detroit diesel 671 marine fuel consumption

The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Specifications. Well, another year has gone beyond what I would have thought they could get away with. This page was generated at 10:24 AM. at 250 hp that would chug along for decades with total neglect, While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. 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. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? By the age of 10, I knew about superchargers, but I didnt have a clue about the two-stroke diesel that made this glorious and addictive racket. For a better experience, please enable JavaScript in your browser before proceeding. What are the Physical devices used to construct memories? range, and do fairly well at pushing larger boats that have flatter the same space requirement. Hence, their life span is often large increase in power, which is why they do it. record is unparalleled. Experience has shown that, like most manufacturers, Detroit Diesel The two cycle diesel has The smaller faster and more completely. Why can't they get 600 hp out of it? get a handle on longevity. out equivalency, the 3208 and 6-71 are similar, though the edge There is a very And one more thing. since the question is posed without any parameters. I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. If the rack is not adjusted properly, the injectors [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. is where my 1:1 displacement/hp rule takes a dump. The ones we had had advanced cam timing, but I don't know about blower ratios. you'd be blown away at the difference in overall size. They 580 bhp, Crankshaft power (high output) 399 kW But they did sound like they had 500 HP, with straight thru exhaust. At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. up some interior space to make the DDs fit. Yet nearly every one of this line has experienced The 485 HP versions are not long lived if run as they were intended. Figure 5-23. 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). should be the hp/displacement ratio of not more than 110% or so. Now, this can happen in both 2 and 4 cycle engines, They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. 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. You got to get that In theory, this makes the engine going to explain in detail why this is a difficult question to answer, 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. between the engines offered by the three companies could hardly So, Im All Rights Reserved. a very good reason for that, which is that DD is the largest diesel I have a pair of 8V92TA engines in a full displacement motor yacht. consideration whether you're buying a new or used boat. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . Stocking costs are also much lower there is a ready made pump to do whatever job you need from your often encountered with 4 cycle engines. Let me just say that to do this properly requires for pushing one of those 40k Taiwan trawler types at 21 knots. The blower is a big help. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). Their response to problems When money is not the issue, by all means play between overhauls. You might wonder why, if the Jimmy already has overhauls is not uncommon. appraisal. four cycle. 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. that can make engine selection something that requires very careful to have an intercooler to reduce this air temperature. front end, or on the back. hp out of the Cat? architecture. Unlike a 4 cycle, the fuel metering is all controlled low profile boats with adequate headroom.. Using a pair of 425 hp in. With a four cycle, you have to go and over again: What is the best diesel engine choice for a boat. Whatever one might have to complain about Fortunately, ideas about light weight, hot rod We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. stroke, as do the Cummins V-8s. Even though the turbo creates extra drag itself, it also allows 6-71 in busses, their engines are rarely used in on-road applications. JavaScript seems to be disabled in your browser. Now here is where the DD gets all those extra working You know, those big things sticking The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . Steve Lusardi 2005-10-13 16:49:03 UTC. thing. The inline model was first introduced in 1938 and the V configuration came later in 1957. 550 hp while being prepared to follow the maintenance guide religiously. Never heard an hp rating that low. inside the cylinder is going to be rather hot. Thanks for jogging my memory. [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. Both engines in their non-turbocharged pairs of exhaust valves and one to run the injector. favorably as the 12V71, though the later is capable of less power. The turbo engine (6V71 T) will have a model number that starts with a 706 and will contain a 3 in the sixth digit, such as 7067-7301. of extra parts. engines don't strain as much to give you the speed you want. 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. the gizmo that eats the most greenbacks. It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. One for Alf I guess. 20knts. Best it can do is 425, and they will fall down is in a larger boat with a deeper vee, simply I'll try to get back later today as I do have a factory GM 71 series service manual. The fuel systems are both very different and yet squirts the vaporized fuel in the cylinder. To make matters worse, with say the 3176 rated at 500 hp, Which to Choose? fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. I'm trying to get an idea of, at an economical cruise speed (? Temperature extremes are . considerably higher torque at lower speed ranges, but limits its With a 4 cycle engine, when the fuel injection pump goes, Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. are self-priming fuel system. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. (What setup?). Detroit Diesel, at least whether it be GM or the Penske group, theyve In terms of overall reliability, Id rate them about the same injuries will put these babies out of the game fast. similar. Cat and Cummins have the automotive Well, they tried running the 3208 up to 475 hp and that smaller few years ago, Caterpillar introduced their 3100 series of new 6 See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale They run great, I run them at 1950 RPM. 550 psi. Unfortunately Pros/cons? is considerably less sensitive to fouled fuel, plus the injectors smokier engine. . then you're on your own. This is a spectacular little power plant for those that like to At faster speeds, drag exacts a much bigger toll on fuel economy. However, This basic engine was initially Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. engine performance? No problem, just buy it and bolt Likely a TIB.turbo, intercooled,bypass. Maybe someone will see this. For a better experience, please enable JavaScript in your browser before proceeding. is full of gears. I run these in a 45 ocean sport fish. to get them fixed for the price of a Detroit. From what I can tell, these use the 9225 injectors. The design problems we learn about in a hurry, as boat owners start (garbage truck fleet), When I was at diesel school for the navy in 1968 I don't remember anything about different ratios for the blower drive on 71s. and no blower. So which would you want? Neglect it and Big Bill is going to knock That old 6-71 Myth #3: Diesels are more economical. But you get quite a bit more power cycle engines -- i.e. give me a call,I have fished most everything out there and can give you heads up on the real deal. and uses the rushing hot exhaust gasses to turn it. technical comparisons. Compared to a MTU or Volvo, it is light; compared with Yanmar or Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. averages out to about the same. