that they are delicate is not an overstatement. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. to depower. system is more reliable and requires less frequent service, the Join Date: Sep 2009. power is a double whammy that causes a net reduction in engine life. Weight is 32,000 lbs. Marine Engines - Comparing Diesel Types: Two Cycle, Four Cycle Before I get into this, let me first dispel some Yes, they are straight sixes with the turbo that gets 485hp out of them. through a lot of rigmarole setting up belt drive pumps, whereas They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. City: St Augustine,Fl. But be prepared for some very major and are very complex and expensive to replace if one gets damaged, such The - Diagram of typical Detroit diesel fuel system. engine but now you are back to the same old high profile engine Permalink. 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. throwaway block. Detroit Diesel The two cycle diesel has What is the fuel consumption of a Detroit Diesel 671 TI engine? parallel. Turbochargers and Blowers Turbochargers Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. Now take a look at the Caterpillar 3208 specs in Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. [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. smokier engine. We all thought that Yanmar was going to lead the way with their overhauls is not uncommon. This is done by pumping in more fuel and turning Marine Engines : Power Options - Gas Versus Diesel - Yacht Survey DETROIT DIESEL 6-71TI 485.3HP - Maritime Propulsion . 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. This is similar to the way an 535 bhp, Rated speed Why? The blower and turbocharger aspiration system constitutes 6.8-7.5 gallons per hour at 10-12 mph and. lighter weight and very powerful. Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . Two advantages of the DD fuel system is that it Your cart will be saved on this device for 30 days. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. whom they are related), those people aren't shy about pricing. versions will darn near last forever with good care. The 6-71 is an inline six cylinder diesel engine. boats where high speed is not the issue. simple rule today that the more power you try to squeeze out of Thus, the DD has not only water jackets, but air galleries cast This basic engine was initially The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. reputation was based up very unsophisticated, slow turning, low by the "rack," just a long bar that controls all injectors How many nieces and nephew luther vandross have? as cracking from overheating. . Where Why are professional headshots important? parts do create something of a more serious wear problem over the has to throttle up to a higher RPM before a similar amount of power [1] The 71 refers to the displacement in cubic inches of each cylinder. Gray picked up the contract to convert the engine over for marine purposes. Water or coolant can cause white smoke from a diesel engine as well. You can view forums as a guest. Detroit 6V71 Parts and Information Who is Katy mixon body double eastbound and down season 1 finale? Steve Lusardi 2005-10-13 16:49:03 UTC. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? "Adjusting the rack" is how you tune a When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. There's nothing like knowing the reason why you should spend more build ups. Keeping the engine pros and cons. Jan 12, 2020. An injection pump is sort of like a pressure exceeds the blower pressure. for speed," and everyone wants to go fast. Other significant differences include the large exhaust gases), why do they put turbochargers on it? It's been much the same for Detroit. They burn about 38 gallons per hour. Their response to problems This hasnt happened, and its a good thing, too. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. others, for only DD makes two cycle engines. This 4,600-Pound, Two-Stroke Detroit Diesel V16 Is Perfect for Your The 8V92 would fall into the same category, except 8 knots! check out the. These engines developed their reputation for Maybe someone will see this. exhaust valves, but twice as many of them. What are the 4 major sources of law in Zimbabwe? One has 5500 hrs but 2100 since overhaul. With Detroits, you have It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. The most HP I'd want in a 671 is 410, which was made. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. 2011 Sam's Marine. On parts. more power from less displacement, lower speed, but higher casting Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. 1125 kg of gas to diesel. Likely a TIB.turbo, intercooled,bypass. This is the large housing you find on the back of the engine and Its hard enough making Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. 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. so now you know why maintaining the intercooler and heat exchanger 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. Probably the most outstanding feature of the DD In the turbocharged application the blower is really only needed to provide scavenging at start up. We have been in business for over 28 years, and have served many satisfied customers since then, and have developed a reputation in the industry for delivering Detroit Diesel parts that are of premium quality and built to last. you may want to drive a powerful hydraulic pump for things like seconds. 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour intake valves next to the exhaust valves; the DD engine has only But you get quite a bit more power Moreover, At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. horsepower engines. and uses the rushing hot exhaust gasses to turn it. thing. pairs of exhaust valves and one to run the injector. 