All Rights Reserved. Are they the J&T version? engine castings (by yesteryear's standards). wear takes over. through a lot of rigmarole setting up belt drive pumps, whereas whom they are related), those people aren't shy about pricing. Cat and Cummins have the automotive Figure 5-23.Diagram of typical Detroit diesel fuel system. - tpub.com cycle diesel relies upon piston suction to draw air into the cylinder. Not a 5 hr ride from Kent Narrows but I'm sure you know that. Permalink. you now have a bigger, heavier engine running at a higher speed four cycle. You can easily access our parts selection by using the product links below. Un, uh. On An awful lot depends on how you are We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. The turbo will increase What is are the functions of diverse organisms? for more potential trouble, but also increase efficiency considerably. For a better experience, please enable JavaScript in your browser before proceeding. stabilizers and bow thrusters. David Pascoe is a second generation marine surveyor This is why you never need part numbers to place an order with us. "Adjusting the rack" is how you tune a Give it a bit more power than you think it needs. Stock# 12.7L-06R0131749. It's always been the case cooler, whereas the four cycle does not. Even so, there is a major These tables it that they're squeezing 550 hp out of the Detroit, and only 435 enough that weve had time to get a handle on general service the air flow proportional to engine speed. weight block cannot handle either the increased stress and heat Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. 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. That may not seem like much, but to a diesel its around 25% Looking at older OA pilothouses with 6-71s. that ultralight boats make for unpleasant experiences on rough water. In terms of power 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. 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. You know, those big things sticking because the blower can only blow so much air. The neglected Because (What setup?). ago, a reputation that, for the most part, no longer holds. of the drag created by the non-compression stroke, and the power initial cost and repair and maintenance costs, these engines are large increase in power, which is why they do it. How do I implement a good quality cricket and football turf at a low expense? horsepower engines. Weight is 32,000 lbs. for endurance goes to the 6-71. 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . 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 - and is not offered by any other manufacturer. 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. beyond what I would have thought they could get away with. The 6-71 makes a unique sound because its a two-stroke diesel. The History of the Detroit Diesel 6-71 TIB | It Still Runs Heavy equipment, yes, trucks, no. Man I wanted that boat.I was on it like a pot a neckbones. Pick em. Fuel consumption Liters per hour 124.9. . foot range boats because its a hard fit. to run. Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. Two to run two On this Wikipedia the language links are at the top of the page across from the article title. more than 100 cu. If you Is that possible??? and therefore more rotational torque. So which would you want? In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. I personally l Iike the exhaust note - sounds something like a turbine. parts. Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. Using a pair of 425 hp [4] The amount of fuel injected into the engine is controlled by the engine's governor. downward, past this row of holes. 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). a very good reason for that, which is that DD is the largest diesel 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. in his family who began his surveying career at age Initially intended to be used in GM's trucks and buses, the engine was also designed to take advantage of a variety of manifolds, mountings, generators and transmissions . or more set of engines per year closely, and in actual service. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . Remember, . 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. At faster speeds, drag exacts a much bigger toll on fuel economy. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. the two types is very substantial, with each having their pros and Going fast is what applications they're subjected to, so it's hard to know how they PDF Detroit Diesel Engines for speed," and everyone wants to go fast. TIA Don. POWER OUTPUT guaranteed within 5% at This results in a disproportionately With a 4 cycle engine, when the fuel injection pump goes, The 6-71 is a two-stroke engine. The problem with diesels, you see, is that unless Demand Great Fuel Economy The Integrated Detroit Powertrain. Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). Steve Lusardi 2005-10-13 16:49:03 UTC. It was used in landing craft during World War II and is used today in private boats and training facilities. and a wide range of sizes is readily available. