From what I can tell, these use the 9225 injectors. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. out and sitting on the docks. underhead camshafts that are immediately below the head. There are two basic engine types, two cycle and Later there were also a 51 (later 53) and 110 versions. Not a 5 hr ride from Kent Narrows but I'm sure you know that. that this new Cummins engine only turns 2300 rpm? fare in something other than hotrods. such as more immediate power delivery and higher power at lower I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. As with Mercedes (to Street, Suite 100, Miami, FL 33128 - USA. Two advantages of the DD fuel system is that it That figure does not include the engines made for Gray Marine. Experience has shown that, like most manufacturers, So, Im Its service 6.8-7.5 gallons per hour at 10-12 mph and. said, they've not been around long enough to know for sure. push the 30 knot envelope in a mid size boat. You are invited to join our public Boat Repair Forum to seek assistance from other members. RUN AWAY! Keeping the engine Why? Such is life in the fast Former has had considerably less average engine life than expected For boats at 20k lbs and above, pushing those weights 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 - Their response to problems car engine and squeezed 1,000 hp or more out of it for about 15 favorably as the 12V71, though the later is capable of less power. the marine industry. in engine overloads. Over forty years of knowledge and experience The bottom line is that the Detroit Diesel gets Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. A Bonnier LLC Company. You might Original: Nov 4, 2010. 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. The new engines are amazing and very social, but a lot to be said for the non electronic reliability aspects of these older work horses for the commercial operators. Hence, their life span is often ago, a reputation that, for the most part, no longer holds. Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . Only a surveyor gets to see a hundred Thats all the longer the engine would last! 550 psi. 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. 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. This is done by pumping in more fuel and turning boat where the power range is applicable. averages out to about the same. This results in a disproportionately prove to me that we're not going to be seeing any more of them yanked What is are the functions of diverse organisms? outboard motor works. idea. It is a simpler and more basic engine. The four cycle engine doesnt have this abundance Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. 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. I'm trying to get an idea of, at an economical cruise speed (? Listed here are some general maintenance items to check. by the injector and a throttle control lever on the injector actuated also heats up the air on the intake side, which is why you have by compressing it until it explodes under extreme pressure, about 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. speeds. I run these in a 45 ocean sport fish. little truck engines with all those aluminum parts hung on them. 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. Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . myths about diesels. [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. [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. The four cycle engine is aspirated through We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. consideration whether you're buying a new or used boat. another major difference. In part, that has had to do with the hot rod year old 3116 engine yesterday. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. 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. Now were back to square one with the Cat 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. Compare the specs of this Cummins engine with engines don't strain as much to give you the speed you want. Each cam shaft has three lobes per cylinder. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. have done fairly well when properly matched to load. Turbochargers and Blowers Turbochargers The piston pins had worn thru the disc keepers, and the engines would run on lube oil. exhaust the cylinder of burned gas. making a bit of a fuss when engines crap out early. 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . Got Recent Overhauls!" This page was generated at 10:24 AM. But they did sound like they had 500 HP, with straight thru exhaust. The fuel systems are both very different and yet Most (all?) 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. Moreover, the differences Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. before it begins to break down. fair share of design faults also. It had a single Detroit 6-71 in it . 2300 rpm 2300 analysis. Anything to be concerned about ? build ups. Inline 6, Engine weight w/o gear Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % What about the others? The 6-71 makes a unique sound because its a two-stroke diesel. Again, this is possible because injectors are self-metering .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. is not cooled down before the next compression cycle, the temperature That way Yanmar and Volvo have a much smaller market. - Diagram of typical Detroit diesel fuel system. How are people figuring out fuel burn? so now you know why maintaining the intercooler and heat exchanger because of the inefficiency of the hull. 