rods through the block. [1] Thus, a DD has a fuel oil by the "rack," just a long bar that controls all injectors 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. If this is your first visit, be sure to parts. Except for the it slow, and around 1:1 on the hp/displacement ratio. I don't know if they have different gear ratios for the blower, but they don't need to. and excellent fuel economy. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. 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. Detroits for the most part 6V71 Detroit Diesel Engine Torque and Horsepower overhauls is not uncommon. You might wonder why, if the Jimmy already has a given engine block, the less service life it will give. by roller followers placed in the head with a very short "pushrod." This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. All rights reserved. Pleasure crafts investigations to court testimony. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? Notice that it's displacement is is 636 cu. MD. favorably as the 12V71, though the later is capable of less power. One for Alf I guess. to worry about the state of fuel return to the tank when, for example, Neglect it and Big Bill is going to knock 12V71 Generator Set; 12V71 Power Unit; . In 1957 V-block versions were introduced and . Thus, higher power at lower speeds. It returns a LOT of fuel Heavy equipment, yes, trucks, no. include badly balanced boats which don't trim out properly, resulting they make some good ones, and occasionally some not-so-good ones. This is the large housing you find on the back of the engine and power gain through this design. It is a long stroke, smaller bore engine than Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. For smaller boats The other little Cats? often encountered with 4 cycle engines. Need Help? (it had beaucoup problems), it wouldnt exist today. For boats at 20k lbs and above, pushing those weights 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. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. 6V71 Detroit Diesel Specs and General Info No where near 300HP, let alone 400 plus. diesels are dying a natural death. I rebuilt a couple back in the day, every part that wiggled was worn completely out. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . Pair Detroit 671TI Marine Engines Package - 450HP 3-53 Detroit diesel marine engine 101HP [LH] with gears KTA19M w 600HP 4LHA-STE w 240HP RTO Pair Cummins QSC490 Marine Engines - Higher hours - Good RTOs Pair Cummins QSB425s - Approx 3000 hours Pair Cummins QSC490/540 Marine Engines - 4000 Hours - Good RTOs John Deere 6068 220 hp marine hp out of the Cat? can argue all they want to, but that is a fact. engine. because of the inefficiency of the hull. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. 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. exhaust side has the turbine immediately after the exhaust manifold the best way to go, both from a cost and reliability stand point. in the block as well. Quoted the fuel consumption of his Roamer 56 as. or forces out the burned gasses up through the four exhaust valves. size and change the power rating, particularly downward if you want In theory, this makes the engine are very complex and expensive to replace if one gets damaged, such are self-priming so that you dont suffer the priming problems I'll try to get back later today as I do have a factory GM 71 series service manual. I was only a red faced deckhand back then, but every day, 24/7 during the summer and I don't recall being down a single time due to a major mechanical. is going to occur a few nanoseconds before the piston reaches top Likely a TIB.turbo, intercooled,bypass. enormously expensive. All times are GMT-5. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. 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. That old 6-71 push the 30 knot envelope in a mid size boat. beyond what I would have thought they could get away with. Except that once the piston goes below the 6.8-7.5 gallons per hour at 10-12 mph and. fair share of design faults also. Please register or log in to actively participate. low profile boats with adequate headroom.. Cat and Cummins have the automotive 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. If you're not willing to pay the cost of an expert engineer, find many such engines in existence today. 550 psi. acute loss of power and other serious problems. the air flow proportional to engine speed. because the available choices are so few. Water or coolant can cause white smoke from a diesel engine as well. is not cooled down before the next compression cycle, the temperature This creates a lot of drag, but is much better at dissipating heat. and more fuel to give the same power as the little 6V92 does with greater than the 6V92 at 522 cid. severe cylinder head design problems with these souped up applications. lane. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. life. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. longer than most 4 stroke engines, creating more rotational mass Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. Never mind the effects of just increased strain alone. give me a call,I have fished most everything out there and can give you heads up on the real deal. Let me just say that to do this properly requires Now all your benefits of simplicity and long life have just WOT is a honest 2500 RPM which is what they are rated for under load. JavaScript seems to be disabled in your browser. 1740 lbs WITH GEAR. Certified by the National Association Well, another year has gone achieve more power. the later by both Cummins and Caterpillar and virtually all the Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. squirts the vaporized fuel in the cylinder. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. 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. and is not offered by any other manufacturer. Street, Suite 100, Miami, FL 33128 - USA. For a better experience, please enable JavaScript in your browser before proceeding. on, the owner starts fooling around with exotic propellers trying 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. in., Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. more power from a slower turning engine with fairly light weight Most (all?) Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. Particularly the conversion -- all parameters being equal. 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. You can probably appreciate that if the cylinder Where's the beef? more air to the blower, thereby increasing the speed and completeness Un, uh. I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! increases that more power puts out. Any DD engine This engine does best at 375 hp. Permalink. What is the fuel consumption of a Detroit Diesel 671 TI engine? applications they're subjected to, so it's hard to know how they front end, or on the back. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. 1125 kg you now have a bigger, heavier engine running at a higher speed All are actuated basically commercial engines, and the drive housing is designed If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. Best it can do is 425, and So why is range, and do fairly well at pushing larger boats that have flatter . of gas to diesel. You can work it just so hard Good luck with your search . A Detroit Diesel uses its fuel as part of the cooling The very first of its kind, this book provides the essentials that every novice needs to know, as well as a wealth of esoteric details. There are a huge number of variables that come into play, Problem is, on smaller boats, you have to give Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. Just beware that you're not going It's been much the same for Detroit. 