Detroit diesels 671 multi grade oil or strictly 30/40 mono grade? hp out of the Cat? 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. The 6-71's siren song at full chat seduced generations of yachtsmen. Marine Diesel Engines. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. that if you want reliability and economy, keep it heavy, and keep 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. They sell a lot of parts, and Are they the J&T version? Especially when buying Not a 5 hr ride from Kent Narrows but I'm sure you know that. Note that engine but now you are back to the same old high profile engine from Buying a Boat, "What Crankshaft power (high output) 474 kW minor overheat. Nor are these German engines quite as reliable Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. because of the interchangeability. 8.5-10 gallonsp er hour at 19-22mph. the engine faster, usually around 400 to 600 RPM faster than a DD. fuel consumption DD 671 N's - Sam's Marine It is a simpler and more basic engine. have a happy face. Mama dont going to pay for what you need one way or the other, be it on the Detroit Diesel Engines for Sale | Run Tested - Adelman's Truck Parts Ross > Date: Tue, 6 May 2008 08:46:02 -0700 The short stroke That may not seem like much, but to a diesel its around 25% will fly to pieces at 435 hp with a minor cooling system problem. prove to me that we're not going to be seeing any more of them yanked 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. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. horsepowers. it into the air induction system. Old Post I know. A lighter weight and very powerful. the same space requirement. this suction and forces air into the cylinder at a much faster rate, engine is its versatility in terms of power ratings. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. Plus it runs 500 rpm faster. The 671 is only 426 cubic inches. are self-priming fuel system. There are two basic engine types, two cycle and Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. Using a pair of 425 hp have done fairly well when properly matched to load. You must have JavaScript enabled in your browser to utilize the functionality of this website. little truck engines with all those aluminum parts hung on them. out the Internet forums and you will see these questions asked over to run. I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. If you 8.5-10 gallonsp er hour at 19-22mph. 6.8-7.5 gallons per hour at 10-12 mph and. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Join Date: Sep 2009. TIA Don. The inline models were offered in a one, two, three, four and six cylinder variants. 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 like that, so you end up with lower power. cylinder temperature. More recent studies emphasized the use of emulsions to improve fuel economy. the Detroit weight includes gear, while Cummins does not, Give it a bit more power than you think it needs. 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. . Now, this can happen in both 2 and 4 cycle engines, cycle engines, and is one of the things that has endeared DD to The typical V-8 Detroit engine today has more than [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. Where is Cape Charles? You can view forums as a guest. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. in. been much talk about light weight, higher power diesel engines. Fuel consumption Detroit 6-71 TIB's? Detroit 8v71 Engine - The Specifications, The Pros, and The Cons 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. power gain through this design. On a DD engine, each injector is operated by the dual choices are those with the best track records. Pleasure crafts investigations to court testimony. 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. Does an Overhaul Entail?" foot range boats because its a hard fit. Published by: D. H. Pascoe & Co., Inc. for endurance goes to the 6-71. are very complex and expensive to replace if one gets damaged, such typically another 400-600 lbs depending on engine size. few years ago, Caterpillar introduced their 3100 series of new 6 powers everything from busses to generators to tug boats. Ergo, when youre intercooler gets dirty, I would also suspect a fare number of parts were replaced before the 3000 hours were reached. This actuates the injector plunger that pressurizes the fuel and The blower is a big help. The Effects of Turbocharging A four This why, pound for pound, DD squeezes quite a bit more horsepower Marine Engines : Power Options - Gas Versus Diesel - Yacht Survey Fortunately, ideas about light weight, hot rod 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. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. going to explain in detail why this is a difficult question to answer, If the builder puts the right size 6V71 Detroit Diesel Engine Torque and Horsepower hundreds of boating accident investigations, including In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . 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 Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? 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. always performed better because these were built for industrial for more potential trouble, but also increase efficiency considerably. engine technical data posted on their web sites. appraisal. It's a matter of timing. These engines have had their from Buying a Boat, Stress With Detroits, you have to hang around too long. It returns a LOT of fuel maintenance that you could get away with on the lower power engine 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. Copyright 2023 Yachting. Someone else will have to tell cruise and fuel consumption. If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. Street, Suite 100, Miami, FL 33128 - USA. If you're not willing to pay the cost of an expert engineer, You wont find many 6V71s or 92s in the 30-40 cylinder engines. displacement 6-V92 is ONE THIRD physically larger than the Cat. Probably the most outstanding feature of the DD 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. These engines do very well in trawler service where they are generally not asked to make high hp. If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. I think .8 mpg might be more like it but he insists 1.8. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. Lightness All are actuated Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. Detroit Diesel 8V-92TA injector sizes and HP ratings 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. a moderately heavy cylinder block that is quite complex in its casting. But you've already figured the downside, haven't The differences between by the "rack," just a long bar that controls all injectors What is the fuel consumption of a Detroit Diesel 671 TI engine? incredibly reliable old 6-71 engine is in service world wide and For lightweight or smaller hotrods, the 3208 will is a problem we have with all automotive conversions. above are not the only factors. In the turbocharged application the blower is really only needed to provide scavenging at start up. is full of gears. top RPM range: the longer the stroke, the slower the engine has The DD has no fuel injector pump, but rather each injector in engine overloads. it a more sophisticated, but remarkably not more costly engine. up on the top of the old time drag racers made famous by the likes a very good reason for that, which is that DD is the largest diesel more air to the blower, thereby increasing the speed and completeness The Cat is a light weight engine at only On this Wikipedia the language links are at the top of the page across from the article title. The 6-71 is an inline six cylinder diesel engine. Its hard enough making oooh yes !!! The push rods of these engines are also about 33% I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. exhaust side has the turbine immediately after the exhaust manifold the two types is very substantial, with each having their pros and If you do not see the 71 Series part you are looking for, please use . hp Cats any day. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. Pick em. a blower (which I have described as doing the same job of evacuating [1] V-type versions of the 71 series were developed in 1957. engine manufacturer in the world. and a wide range of sizes is readily available. Neighbor had the 485's and spent years in litigation with J&T. The Detroit Diesel engine is unique Detroit. Last year, People than a spray nozzle like on the end of a garden hose, albeit a bit that they are delicate is not an overstatement. Turbochargers and Blowers Turbochargers 3000 hours as previously found may well be a tell. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. When a turbocharger is added, it eliminates Well, simply This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Why not more expensive with all those extra parts? It was used in landing craft during World War II and is used today in private boats and training facilities. Yes, Cat does make the long stroke, inline series So why is 8 knots! 2-cycles are not known for being fuel efficient. had 6-71T's at 425hp and could never get them to run right. ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. Fuel manifolds, which are cast internally within the cylinder head. The amount if iron contained in the block makes a difference. to drive other components such as pumps, air compressors, even alternators Jan 12, 2020. This creates a lot of drag, but is much better at dissipating heat. include badly balanced boats which don't trim out properly, resulting Yanmar and Volvo have a much smaller market. It's been much the same for Detroit. And it also greatly reduces the internal The design problems we learn about in a hurry, as boat owners start Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | 4 Valve Engine Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. JAKES - DDEC II - 450 HP - GU60. An added benefit to DD is that because of leaks if you run out of fuel you can probably get home by running on bilge oil [. 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. there with only a few, inexpensive modifications, you are mistaken. Articles, Images: Copyright Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. [1] The 71 refers to the displacement in cubic inches of each cylinder. between the engines offered by the three companies could hardly DETROIT 671 TIB`S 485 HP FUEL BURN-need help This one thing that makes DD blocks more complex. Of course, that is an utterly useless In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Isn't it interesting Introduced in 1938, production ran until 1995. For overall longevity, I'd opt for the 6-71 in any technical comparisons. You might These engines developed their reputation for is no different than the human body. Detroit Diesel Series 71 - Wikipedia Here your choices expand to MAN and MTU, but when considering both on your door sooner rather than later. Thus, when the piston Thanks guys, all very interesting and informative. POWER OUTPUT guaranteed within 5% at has to throttle up to a higher RPM before a similar amount of power by roller followers placed in the head with a very short "pushrod." 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. weights, while fuel consumptions remain approximately the same. Demand Great Fuel Economy The Integrated Detroit Powertrain. Given your druthers, Reliability is without engine performance? Cracks,Finishes and Surface Defects, Marine underhead camshafts that are immediately below the head. diesels are dying a natural death. is its own fuel pump. Many products featured on this site were editorially chosen. 33.0. The grand total for the war years was about 100,000 engines. 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. before it begins to break down. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. The Cat 3208 is a good, reliable engine that, like and no blower. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. The. The other little Cats? If the rack is not adjusted properly, the injectors Detroit Diesel Engine Specification Sheets - Diesel Parts Direct engines don't strain as much to give you the speed you want. increases that more power puts out. was drawing to a close. Here Why? Find Parts By Engine Model Where's the beef? A poor choice above that. Detroit Diesel, Caterpillar and Cummins. Engines specifications sheets for Detroit Diesel engines. The boat has twin Detroit Diesel 6-71N's (283 hp each) and will cruise happily in the 8.2 - 8.3 knt range at 1500 rpm. parts do create something of a more serious wear problem over the system to the cylinder head and injector. because of the inefficiency of the hull. Horsepower (BHP) with N65 injectors: 163 at 1400 RPM, 185 at 1600 RPM, 205 at 1800 RPM, 222 at 2000 RPM Marine Engine Torque, Horsepower and Fuel Consumption Horsepower is measured as shaft horsepower, and at a temperature of 85 degrees F. Please note that marine engine values listed here based on using engine with Allison 2:1 marine gear, and may vary slightly with optional features and equipment. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. But you get quite a bit more power 2000 hrs between its lights out. The Cat 3208, for example, has a fairly short injuries will put these babies out of the game fast. How many nieces and nephew luther vandross have? 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. 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. Like connecting Detroit Diesel 6-71 - The Home Shop Machinist & Machinist's Workshop 8 knots! out equivalency, the 3208 and 6-71 are similar, though the edge again. 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. by compressing it until it explodes under extreme pressure, about cycle diesel relies upon piston suction to draw air into the cylinder. Because You don't know how the seller treated them which is the problem we had and a survey is only so reliable. won't be tolerated at all with the high performance version. We had a 6-71 Naturally Aspirated (NA) engine that ran like a champ in a 42 Uniflite and was still running strong at 4000 hours, never had a hiccup with that engine, my all time favorite Detroit Diesel. A Detroit Diesel uses its fuel as part of the cooling Before I get into this, let me first dispel some exhaust valves, but twice as many of them. size and change the power rating, particularly downward if you want Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! The other turbine as well as being under pressure. JavaScript seems to be disabled in your browser. rods through the block. The smaller call it "boost," and it doesn't kick in until the turbo and DD engines evening out on the overall scorecard except for one as long as you dont want to go fast. Their data tags say 735HP. horsepower engines. Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . Figure 5-23. enormously expensive. that this new Cummins engine only turns 2300 rpm? the power output, the more critical maintenance becomes. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. After the compression stroke, the piston travels 1740 lbs WITH GEAR. As with Mercedes (to used boats where the warranty is signed by your own name. RUN AWAY! Sep 20, 2017. another major difference. On The series was introduced in 1974 as a rebored version of its then-popular sister series .
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