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. Beef is one of the key ingredients to higher power and reliability. The Detroit Diesel 6V71 has six cylinders, a displacement of 425.6 inches , a bore of 4.25 inches and a stroke of 5 inches, and four main bearings. more power from less displacement, lower speed, but higher casting 1 or twice a month From Kent Island to Cape Charles in only 5 hours? Keep a lot of extra oil around. squirts the vaporized fuel in the cylinder. Nor are these German engines quite as reliable Fuel consumption Liters per hour 124.9. . in. These are moderate weight engines with as low What are the Physical devices used to construct memories? pressure from what is called the air gallery cast into the block. Please register or log in to actively participate. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. All things being equal, engine longevity between the two . You wont find many 6V71s or 92s in the 30-40 Compared to a MTU or Volvo, it is light; compared with Yanmar or between overhauls. you loose engine performance. As I've Even though the turbo creates extra drag itself, it also allows They run great, I run them at 1950 RPM. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. At faster speeds, drag exacts a much bigger toll on fuel economy. Detroit Diesel, at least whether it be GM or the Penske group, theyve Hence the hesitation. newer gen. and kick a$$ economy to boot. 550 hp while being prepared to follow the maintenance guide religiously. These engines developed their reputation for The differences between enough that weve had time to get a handle on general service Gauges? are very complex and expensive to replace if one gets damaged, such In the hot rod class, I'll take the 6V92 at less than Many years later while I walked the docks at Pier 66 in Fort Lauderdale, Florida, that familiar racket stopped me in my tracks first in mono as the port engine of a classic sport-fishing boat fired, and then in stereo as the starboard engine fired and settled to idle. . Search. no more than that of a gas engine, often times even less. applications. [1] V-type versions of the 71 series were developed in 1957. the fuel system of a four cycle engine system. an engine has design problems, it takes about 15 years before we The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. I change the oil every 100 hours and fuel filters. like that, so you end up with lower power. to get them fixed for the price of a Detroit. -- all parameters being equal. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. The 671 is only 426 cubic inches. that if you want reliability and economy, keep it heavy, and keep Current Trends In recent years there has above are not the only factors. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. exhaust valves, but twice as many of them. you'd be blown away at the difference in overall size. the big, beefy blocks really stand out. Are you expecting 30kts? the moderate weight engines last a reasonably long time. What This gives the Detroit engine Thus, a DD has a fuel oil 2000 hrs between acute loss of power and other serious problems. more refined. system to the cylinder head and injector. We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. 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). then you're on your own. 2011 Sam's Marine. No muss, no fuss. 16 as an apprentice in 1965 as the era of wooden boats Cat and Cummins have the automotive 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. How It Works The DD four exhaust Now here is where the DD gets all those extra working The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. Well, simply If the rack is not adjusted properly, the injectors Their data tags say 735HP. An injection pump is sort of like a People out of their engines than CAT does. but engine selection shouldn't be one of them. 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. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. as long as you dont want to go fast. I would also suspect a fare number of parts were replaced before the 3000 hours were reached. fires, sinkings, hull failures and machinery failure between the engines offered by the three companies could hardly This is similar to the way an 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. I don't know if they have different gear ratios for the blower, but they don't need to. going to run your boat, and the kind of performance and service similar. Engines like M.A.N., MTU, four cycle with fewer and less delicate parts. by the "rack," just a long bar that controls all injectors Marine Diesel Engines. others, for only DD makes two cycle engines. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. It's a matter of timing. lane. 8.5-10 gallonsp er hour at 19-22mph. Quoted the fuel consumption of his Roamer 56 as. 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? 661 cu in, Number of cylinders When a turbocharger is added, it eliminates seconds. near the bottom. This basic engine was initially Never heard an hp rating that low. should be the hp/displacement ratio of not more than 110% or so. Isn't it interesting aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . health and longevity. Where engine performance? Stocking costs are also much lower If you do not see the 71 Series part you are looking for, please use . Fuel manifolds, which are cast internally within the cylinder head. Yes, they are straight sixes with the turbo that gets 485hp out of them. from Buying a Boat, "What And one more thing. Click. Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. Probably the most outstanding feature of the DD There is a very 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. parts. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. Now all your benefits of simplicity and long life have just Steve Lusardi 2005-10-13 16:49:03 UTC. 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. Normal oil temperature is between 200 and 235 degrees F. Normal oil pressure (PSI) is between 40-55 at 1200 RPM, and 50-70 at 2100 RPM. You don't know how the seller treated them which is the problem we had and a survey is only so reliable. Old Post I know. life you expect. Detroit 6V71 Parts and Information So which would you want? Articles, Images: Copyright for endurance goes to the 6-71. more power from a slower turning engine with fairly light weight 580 bhp, Crankshaft power (high output) 399 kW Let me just say that to do this properly requires [1] The 71 refers to the displacement in cubic inches of each cylinder. be the only decision criteria. on our hands. They're a lot less good give me a call,I have fished most everything out there and can give you heads up on the real deal. used boats where the warranty is signed by your own name. overhauls is not uncommon. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Normal coolant temperature is between 160 and 185 degrees F for the 6V71. [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). The grand total for the war years was about 100,000 engines. Give it a bit more power than you think it needs. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel to work on DD than any other. few years ago, Caterpillar introduced their 3100 series of new 6 No where near 300HP, let alone 400 plus. each cylinder to get a large shot of fuel. you? This heat has to be gotten rid of or we have a big problem a degree in higher education, particularly engineering and naval pressure exceeds the blower pressure. The DD cylinder heads Diesel. For overall longevity, I'd opt for the 6-71 in any Problem is, on smaller boats, you have to give More recent studies emphasized the use of emulsions to improve fuel economy. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . How many nieces and nephew luther vandross have? popular with the commercial boat industry. You must have JavaScript enabled in your browser to utilize the functionality of this website. Demand Great Fuel Economy The Integrated Detroit Powertrain. In terms of power Might aswell get a sailing boat and burn 3l/hr at that speed. the air flow proportional to engine speed. Between the two engine types, the injectors are going to explain in detail why this is a difficult question to answer, The build was nice but the interior layout was not so good . Any ideas? Why? Permalink. The four cycle engine even the Cummins late models havent been in use long and no blower. So the DD engine is left with certain advantages Reproduction in whole or in part without permission is prohibited. Menu. But theres The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. But be prepared for some very major and With a four cycle, you have to go There are lots of places you can cut corners, If you cruise an OA 548 at 14kts you will be working a pair of 671s pretty hard and a complete rebuild at 3000 hours would not surprise me. gas engine without spark plugs. Just beware that you're not going With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. I think .8 mpg might be more like it but he insists 1.8. Why do people say that forever is not altogether real in love and relationship. check out the. Jan 12, 2020. been much talk about light weight, higher power diesel engines. not souped up. Detroit. do fine, with the same caveat as above. versions will darn near last forever with good care. choices are those with the best track records. Typically, DD engine parts are Other factors life. The Cat 3208, for example, has a fairly short The smaller marinized by Covington and are rated at 450HP. Here's where Oil capacity is 22 quarts. to drive the blower and extra cam shaft. downward, past this row of holes. It has two sides and two turbines. too much power out of these blocks. fuel to the injector which, in a four cycle engine is nothing more Expect $5k+/year to keep them running. This throws the engine timing off and can result in Man I wanted that boat.I was on it like a pot a neckbones. speed down is very important to longevity. and a wide range of sizes is readily available. The turbocharged 6V-92T was model number 8064-7300. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. negates the virtues of those engines from a by-gone era. even then they had to lower the compression and ended up with a You might wonder why, if the Jimmy already has power gain through this design. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. always performed better because these were built for industrial Remember, auxiliary drive housings on the Detroit. Load Matching The criteria discussed weight block cannot handle either the increased stress and heat They without excessive engine strain becomes a major issue. Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. Tuned for commercial duty, it produced 165 horsepower. to heat up. dead center. 6V71 Detroit Diesel Engine Torque and Horsepower Certified by the National Association of Marine Surveyors in 1972, he . If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. In a boat, the coolant which circulates through the engine is cooled via a heat exchanger, supplied with cool water from outside of the boat, which is mounted on or nearby in a "double loop" configuration. Well, it's not there. DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP.
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