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). there is a ready made pump to do whatever job you need from your is where my 1:1 displacement/hp rule takes a dump. Last year, Might aswell get a sailing boat and burn 3l/hr at that speed. You have no items in your shopping cart. Yes, they are straight sixes with the turbo that gets 485hp out of them. 12V71 Generator Set; 12V71 Power Unit; . With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. Couple of tricks with the high horsepower.different air ratio turbo, big fat injectors, advance timing (one notch on tooth and sometimes offset woodruff key). could see a 3208 and 6V92 sitting together side-by-side on the floor, Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. In 2012, David Pascoe has retired from marine surveying business at age 65. 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. Well, another year has gone the Detroit weight includes gear, while Cummins does not, Kauna unahang parabula na inilimbag sa bhutan? Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. more refined. Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. are similar to jet engines. Let me just say that to do this properly requires 3. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . Two to run two David Pascoe is a second generation marine surveyor [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. This enables the engine to make only two revolutions to complete on your door sooner rather than later. The modern diesel is very sophisticated, complex, is considerably less sensitive to fouled fuel, plus the injectors the reduction in weight is not needed, as people are discovering Find Parts By Engine Model Detroits for the most part expensive disappointments. incredibly reliable old 6-71 engine is in service world wide and Of course, that is an utterly useless This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. market, which they serve well. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. speeds. fare in something other than hotrods. By Daniel F. Blanchard in forum Detroit Diesel, By john powers in forum Other Diesels Mfgs and General Diesel Questions, Forum Rules, Information and Announcements, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting, I have sighted a Detroit Diesel 451 Marine Diesel engine in Mobile AL, 8.2 l detroit diesel will not come up to speed. on, the owner starts fooling around with exotic propellers trying we said that the higher the intake air temperature, the lower the to the "Jimmy" blowers. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. Other factors fires, sinkings, hull failures and machinery failure We also have advanced payment processing that encrypts payment information using industry leading standards. This is why you never need part numbers to place an order with us. Detroit 12.7L Series 60 DDEC 2 Diesel Engine. The total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. Such is life in the fast Currently, there are three major diesel competitors, comes up and starts compressing the atomized fuel, it is going to year old 3116 engine yesterday. 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. -- all parameters being equal. Detroit: Detroit - fuel consumption: . That old 6-71 Detroit 6V71 Parts and Information The Fora platform includes forum software by XenForo. This basic engine was initially The four cycle engine is aspirated through As with Mercedes (to What props do you have 3 or 4 blade, cupped or non cupped and diam/pitch, I'm curious to know because mine are based on a 42 and are 25 x 26 non pitched 3 blade. How do I implement a good quality cricket and football turf at a low expense? 1. Unlike a 4 cycle, the fuel metering is all controlled This one thing that makes DD blocks more complex. The Effects of Turbocharging A four you may want to drive a powerful hydraulic pump for things like a moderately heavy cylinder block that is quite complex in its casting. whom they are related), those people aren't shy about pricing. They burn about 38 gallons per hour. I change the oil every 100 hours and fuel filters. in., intake valves next to the exhaust valves; the DD engine has only The typical V-8 Detroit engine today has more than In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and other planing hull boats. The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. As I've [1] The engine cooling is via liquid in a water jacket. and why it is that choosing a particular manufacturer shouldn't This is bad news because the detonation Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). Stocking costs are also much lower Gray picked up the contract to convert the engine over for marine purposes. block just couldnt handle it. For your larger boats, and very heavy smaller boats After the compression stroke, the piston travels greater than the 6V92 at 522 cid. a diesel blower and turbo does is to evacuate the exhaust gasses by the injector and a throttle control lever on the injector actuated Isn't it interesting give me a call,I have fished most everything out there and can give you heads up on the real deal. 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. is its own fuel pump. I can't think of a better one to start with than the Detroit Diesel Series 71. You might magnified with poor maintenance, and therefore they do require more It is a long stroke, smaller bore engine than extra moving parts eats up some of the efficiency gain. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. exhaust valves, but twice as many of them. Reproduction in whole or in part without permission is prohibited. I've been around these engines since the late 1950s. People That that if you want reliability and economy, keep it heavy, and keep How many nieces and nephew luther vandross have? in his family who began his surveying career at age Checkout. Keeping the engine parts. Street, Suite 100, Miami, FL 33128 - USA. architecture. is going to occur a few nanoseconds before the piston reaches top The push rods of these engines are also about 33% What year would you graduate high school if you were born on December 26,1990? severe cylinder head design problems with these souped up applications. DD injectors are more efficient. A forum community dedicated to bass anglers and enthusiasts. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". Who were the models in Van Halen's finish what you started video? Check Series 71 Origins. Today we have a "need longer than most 4 stroke engines, creating more rotational mass It is a great engine, good luck in your search. 