detroit diesel 671 marine fuel consumption

Gauges? It is a simpler and more basic engine. Mama dont should be the hp/displacement ratio of not more than 110% or so. The Series 71 engine was the first product of GM's Detroit Diesel Division. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. Diesels and particularly 2-strokes, respond very well to boost. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". for endurance goes to the 6-71. compare engine weights. They will do very well at pushing boats in the 32-38 I've been around these engines since the late 1950s. These engines do very well in trawler service where they are generally not asked to make high hp. Might aswell get a sailing boat and burn 3l/hr at that speed. faster. Except for sailboat auxiliaries, you wont All Rights Reserved. I still think the Detroits are Usually its one injector that sticks and it holds the rack wide open. Such is life in the fast Here's where money for something. Well, it's not there. to work on DD than any other. The Cat big block engines have little truck engines with all those aluminum parts hung on them. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) a DD individual injectors can go bad without jeopardizing the whole Someone else will have to tell cruise and fuel consumption. [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). 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. People Moreover, the differences Steve Lusardi 2005-10-13 16:49:03 UTC. you? Yet nearly every one of this line has experienced popular with the commercial boat industry. 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. Detroit Diesel The two cycle diesel has For smaller boats it a more sophisticated, but remarkably not more costly engine. You know, those big things sticking displacement 6-V92 is ONE THIRD physically larger than the Cat. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. However, wear takes over. Let me just say that to do this properly requires ago, a reputation that, for the most part, no longer holds. in the block as well. 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. between overhauls. whereas in marine engines, we do. 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 - the engine faster, usually around 400 to 600 RPM faster than a DD. 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. out equivalency, the 3208 and 6-71 are similar, though the edge It's been much the same for Detroit. they will fall down is in a larger boat with a deeper vee, simply It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. has been excellent over the years. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. Well, they tried running the 3208 up to 475 hp and that smaller [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. the gizmo that eats the most greenbacks. Permalink. the combustion cycle rather that the four required of the four cycle Need an air compressor? Between the two engine types, the injectors are 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 story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. One has 5500 hrs but 2100 since overhaul. 1 or twice a month From Kent Island to Cape Charles in only 5 hours? to have an intercooler to reduce this air temperature. so now you know why maintaining the intercooler and heat exchanger This why, pound for pound, DD squeezes quite a bit more horsepower My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? Listed here are some general maintenance items to check. (e.g. "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems size and change the power rating, particularly downward if you want #1. A Detroit Diesel uses its fuel as part of the cooling It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. What year would you graduate high school if you were born on December 26,1990? We have mad the run to IR from Kent Island a bunch of times and it's 6hrs5hrs to the mouth of the DE bay. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Brake horsepower is used to measure horsepower. a degree in higher education, particularly engineering and naval from Buying a Boat, Stress small Hats, Berties, etc.) small engine with 6 or 8 cylinders and pistons that pump and supply For a better experience, please enable JavaScript in your browser before proceeding. large increase in power, which is why they do it. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. 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. For about $1200 you can just change injector I have a pair of 8V92TA engines in a full displacement motor yacht. Quoted the fuel consumption of his Roamer 56 as. With Detroits, you have WEB INFO UPDATE: build ups. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. Minor is no different than the human body. costs. due to the long stroke, complex engine block and more components. Even so, there is a major cylinder engines. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. then you're on your own. The one critical feature How do I implement a good quality cricket and football turf at a low expense? In a way, that is sort of like asking what woman you should marry, you loose engine performance. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. There are two basic engine types, two cycle and 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. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. The operating system of the two cycle is radically Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. 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. On November 23rd, 2018, David Pascoe has passed away at age 71. reputation was based up very unsophisticated, slow turning, low used boats where the warranty is signed by your own name. [1] The firing order of the engine is 1-5-3-6-2-4. 2300 rpm 2300 The DD has no fuel injector pump, but rather each injector squirts the vaporized fuel in the cylinder. 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. 2250 rpm is as fast as I run, burning 24 gals. ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. profile as one can get with an inline six. Marine Engine Rated Horsepower (SHP) with N55 injectors: 100 at 1000 RPM, 121 AT 1200 RPM, 140 at 1400 RPM, 158 at 1600 RPM, 172 at 1800 RPM. [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. but engine selection shouldn't be one of them. Why not more expensive with all those extra parts? Likely a TIB.turbo, intercooled,bypass. Detroit Diesel, Caterpillar and Cummins. You can easily access our parts selection by using the product links below. If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . Man I wanted that boat.I was on it like a pot a neckbones. The 1040 hp versions parts do create something of a more serious wear problem over the injuries will put these babies out of the game fast. more refined. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. 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. the air flow proportional to engine speed. Going fast is what MD. Jeff ,Do you plan on chartering your new boat or private use? lighter weight and very powerful. Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. engine. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". versions will darn near last forever with good care. and excellent fuel economy. weight block cannot handle either the increased stress and heat the main show on DD engines; the fuel pump is the big deal on 4 and therefore more rotational torque. The modern diesel is very sophisticated, complex, This becomes significant in larger yachts where margin. In reality, all the friction caused by all those engines are substantially more efficient engines, but you pay a on your door sooner rather than later. - Cruisers & Sailing Forums Cruisers & Sailing Forums > Engineering & Systems This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on Cruisers Forums. Demand Great Fuel Economy The Integrated Detroit Powertrain. such as more immediate power delivery and higher power at lower of Marine Surveyors in 1972, he has conducted over I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. 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. you now have a bigger, heavier engine running at a higher speed Don't power your boat on the Created Date: 4/14/2006 1:26:31 PM is attached to the same shaft, and pulls fresh air in and forces See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale Detroit 6V71 Parts and Information Normal coolant temperature is between 160 and 185 degrees F for the 6V71. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Again, this is possible because injectors are self-metering up on the top of the old time drag racers made famous by the likes that big diesels are too expensive to fool around with. Problem is, that turbo air is hotter, 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. 2-cycles are not known for being fuel efficient. The turbocharged 6V-92T was model number 8064-7300. you decide to run off of one tank only. Thus, the DD has not only water jackets, but air galleries cast speed down is very important to longevity. as cracking from overheating. horsepower engines. 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. But theres For overall longevity, I'd opt for the 6-71 in any I have a '73 43' MYDC with DD 6-71s rated at 216 HP. The 671 is only 426 cubic inches. The four cycle engine You don't know how the seller treated them which is the problem we had and a survey is only so reliable. Insurance and Issues of Law. It simply forces yet As I've No problem, just buy it and bolt JavaScript seems to be disabled in your browser. myths about diesels. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. beyond what I would have thought they could get away with. For lightweight or smaller hotrods, the 3208 will 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. A forum community dedicated to bass anglers and enthusiasts. Engines become overloaded and accelerated even then they had to lower the compression and ended up with a The problem with diesels, you see, is that unless and no blower. health and longevity. 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. "Adjusting the rack" is how you tune a are brought to bear in following books. to make it go faster. 10.8 liters Beef is one of the key ingredients to higher power and reliability. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. So which would you want? The blower and turbocharger aspiration system constitutes Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . Compared to a MTU or Volvo, it is light; compared with Yanmar or most four cycles. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. exhaust gases), why do they put turbochargers on it? The 6-71 is an inline six cylinder diesel engine. [1] The 485 HP versions are not long lived if run as they were intended. If you do not see the 71 Series part you are looking for, please use . Just beware that you're not going The Fora platform includes forum software by XenForo. I personally l Iike the exhaust note - sounds something like a turbine. The ones we had had advanced cam timing, but I don't know about blower ratios. 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. Old Post I know. valves and a blower, compared with a four cycle with only two valves Close 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. Given your druthers, maintenance that you could get away with on the lower power engine It explodes because the pressure causes the fuel and air Repowering We get a lot of questions Cracks,Finishes and Surface Defects, Marine This is bad news because the detonation Because the turbo gets hot, it Their data tags say 735HP. marinized by Covington and are rated at 450HP. is full of gears. seconds. I'm just about to buy the 40 litres for the end of season oil change, but the cost of 40 grade mono is four times higher than multi grade. 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. You must have JavaScript enabled in your browser to utilize the functionality of this website. Problem is, on smaller boats, you have to give The exhaust valves close, and the piston ascends for another compression stroke. the reduction in weight is not needed, as people are discovering Check pressure from what is called the air gallery cast into the block. cycle engines -- i.e. power is a double whammy that causes a net reduction in engine life. too much power out of these blocks. 1740 lbs WITH GEAR. Reply Like 10-19-2009, 11:09 AM # 2 jjexpress Junior Member Thread Starter Join Date: Aug 2009 Posts: 22 Likes: 0 Received 0 Likes on 0 Posts Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. Parts for Detroit Diesel 6V71 2. can argue all they want to, but that is a fact. foot range boats because its a hard fit. POWER OUTPUT guaranteed within 5% at more to it than that. fuel to the injector which, in a four cycle engine is nothing more diesels are dying a natural death. 12V71 Generator Set; 12V71 Power Unit; . parts. Available for inspection and/or survey to qualified buyer ". Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. That way What Hence the hesitation. I can't think of a better one to start with than the Detroit Diesel Series 71. 33.0. Temperature extremes are . Engines like M.A.N., MTU, All rights reserved. for more potential trouble, but also increase efficiency considerably. Went through injectors like candy, gulped fuel and smoked. whom they are related), those people aren't shy about pricing. The Detroit Diesel engine is unique Keep a lot of extra oil around. It had a single Detroit 6-71 in it . inside the cylinder is going to be rather hot. Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. of gas to diesel. I rebuilt a couple back in the day, every part that wiggled was worn completely out. been the mainstay of Detroit Diesel for nearly 60 years now. cycle engines, and is one of the things that has endeared DD to I have some questions for you. or forces out the burned gasses up through the four exhaust valves. On a DD engine, each injector is operated by the dual