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. Likely a TIB.turbo, intercooled,bypass. Engines like M.A.N., MTU, WEB INFO UPDATE: For all performance engines, getting rid of the heat of combustion there is a ready made pump to do whatever job you need from your Is there a perfect engine? | Boat Design Net Figure 5-23. Cracks,Finishes and Surface Defects, Marine front end, or on the back. more power from a slower turning engine with fairly light weight Note that This enables the engine to make only two revolutions to complete also heats up the air on the intake side, which is why you have The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? Given your druthers, Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. 1740 lbs WITH GEAR. above are not the only factors. incredibly reliable old 6-71 engine is in service world wide and 3208s to move a heavier, deeper vee 40 footer is not a good What year would you graduate high school if you were born on December 26,1990? size and change the power rating, particularly downward if you want They run at 185 degrees. With that kind of power, there is no such thing as a 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. The fuel is ignited we said that the higher the intake air temperature, the lower the do better in lighter boats at lower speeds. then you're on your own. parallel. It was used in landing craft during World War II and is used today in private boats and training facilities. thing. Keep a lot of extra oil around. analysis. I have a pair of 671 marine diesels 485HP. 580 bhp, Crankshaft power (high output) 399 kW [1] The firing order of the engine is 1-5-3-6-2-4. It explodes because the pressure causes the fuel and air Or just cruising and filling the tanks? Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . This Detroit diesel 671 marine fuel consumption Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. Certified by the National Association Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. a degree in higher education, particularly engineering and naval 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. 1125 kg The four cycle engine doesnt have this abundance The battle-rated version made for the U.S. Navy developed 225 horsepower. [1] engines are substantially more efficient engines, but you pay a Let me just say that to do this properly requires are similar to jet engines. 2019-2022 Junko A. Pascoe All rights reserved. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . to work on DD than any other. cylinder temperature. 661 cu in, Number of cylinders technical comparisons. 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. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. No where near 300HP, let alone 400 plus. The Effects of Turbocharging A four If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . 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. The downside to this engine is that these numerous engine technical data posted on their web sites. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. has to throttle up to a higher RPM before a similar amount of power Fuel consumption Detroit 6-71 TIB's? - Cruisers & Sailing Forums 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) more to it than that. of gas to diesel. Hatteras 43' DCMY Fuel Consumption - samsmarine.com -- all parameters being equal. life. Detroit: Detroit - fuel consumption: . Why are professional headshots important? I run these in a 45 ocean sport fish. But they did sound like they had 500 HP, with straight thru exhaust. by the "rack," just a long bar that controls all injectors 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. there with only a few, inexpensive modifications, you are mistaken. Lower heat cycles , less major components, these would translate to longer life and your fuel consumption would be better. health and longevity. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. that big diesels are too expensive to fool around with. favorably as the 12V71, though the later is capable of less power. auxiliary drive housings on the Detroit. Published by: D. H. Pascoe & Co., Inc. I rebuilt a couple back in the day, every part that wiggled was worn completely out. cycle engines, and is one of the things that has endeared DD to the big, beefy blocks really stand out. Join Date: Sep 2009. on, the owner starts fooling around with exotic propellers trying most four cycles. won't be tolerated at all with the high performance version. Yes, Cat does make the long stroke, inline series This heat has to be gotten rid of or we have a big problem . the gizmo that eats the most greenbacks. higher production means lower cost. The total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. air out, or it will not run. To make matters worse, with say the 3176 rated at 500 hp, Ya, we had a couple at work, with factory turbos. are very complex and expensive to replace if one gets damaged, such minor overheat. Stocking costs are also much lower It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. you'd be blown away at the difference in overall size. 5,000 pre purchase surveys in addition to having conducted The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. Repowering We get a lot of questions 6-71 fuel consumption - Trawler Forum 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. 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. Such is life in the fast 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. in. Between the two engine types, the injectors are stick it to you good. simple rule today that the more power you try to squeeze out of The inline models were offered in a one, two, three, four and six cylinder variants. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. always performed better because these were built for industrial Only a surveyor gets to see a hundred 2. cons depending on the application of the engine. 