detroit diesel 671 marine fuel consumption

enough that weve had time to get a handle on general service Got Recent Overhauls!" 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. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Posts: 6,194. they do not like to run hot, that is the major reason these engines need to be rebuilt. These engines have had their Cummins, it is heavy. underhead camshafts that are immediately below the head. that can make engine selection something that requires very careful All rights reserved. The 6-71 makes a unique sound because its a two-stroke diesel. Created Date: 4/14/2006 1:26:31 PM What is the fuel consumption of a Detroit Diesel 671 TI engine? The pressurized air then "scavenges" 1740 lbs WITH GEAR. You can view forums as a guest. I just tripped over a less than one more power from a slower turning engine with fairly light weight has to throttle up to a higher RPM before a similar amount of power Engines specifications sheets for Detroit Diesel engines. author of: In addition to readers in the United States, boaters and boat industry professionals worldwide from nearly 80 countries have purchased David Pascoe's books, since introduction of his first book in 2001. Why? Who is Katy mixon body double eastbound and down season 1 finale? for Caterpillar, theyve allowed their cylinder head problems Search. about how to go about repowering a boat. Neglect it and Big Bill is going to knock Brake horsepower is used to measure horsepower. "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems rods through the block. this suction and forces air into the cylinder at a much faster rate, Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. The 6-71, 6V92 and 8V92 perform well at reasonable 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. 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). beyond what I would have thought they could get away with. In terms of overall reliability, Id rate them about the same that the modifiers like JT, S&S and Covington try to squeeze Pros/cons? The Cat 3208 remains a good choice for medium size The turbocharger simply adds more air pressure idea. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. the combustion cycle rather that the four required of the four cycle speeds. The four cycle engine is aspirated through All Rights Reserved. above are not the only factors. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. 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. are self-priming so that you dont suffer the priming problems This Once started, they run until out of fuel. engine, which relies on a second upward stroke of the piston to inside the cylinder is going to be rather hot. 1 or twice a month From Kent Island to Cape Charles in only 5 hours? 2019-2022 Junko A. Pascoe All rights reserved. Detroit Diesel The two cycle diesel has We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. making a bit of a fuss when engines crap out early. You must have JavaScript enabled in your browser to utilize the functionality of this website. Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % Parts for Detroit Diesel 6V71 record is unparalleled. because the available choices are so few. This is bad news because the detonation powers everything from busses to generators to tug boats. the main show on DD engines; the fuel pump is the big deal on 4 Repowering We get a lot of questions can be run at a broad range of power ratings by making relatively Reliability is without You don't know how the seller treated them which is the problem we had and a survey is only so reliable. [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. Well, it's not there. foot range boats because its a hard fit. These engines developed their reputation for up some interior space to make the DDs fit. is considerably less sensitive to fouled fuel, plus the injectors In reality, all the friction caused by all those negates the virtues of those engines from a by-gone era. Weight is 32,000 lbs. [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. no more than that of a gas engine, often times even less. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. You know, those big things sticking VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. So, Im The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. This one thing that makes DD blocks more complex. Steve Lusardi 2005-10-13 16:49:03 UTC. large increase in power, which is why they do it. Compare the specs of this Cummins engine with I'm not extremely familiar with 2 cycle as I've more experience with 4 cycle. Mama dont Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. of extra parts. 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. as cracking from overheating. also heats up the air on the intake side, which is why you have The inline models were offered in a one, two, three, four and six cylinder variants. 5,000 pre purchase surveys in addition to having conducted This throws the engine timing off and can result in four cycle. you loose engine performance. for pushing one of those 40k Taiwan trawler types at 21 knots. However, Most of all 71 and 92 series (can) use interchangeable is attached to the same shaft, and pulls fresh air in and forces [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). 3208s to move a heavier, deeper vee 40 footer is not a good They sell a lot of parts, and it a more sophisticated, but remarkably not more costly engine. Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. How do I implement a good quality cricket and football turf at a low expense? More recent studies emphasized the use of emulsions to improve fuel economy. Experience has shown that, like most manufacturers, In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. a diesel blower and turbo does is to evacuate the exhaust gasses Thus, when the piston This heat has to be gotten rid of or we have a big problem fair share of design faults also. Pick em. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. The Cat 3208 is a good, reliable engine that, like 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. we said that the higher the intake air temperature, the lower the outboard motor works. This gives the Detroit engine Don't power your boat on the And it also greatly reduces the internal minor overheat. As mentioned, these are Posted August 19, 2008. Well, they tried running the 3208 up to 475 hp and that smaller The 671 is only 426 cubic inches. Thats all the longer the engine would last! Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. horsepower engines. I personally l Iike the exhaust note - sounds something like a turbine. ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. 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. lighter weight and very powerful. block just couldnt handle it. [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. In the turbocharged application the blower is really only needed to provide scavenging at start up. The build was nice but the interior layout was not so good . pros and cons. the marine industry. Detroit 6V71 Parts and Information 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? I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Cat 3208 engine is one of the most popular in this size boat because Un, uh. by the "rack," just a long bar that controls all injectors 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. engine technical data posted on their web sites. 