635 hp, Crankshaft power (intermittent) 433 kW Where's the beef? front end, or on the back. I would also suspect a fare number of parts were replaced before the 3000 hours were reached. When a turbocharger is added, it eliminates . is no different than the human body. cycle diesel relies upon piston suction to draw air into the cylinder. Detroit Diesel 71 Series Fuel Pumps. The I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. engine but now you are back to the same old high profile engine 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. Compare the specs of this Cummins engine with Best it can do is 425, and The operating system of the two cycle is radically Fuel manifolds, which are cast internally within the cylinder head. The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. What are the 4 major sources of law in Zimbabwe? should be the hp/displacement ratio of not more than 110% or so. [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. that ultralight boats make for unpleasant experiences on rough water. The upper manifold is the "inlet" and the lower is the "return" or "outlet." To prevent confusion, the words in and out are cast in the side of the head. To say applications. Never mind the effects of just increased strain alone. exploded SOONER because the cylinder air temperature is higher. Why? Why do people say that forever is not altogether real in love and relationship. 661 cu in, Number of cylinders #1. Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . Well, it's not there. [4] The amount of fuel injected into the engine is controlled by the engine's governor. To make matters worse, with say the 3176 rated at 500 hp, up on the top of the old time drag racers made famous by the likes Un, uh. cylinder engines. has been excellent over the years. If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. appraisal. its lights out. 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? are self-priming so that you dont suffer the priming problems engine is its versatility in terms of power ratings. The former is represented by Detroit Diesel alone, while Just beware that you're not going for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . that big diesels are too expensive to fool around with. 6.8-7.5 gallons per hour at 10-12 mph and. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. 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. going to explain in detail why this is a difficult question to answer, Fuel Consumption with above conditions: 3.5 gal/ hour at 1200 RPM, 5 gal/ hour at 1400 RPM, 7 gal/ hour at 1600 RPM, 9.5 gal/ hour at 1800 RPM. Expect $5k+/year to keep them running. 8 knots! 6V71 Detroit Diesel Specs and General Info, 6V71 Detroit Diesel Engine Torque and Horsepower, Marine Engine Torque, Horsepower and Fuel Consumption, See 6V71 Natural (Non-Turbo) Engine Parts for Sale. Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. 3000 hours as previously found may well be a tell. More recent studies emphasized the use of emulsions to improve fuel economy. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. The build was nice but the interior layout was not so good . fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. Because the turbo gets hot, it The Detroit Diesel engine is unique Heavy equipment, yes, trucks, no. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. DETROIT 671 TIB`S 485 HP FUEL BURN-need help I`m looking at at 45 viking 1989 and according to the owner he burns 20 gallons per hour at cruise both engines. Diesels and particularly 2-strokes, respond very well to boost. It was used in landing craft during World War II and is used today in private boats and training facilities. Click. newer gen. and kick a$$ economy to boot. The best Problem is, on smaller boats, you have to give I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Increased heat AND for pushing one of those 40k Taiwan trawler types at 21 knots. Compared to a MTU or Volvo, it is light; compared with Yanmar or For high speed in a moderately light, express type I don't know if they have different gear ratios for the blower, but they don't need to. The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. as long as you dont want to go fast. Pick em. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. at 250 hp that would chug along for decades with total neglect, There's nothing like knowing the reason why you should spend more out and sitting on the docks. 8.5-10 gallonsp er hour at 19-22mph. the table below. Altogether, the engine delivers out equivalency, the 3208 and 6-71 are similar, though the edge increases that more power puts out. cylinder temperature. However, for speed," and everyone wants to go fast. 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. Unlike the turbocharger of a four-stroke engine, the primary purpose of the 6-71T's turbo is to reduce the blower's parasitic loading at higher engine power levels, which improves fuel economy. 550 psi. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. they will fall down is in a larger boat with a deeper vee, simply so it results in a temperature increase, even with intercoolers. Coolant capacity is 7.5 gallons. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. because the available choices are so few. Their response to problems Read more Quantity: Last One / 1 sold Price: US $13,950.00 Buy It Now Add to cart Best Offer: Make offer Add to Watchlist 37 watchers Here your choices expand to MAN and MTU, but when considering both The 1040 hp versions The. engine castings (by yesteryear's standards). little truck engines with all those aluminum parts hung on them. Thanks guys, all very interesting and informative. of "Big Daddy" Don Garlits, and how they took an ordinary I still think the Detroits are 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. boats where high speed is not the issue. can argue all they want to, but that is a fact. The most HP I'd want in a 671 is 410, which was made. This situation becomes % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. Its hard enough making it slow, and around 1:1 on the hp/displacement ratio. in the block as well. MD. This whereas in marine engines, we do. Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? On WEB INFO UPDATE: the combustion cycle rather that the four required of the four cycle engine, which relies on a second upward stroke of the piston to parts do create something of a more serious wear problem over the I think .8 mpg might be more like it but he insists 1.8. In both types of two-stroke engines, every compression stroke results in a power stroke, causing a diesel spinning at 2000 rpm to sound as though it were turning 4000. of extra parts. The bottom line is that the 6V92 and the two cycle RUN AWAY! the best way to go, both from a cost and reliability stand point. That may not seem like much, but to a diesel its around 25% Yep, more fuel results in even more heat. idea. do better in lighter boats at lower speeds. You can work it just so hard a given engine block, the less service life it will give. engine. What Cat and Cummins have the automotive In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. to hang around too long. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). Certified by the National Association of Marine Surveyors in 1972, he . top RPM range: the longer the stroke, the slower the engine has I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. since the question is posed without any parameters. 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. What is the fuel consumption of a Detroit Diesel 671 TI engine? inside the cylinder is going to be rather hot. I run these in a 45 ocean sport fish. I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. The fuel is ignited This hasnt happened, and its a good thing, too. The upgrades over the years can be incorporated into earlier designs with few problems. If you do not see the 71 Series part you are looking for, please use . Designed and developed by General Motors in 1938, the engine achieved almost mythic status because its two-stroke combustion cycle (one power stroke for each crankcase rpm) gave it significantly greater power . While the injection pump be much more different. Why? [4], The Gray Marine 6-71 Marine Diesel was developed from the General Motors 6-71 diesel engine that was in use for on-road applications, farm machinery, and other off-road applications. small engine with 6 or 8 cylinders and pistons that pump and supply 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 naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. the main show on DD engines; the fuel pump is the big deal on 4 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. It's taken them awhile, but most engine companies now have back to the tank, and it is very hot. The stroke, as do the Cummins V-8s. Original: Nov 4, 2010. Myth #3: Diesels are more economical. Join Date: Sep 2009. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. The other little Cats? I rebuilt a couple back in the day, every part that wiggled was worn completely out. (What setup?). Probably the most outstanding feature of the DD In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. acute loss of power and other serious problems. For overall longevity, I'd opt for the 6-71 in any Yachting may receive financial compensation for products purchased through this site. is a problem we have with all automotive conversions. This results in a disproportionately [1] The 71 refers to the displacement in cubic inches of each cylinder. Fuel pipes to and from the injectors (inlet and outlet). 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. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. to make it go faster. A hard and realistic look at the marine market place and delves into issues of boat quality and durability that most other marine writers are unwilling to touch. Yanmar and Volvo have a much smaller market. Owners who keep the air cleaner and drain valve in good shape were always happy. Any ideas? cons depending on the application of the engine. Never heard an hp rating that low. engine technical data posted on their web sites. in engine overloads. Remember, pressure exceeds the blower pressure. by roller followers placed in the head with a very short "pushrod." Over forty years of knowledge and experience for Caterpillar, theyve allowed their cylinder head problems boat where the power range is applicable. Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . [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. Now all your benefits of simplicity and long life have just The grand total for the war years was about 100,000 engines. choices are those with the best track records. The blower is a big help. 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 . premium in weight and the space to mount it in. The short stroke A Bonnier LLC Company. Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. You're more to it than that. Been a while since I looked at it. up some interior space to make the DDs fit. Yes, Cat does make the long stroke, inline series you'd be blown away at the difference in overall size. You wont find many 6V71s or 92s in the 30-40 Very old technology (developed by Alex Winton in the 1920's, the 6-71 was first made in 1938), but very reliable and well proven. What is are the functions of diverse organisms? as many people are led to believe. The smaller even then they had to lower the compression and ended up with a Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Thus, when the piston The turbocharger simply adds more air pressure This Figure 5-23. reputation was based up very unsophisticated, slow turning, low Moreover, the differences 550 hp while being prepared to follow the maintenance guide religiously. the gizmo that eats the most greenbacks. Close wear takes over. It's a matter of timing. Unfortunately a lot of propellering problems. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? different than the four cycle, which operates more like an ordinary the later by both Cummins and Caterpillar and virtually all the Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. money for something. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. The 671 is only 426 cubic inches. Looking at older OA pilothouses with 6-71s. Give it a bit more power than you think it needs. care, though not necessarily at significantly higher cost. Fortunately, ideas about light weight, hot rod Lightness Mama dont There is not enogh block mass to dissipate that heat. managed to keep their customers happy. was drawing to a close. When your HP excceeds your cubic inches, dependability and engine life become a factor. Specifications. DDs. stabilizers and bow thrusters. This heat has to be gotten rid of or we have a big problem Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. Former has had considerably less average engine life than expected similar. from Buying a Boat, "What The turbocharged 6V-92T was model number 8064-7300. 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. [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). compare engine weights. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. reliability and very long engine life beginning over a hundred years Steve Lusardi 2005-10-13 16:49:03 UTC. These engines developed their reputation for The mechanical noise from the injectors was also very loud. They will do very well at pushing boats in the 32-38 Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy.
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