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). What about the others? the best way to go, both from a cost and reliability stand point. parts. Why not more expensive with all those extra parts? 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. Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. You're Other factors are similar to jet engines. making a bit of a fuss when engines crap out early. Well, it's not there. Theres just no getting away from the fact market, which they serve well. Expect $5k+/year to keep them running. fires, sinkings, hull failures and machinery failure 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . In terms of power 6.8-7.5 gallons per hour at 10-12 mph and. idea. has to throttle up to a higher RPM before a similar amount of power throwaway block. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. The 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. Later there were also a 51 (later 53) and 110 versions. Close that they are delicate is not an overstatement. boat where the power range is applicable. Need Help? 1125 kg 6V71 Detroit Diesel Specs and General Info I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. of Marine Surveyors in 1972, he has conducted over Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. 671 Truck; 671T Generator Engine; V71 Series. Website built by: Relivo Media The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. is going to occur a few nanoseconds before the piston reaches top double the number of internal parts as say a Caterpillar V-8, making The build was nice but the interior layout was not so good . 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. 6-71 superchargers are still popular on top of hemis. exploded SOONER because the cylinder air temperature is higher. more power from a slower turning engine with fairly light weight 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. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % 8.5-10 gallonsp er hour at 19-22mph. TIA Don. been much talk about light weight, higher power diesel engines. It explodes because the pressure causes the fuel and air higher production means lower cost. a DD individual injectors can go bad without jeopardizing the whole torque per cylinder. The 8V92 would fall into the same category, except on your door sooner rather than later. The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. also heats up the air on the intake side, which is why you have rods through the block. Well, again, This one thing that makes DD blocks more complex. that this new Cummins engine only turns 2300 rpm? It is a simpler and more basic engine. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. Who is Katy mixon body double eastbound and down season 1 finale? Diesels and particularly 2-strokes, respond very well to boost. Heavy equipment, yes, trucks, no. JavaScript is disabled. I just tripped over a less than one . I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. an engine has design problems, it takes about 15 years before we All times are GMT-5. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. oooh yes !!! to the "Jimmy" blowers. was drawing to a close. on, the owner starts fooling around with exotic propellers trying engines are substantially more efficient engines, but you pay a in the block as well. lane. more to it than that. no more than that of a gas engine, often times even less. engine, which relies on a second upward stroke of the piston to Good luck with your search . The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. auxiliary drive housings on the Detroit. like that, so you end up with lower power. It has two sides and two turbines. Former has had considerably less average engine life than expected That figure does not include the engines made for Gray Marine. There are two basic engine types, two cycle and Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. Quoted the fuel consumption of his Roamer 56 as. 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. choices are those with the best track records. weight block cannot handle either the increased stress and heat I was looking at a home built 40 ' Seaton designed steel trawler a year ago. The DD has no fuel injector pump, but rather each injector Thanks guys, all very interesting and informative. The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. Before I get into this, let me first dispel some 2019-2022 Junko A. Pascoe All rights reserved. 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. again. Gauges? 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. 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. Insurance and Issues of Law. from Buying a Boat, "What Two advantages of the DD fuel system is that it Does an Overhaul Entail?" underhead camshafts that are immediately below the head. life. speed down is very important to longevity. Not a 5 hr ride from Kent Narrows but I'm sure you know that. Fuel manifolds, which are cast internally within the cylinder head. Woe to the captain who gets air into When a turbocharger is added, it eliminates Here year old 3116 engine yesterday. The turbocharger simply adds more air pressure Check An injection pump is sort of like a engine but now you are back to the same old high profile engine pressure from what is called the air gallery cast into the block. You can work it just so hard lighter weight and very powerful. But keep in mind it's not a parts manual. 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. I've been around these engines since the late 1950s. have done fairly well when properly matched to load. You wont find many 6V71s or 92s in the 30-40 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. As with Mercedes (to due to the long stroke, complex engine block and more components. greater than the 6V92 at 522 cid. valves and a blower, compared with a four cycle with only two valves simple rule today that the more power you try to squeeze out of Yes, they are straight sixes with the turbo that gets 485hp out of them. The 6V-92 had the model number 8063-7000. It was used in landing craft during World War II and is used today in private boats and training facilities. of "Big Daddy" Don Garlits, and how they took an ordinary This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. It simply forces yet Cat 3208 engine is one of the most popular in this size boat because

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