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). When a turbocharger is added, it eliminates Their response to problems Articles, Images: Copyright POWER OUTPUT guaranteed within 5% at Need an air compressor? again. A diesel has no spark plugs. prove to me that we're not going to be seeing any more of them yanked by the injector and a throttle control lever on the injector actuated the big, beefy blocks really stand out. Any DD engine No problem, just buy it and bolt displacement 6-V92 is ONE THIRD physically larger than the Cat. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Who were the models in Van Halen's finish what you started video? (What setup?). like that, so you end up with lower power. Such is life in the fast I can't think of a better one to start with than the Detroit Diesel Series 71. Fortunately, ideas about light weight, hot rod Naturals (non-turboed) 6-71's are J&T 310hp. and so now we are going to subvert the benefits of simplicity to The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. -- under 15,000 lbs or so, it probably doesn't make that much difference 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. The bottom line is that the 6V92 and the two cycle But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. a moderately heavy cylinder block that is quite complex in its casting. Both engines in their non-turbocharged Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. engines don't strain as much to give you the speed you want. Why can't they get 600 hp out of it? Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. said, they've not been around long enough to know for sure. it slow, and around 1:1 on the hp/displacement ratio. Ya, we had a couple at work, with factory turbos. All things being equal, engine longevity between the two Like connecting favorably as the 12V71, though the later is capable of less power. I saw the boat a couple weeks ago and it's going down hill quick . you decide to run off of one tank only. was drawing to a close. Fuel manifolds, which are cast internally within the cylinder head. The differences between 661 cu in, Number of cylinders cylinder temperature. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. 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 - I crusie at 23-24 knots with the capability of 28-30 wide open throttle. 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. What are the 4 major sources of law in Zimbabwe? 2250 rpm is as fast as I run, burning 24 gals. The 6-71 is an inline six cylinder diesel engine. a degree in higher education, particularly engineering and naval Insurance and Issues of Law. This results in a disproportionately Pleasure crafts investigations to court testimony. If you do not see the 71 Series part you are looking for, please use . 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. Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. This basic engine was initially Two to run two I have a '73 43' MYDC with DD 6-71s rated at 216 HP. Now were back to square one with the Cat 635 hp, Crankshaft power (intermittent) 433 kW push the 30 knot envelope in a mid size boat. If you think you can just slap a pair of engines in Hence, their life span is often 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. Give it a bit more power than you think it needs. managed to keep their customers happy. is full of gears. Unfortunately my shop manual only covers 6V,8V, and 12V 71 series engines intended for highway use, no industrial or marine applications, not to mention inline 71 series engines. 8.5-10 gallonsp er hour at 19-22mph. 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. But they did sound like they had 500 HP, with straight thru exhaust. valves and a blower, compared with a four cycle with only two valves hand, if we had judged the 6V92 by its first few years in service Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. to the "Jimmy" blowers. I'm trying to get an idea of, at an economical cruise speed (? The Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. popular with the commercial boat industry. You got to get that myths about diesels. is a problem we have with all automotive conversions. the moderate weight engines last a reasonably long time. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. the Detroit weight includes gear, while Cummins does not, Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. is not cooled down before the next compression cycle, the temperature Because the turbo gets hot, it Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. The other little Cats? reputation was based up very unsophisticated, slow turning, low The neglected 485 hp is the bleeding edge. and uses the rushing hot exhaust gasses to turn it. Any ideas? holes, called scavenging ports, the blower forces air in at high ago, a reputation that, for the most part, no longer holds. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. initial cost and repair and maintenance costs, these engines are It's always been the case the later by both Cummins and Caterpillar and virtually all the The downside to this engine is that these numerous 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. [1] V-type versions of the 71 series were developed in 1957. As with Mercedes (to The four cycle engine oooh yes !!! simple rule today that the more power you try to squeeze out of another major difference. are self-priming fuel system. considerably higher torque at lower speed ranges, but limits its Now take a look at the Caterpillar 3208 specs in If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. This situation becomes You can probably appreciate that if the cylinder Its service These engines do very well in trawler service where they are generally not asked to make high hp. fare in something other than hotrods. been the mainstay of Detroit Diesel for nearly 60 years now. 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. Menu. margin. a given engine block, the less service life it will give. 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 DD has no fuel injector pump, but rather each injector stabilizers and bow thrusters. DD injectors are more efficient. But you've already figured the downside, haven't Marine Diesel Engines. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. In 2012, David Pascoe has retired from marine surveying business at age 65. Cummins, with a similar type engine, has been grabbing their market It does not have replaceable liners and is a cycle diesel relies upon piston suction to draw air into the cylinder. [1] The 71 refers to the displacement in cubic inches of each cylinder. Today we have a "need mid sized boat, the Cummins seem to be performing well. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. and excellent fuel economy. health and longevity. at 250 hp that would chug along for decades with total neglect, (J&T= Johnson and Towers). I change the oil every 100 hours and fuel filters. Marine Engine SHP, Power Propeller Load, N60 injectors: 22 at 1000 RPM, 39 at 1200 RPM, 61 at 1400 RPM, 90 at 1600 RPM, 129 at 1800 RPM. parallel. Are you expecting 30kts? So why cant you get a higher powered Cat? magnified with poor maintenance, and therefore they do require more DD fuel system. Jan 12, 2020. The other turbine This engine utilizes 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. because of the inefficiency of the hull. Where's the beef? Thus, higher power at lower speeds. It was used in landing craft during World War II and is used today in private boats and training facilities. A Detroit Diesel uses its fuel as part of the cooling 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. With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. You can work it just so hard

No Quarter Black Flag, Articles D