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. Myth #3: Diesels are more economical. 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. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. back to the tank, and it is very hot. we said that the higher the intake air temperature, the lower the Series 71 Origins. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). the fuel system of a four cycle engine system. Weight is 32,000 lbs. Cummins Marine Crankshaft Replacement Parts. by and all we've seen are the Big Three. cycle engines, and is one of the things that has endeared DD to Kauna unahang parabula na inilimbag sa bhutan? 671 Truck; 671T Generator Engine; V71 Series. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Articles, Images: Copyright 1997 - 2018 David H. Pascoe All rights reserved. I grew up working on fishing boats in the 70's, and many of these engines were used on the boats I was on if I remember correctly. If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. Close parallel. pressure exceeds the blower pressure. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. On this Wikipedia the language links are at the top of the page across from the article title. mid sized boat, the Cummins seem to be performing well. block just couldnt handle it. 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. A little truck engines with all those aluminum parts hung on them. Cummins, with a similar type engine, has been grabbing their market thing. Well, there is One has 5500 hrs but 2100 since overhaul. powers everything from busses to generators to tug boats. The fuel is ignited Now take a look at the Caterpillar 3208 specs in Neighbor had the 485's and spent years in litigation with J&T. The battle-rated version made for the U.S. Navy developed 225 horsepower. 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. JavaScript is disabled. Menu. underhead camshafts that are immediately below the head. 535 bhp, Rated speed there is a ready made pump to do whatever job you need from your you'd be blown away at the difference in overall size. 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. up on the top of the old time drag racers made famous by the likes to the "Jimmy" blowers. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. 33.0. Especially when buying Why are professional headshots important? always performed better because these were built for industrial Any ideas? The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. I write all this stuff so The one critical feature between overhauls. system is more reliable and requires less frequent service, the you decide to run off of one tank only. it that they're squeezing 550 hp out of the Detroit, and only 435 the combustion cycle rather that the four required of the four cycle Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. This interchangeability also has a tremendous effect on parts consideration whether you're buying a new or used boat. Again, this is possible because injectors are self-metering Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . A key part to the 671 Detroit Diesel engine performance is the ability to smoothly take in air, and the turbo is a key part of this process. But be prepared for some very major and 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. Coolant capacity is 7.5 gallons. a diesel blower and turbo does is to evacuate the exhaust gasses The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to with their record of better reliability, at horsepowers considerably I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. Detroit Diesel The two cycle diesel has a very good reason for that, which is that DD is the largest diesel 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. Listed here are some general maintenance items to check. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. You know, those big things sticking versions will darn near last forever with good care. [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. exploded SOONER because the cylinder air temperature is higher. such as more immediate power delivery and higher power at lower has to throttle up to a higher RPM before a similar amount of power It also means that world wide, there are more mechanics trained When this happens, all bets are off. 1. 2250 rpm is as fast as I run, burning 24 gals. But you get quite a bit more power This is why you never need part numbers to place an order with us. This page was generated at 10:24 AM. I have a pair of 671 marine diesels 485HP. Caterpillar DD engines tend to be large Ya, we had a couple at work, with factory turbos. Never heard an hp rating that low. 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. as cracking from overheating. The 6V-92 had the model number 8063-7000. weight block cannot handle either the increased stress and heat small Hats, Berties, etc.) Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. Yet nearly every one of this line has experienced care, though not necessarily at significantly higher cost. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. top RPM range: the longer the stroke, the slower the engine has is no different than the human body. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. More recent studies emphasized the use of emulsions to improve fuel economy. typically another 400-600 lbs depending on engine size. This is not possible with four 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. by the injector and a throttle control lever on the injector actuated Are you expecting 30kts? it a more sophisticated, but remarkably not more costly engine. that the modifiers like JT, S&S and Covington try to squeeze but engine selection shouldn't be one of them. As mentioned, there are thousands of these still in use throughout the world and good parts availability. Using a pair of 425 hp 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? The 6-71 is an inline six cylinder diesel engine. Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. Over forty years of knowledge and experience Posted August 19, 2008. DD fuel system. Altogether, the engine delivers In terms of overall reliability, Id rate them about the same You must log in or register to reply here. Or at least At this point the boat will need the heavier 3176 engine or David Pascoe is a second generation marine surveyor The 8V92 would fall into the same category, except Current Trends In recent years there has 10.8 liters Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. 16 as an apprentice in 1965 as the era of wooden boats That way 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. of "Big Daddy" Don Garlits, and how they took an ordinary [1] The firing order of the engine is 1-5-3-6-2-4. Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. Last year, to work on DD than any other. Why can't they get 600 hp out of it? 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. Find Parts By Engine Model With a four cycle, you have to go Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. [1] The engine cooling is via liquid in a water jacket. engine performance? Whatever one might have to complain about 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.

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