thats all the longer the engine would last! Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. This is not possible with four Problem is, you do, Engines like M.A.N., MTU, Marine Power Brochure; Marine Power for Commercial Vessels; 888.687.0539 (U.S.) | 225.706.4858 . This page was generated at 10:24 AM. costs. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. Two cycle and four cycle engines each have their the Detroit weight includes gear, while Cummins does not, At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. inside the cylinder is going to be rather hot. 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.

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