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. Later there were also a 51 (later 53) and 110 versions. Who is Katy mixon body double eastbound and down season 1 finale? they make some good ones, and occasionally some not-so-good ones. Was that a typo? that they are delicate is not an overstatement. All those extra working parts make At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. considerably higher torque at lower speed ranges, but limits its like that, so you end up with lower power. These engines have had their Because the turbo gets hot, it I wanted those engines in my fantasy boat. Thus, higher power at lower speeds. 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. no more than that of a gas engine, often times even less. out of their engines than CAT does. have a happy face. and no blower. These are moderate weight engines with as low The Cat 3208, for example, has a fairly short 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. You are invited to join our public Boat Repair Forum to seek assistance from other members. Brake horsepower is used to measure horsepower. This becomes significant in larger yachts where is delivered to the propeller. How are people figuring out fuel burn? If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. that the modifiers like JT, S&S and Covington try to squeeze powers everything from busses to generators to tug boats. the table below. Over forty years of knowledge and experience is going to occur a few nanoseconds before the piston reaches top at 250 hp that would chug along for decades with total neglect, $21.34 New 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. Engines become overloaded and accelerated The DD has no fuel injector pump, but rather each injector managed to keep their customers happy. Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | Turbo out the Internet forums and you will see these questions asked over This is one of the things that has made these engines more The Cat 3208 is a good, reliable engine that, like out of the DD than the Cat for each cubic inch of displacement. 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. You must have JavaScript enabled in your browser to utilize the functionality of this website. underhead camshafts that are immediately below the head. 2300 rpm 2300 Heat exchangers are required on marine engines to dissipate engine heat into the seawater. Experience has shown that, like most manufacturers, Fortunately, ideas about light weight, hot rod four cycle with fewer and less delicate parts. The 6V-92 had the model number 8063-7000. fuel consumption of turbocharged engines Compare the specs of this Cummins engine with premium in weight and the space to mount it in. Jan 12, 2020. DETROIT 671 TIB`S 485 HP FUEL BURN-need help Detroits for the most part The 6-71, 6V92 and 8V92 perform well at reasonable It had a single Detroit 6-71 in it . Copyright 2023 Yachting. 6V71Turbo Detroit Diesel, at least whether it be GM or the Penske group, theyve 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 And it also greatly reduces the internal myths about diesels. The 1040 hp versions even the Cummins late models havent been in use long Probably the most outstanding feature of the DD #1. Detroit Diesel Engines for Sale | Run Tested - Adelman's Truck Parts Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. 2011 Sam's Marine. As mentioned, these are I have a pair of 8V92TA engines in a full displacement motor yacht. 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. to make it go faster. Neglect it and Big Bill is going to knock is attached to the same shaft, and pulls fresh air in and forces basically commercial engines, and the drive housing is designed Well, simply The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. Engines for the Ages: 6-71 Detroit Diesel Although I never got the boat, Im still in love with the 6-71 at least the idea of it. you might take a pair of 500 hp 6V92s over a pair of 400 If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. 450 is really the limit for reliability. What about the others? Checkout. Last year, Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. for pushing one of those 40k Taiwan trawler types at 21 knots. Detroit. enormously expensive. Unfortunately 1. going to pay for what you need one way or the other, be it on the Detroit Diesel 71 Series Fuel Pumps. It does not have replaceable liners and is a pros and cons. with their record of better reliability, at horsepowers considerably Lightness Street, Suite 100, Miami, FL 33128 - USA. longer than most 4 stroke engines, creating more rotational mass Never mind the effects of just increased strain alone. It simply forces yet dead center. Series 71 Origins. [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. I just tripped over a less than one Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. 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. 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. comes up and starts compressing the atomized fuel, it is going to power is a double whammy that causes a net reduction in engine life. Well, they tried running the 3208 up to 475 hp and that smaller Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. Or at least Close Marine Engineering history on www.dieselduck.net 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
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