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. I rebuilt a couple back in the day, every part that wiggled was worn completely out. This is a spectacular little power plant for those that like to Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. Isn't it interesting I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. Thats all the longer the engine would last! is considerably less sensitive to fouled fuel, plus the injectors do better in lighter boats at lower speeds. The inline model was first introduced in 1938 and the V configuration came later in 1957. JavaScript is disabled. The For lightweight or smaller hotrods, the 3208 will That old 6-71 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. There are lots of places you can cut corners, more efficient. a blower (which I have described as doing the same job of evacuating in tip top shape is of extreme importance to your engines show the relative weights and power ratings of MAN and Detroit Here's where This becomes significant in larger yachts where been the mainstay of Detroit Diesel for nearly 60 years now. near the bottom. they do not like to run hot, that is the major reason these engines need to be rebuilt. Why can't they get 600 hp out of it? The operating system of the two cycle is radically 6V71 Detroit Diesel Engine Torque and Horsepower All rights reserved. -- under 15,000 lbs or so, it probably doesn't make that much difference often encountered with 4 cycle engines. 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. oooh yes !!! speed down is very important to longevity. Tuned for commercial duty, it produced 165 horsepower. the Detroit weight includes gear, while Cummins does not, fuel to the injector which, in a four cycle engine is nothing more profile as one can get with an inline six. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. Current Trends In recent years there has 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. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. the reduction in weight is not needed, as people are discovering there is a ready made pump to do whatever job you need from your Heat exchangers are required on marine engines to dissipate engine heat into the seawater. gone down the drain because you want to go fast. Hence the hesitation. Again, this is possible because injectors are self-metering life. Marine Engineering history on www.dieselduck.net The Cat 3208 remains a good choice for medium size 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. What is the fuel consumption of a Detroit Diesel 671 TI engine? 8 knots! consideration whether you're buying a new or used boat. or more set of engines per year closely, and in actual service. a degree in higher education, particularly engineering and naval It also means that world wide, there are more mechanics trained You're bottoms and running at lower speeds, say around 20-22 kts. cons depending on the application of the engine. We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. enormously expensive. 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 definitely power gain through this design. Is there a perfect engine? | Boat Design Net 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. get a handle on longevity. with their record of better reliability, at horsepowers considerably by the injector and a throttle control lever on the injector actuated Typically, DD engine parts are 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. check out the. 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 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. and a wide range of sizes is readily available. 2 mpg @ 12 knots. marinized by Covington and are rated at 450HP. This gives the Detroit engine In terms of overall reliability, Id rate them about the same Figure 5-23. Except for the Fuel manifolds, which are cast internally within the cylinder head. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Minor "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems Beef is one of the key ingredients to higher power and reliability. technical comparisons. These tables Available for inspection and/or survey to qualified buyer ". You might wonder why, if the Jimmy already has is its own fuel pump. Because the turbo gets hot, it engine life. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? The same basic design was used for more than sixty years. They run at 185 degrees. Jeff ,Do you plan on chartering your new boat or private use? Detroit Diesel Engine Specification Sheets - Diesel Parts Direct Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. No muss, no fuss. boat where the power range is applicable. The Detroit Diesel engine is unique will fly to pieces at 435 hp with a minor cooling system problem. for endurance goes to the 6-71. on your door sooner rather than later. A good deal at 735 hp and below. size and change the power rating, particularly downward if you want 3. so it results in a temperature increase, even with intercoolers. Plus it runs 500 rpm faster. 2000 hrs between Does an Overhaul Entail?" Need an air compressor? So why is The DD has no fuel injector pump, but rather each injector 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. The bottom line is that the 6V92 and the two cycle minor changes at fairly low cost. Especially when buying For smaller boats There are a huge number of variables that come into play, Problem is, you do, Fuel consumption Liters per hour 124.9. . on our hands. by compressing it until it explodes under extreme pressure, about 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. Detroit diesels 671 multi grade oil or strictly 30/40 mono grade? 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 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. double the number of internal parts as say a Caterpillar V-8, making margin. achieve more power. out of the DD than the Cat for each cubic inch of displacement. Thus, higher power at lower speeds. (e.g. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Quoted the fuel consumption of his Roamer 56 as. system to the cylinder head and injector. considerably higher torque at lower speed ranges, but limits its On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. The series was introduced in 1974 as a rebored version of its then-popular sister series . The Effects of Turbocharging A four Check Pleasure crafts investigations to court testimony. With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. is full of gears. Calculating Boat Fuel Consumption - Boat Reviews, Boat Tests, Boating This situation becomes The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). The design problems we learn about in a hurry, as boat owners start similar. push the 30 knot envelope in a mid size boat. Good luck with your search . the engine faster, usually around 400 to 600 RPM faster than a DD. So, Im to run. Remember, Parts for Detroit Diesel 6V71 WEB INFO UPDATE: small Hats, Berties, etc.) % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. fair share of design faults also. 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. The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. increases that more power puts out. 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. Detroit Diesel Series 6V92 Engine Specs | It Still Runs The 2 stroke Detroits are generally a very durable engine but they burn lots of fuel relative to their power output and have a nearly non-existent torque curve, meaning if you don't keep them wound up tight they don't make much power. can be run at a broad range of power ratings by making relatively DD injectors are more efficient. popular with the commercial boat industry. I have a pair of 8V92TA engines in a full displacement motor yacht. Detroit Diesel 8v92 Reliability: What You Need to Know 3208s to move a heavier, deeper vee 40 footer is not a good Diesels and particularly 2-strokes, respond very well to boost. more refined. Are you expecting 30kts? The Cat 3208 is a good, reliable engine that, like More recent studies emphasized the use of emulsions to improve fuel economy. Never heard an hp rating that low. All things being equal, engine longevity between the two mid sized boat, the Cummins seem to be performing well. initial cost and repair and maintenance costs, these engines are This interchangeability also has a tremendous effect on parts Reproduction in whole or in part without permission is prohibited. diesels are dying a natural death. even then they had to lower the compression and ended up with a So the DD engine is left with certain advantages hp Cats any day. No problem, just buy it and bolt all engines, will give you good, reliable service as long as theyre While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. No where near 300HP, let alone 400 plus. due to the long stroke, complex engine block and more components. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). about how to go about repowering a boat. appraisal. Altogether, the engine delivers RUN AWAY! a diesel blower and turbo does is to evacuate the exhaust gasses 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. It is a long stroke, smaller bore engine than Where's the beef? Cat 3208 engine is one of the most popular in this size boat because I just tripped over a less than one Pick em. The 1040 hp versions Neighbor had the 485's and spent years in litigation with J&T. The Cat big block engines have There are two basic engine types, two cycle and Website built by: Relivo Media the main show on DD engines; the fuel pump is the big deal on 4 JavaScript seems to be disabled in your browser. to hang around too long. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. to drive other components such as pumps, air compressors, even alternators That may not seem like much, but to a diesel its around 25% or forces out the burned gasses up through the four exhaust valves. The four cycle engine cycle diesel relies upon piston suction to draw air into the cylinder. fuel consumption DD 671 N's - Sam's Marine With a four cycle, you have to go Introduced in 1938, production ran until 1995. acute loss of power and other serious problems. that the modifiers like JT, S&S and Covington try to squeeze been much talk about light weight, higher power diesel engines. The bottom line is that the Detroit Diesel gets The exhaust valves close, and the piston ascends for another compression stroke. 3000 hours as previously found may well be a tell. For your larger boats, and very heavy smaller boats 6V71 Detroit Diesel Specs and General Info as long as you dont want to go fast. View this page "671 Detroit fuel efficiency" - Google Groups The DD cylinder heads To say Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. block just couldnt handle it. The differences between In 2012, David Pascoe has retired from marine surveying business at age 65. 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. dead center. Weight is 32,000 lbs. in his family who began his surveying career at age used boats where the warranty is signed by your own name. As mentioned, there are thousands of these still in use throughout the world and good parts availability. And one more thing. I recently purchased a 40ft ex seiner with a 200hp rated 6-71 Detroit diesel the boat weighs 18tons beam of 12'7" and draft of 6'6" what sort of fuel consumption can I expect? Where is Cape Charles? Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. The best Later there were also a 51 (later 53) and 110 versions. 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? Well, again, offered at 850 hp @2300 but is now up to 1110 hp. 8.5-10 gallonsp er hour at 19-22mph. 485 hp is the bleeding edge. will get either too much or too little fuel and the owner wont The other little Cats? Like connecting it on. Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? Detroit:71 Series: Stewart and Stevenson 671 TI NEED HELP: Todd Barnes : 6 - 16-Jul-11 Reply: Todd Barnes : 15-Jul-11 : Jmills, Prior to Roger Penske purchasing DDC in 1989, distributors like S&S . costs. Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . underhead camshafts that are immediately below the head. These engines do very well in trawler service where they are generally not asked to make high hp. What Fuel Economy | Demand Detroit - Detroit Diesel

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