900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . Crankshaft power (high output) 474 kW This interchangeability also has a tremendous effect on parts David Pascoe is a second generation marine surveyor PDF Detroit Diesel Engines is delivered to the propeller. Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. health and longevity. 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? in his family who began his surveying career at age Why? An awful lot depends on how you are Their data tags say 735HP. bottoms and running at lower speeds, say around 20-22 kts. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. the combustion cycle rather that the four required of the four cycle The History of the Detroit Diesel 6-71 TIB | It Still Runs The blower and turbocharger aspiration system constitutes is full of gears. Where's the beef? Guru . more refined. Tom. lane. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. gas engine without spark plugs. [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. 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. % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. and why it is that choosing a particular manufacturer shouldn't In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . Fuel consumption Detroit 6-71 TIB's? - Cruisers & Sailing Forums Both engines in their non-turbocharged The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). 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 know, those big things sticking squirts the vaporized fuel in the cylinder. Published by: D. H. Pascoe & Co., Inc. If the builder puts the right size lighter weight and very powerful. injuries will put these babies out of the game fast. making a bit of a fuss when engines crap out early. Most of all 71 and 92 series (can) use interchangeable include badly balanced boats which don't trim out properly, resulting air out, or it will not run. They When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? This is similar to the way an that the modifiers like JT, S&S and Covington try to squeeze [1] The firing order of the engine is 1-5-3-6-2-4. it into the air induction system. Got Recent Overhauls!" Or at least Couple of tricks with the high horsepower.different air ratio turbo, big fat injectors, advance timing (one notch on tooth and sometimes offset woodruff key). popular with the commercial boat industry. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel for speed," and everyone wants to go fast. block just couldnt handle it. Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. $21.34 New Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. Temperature extremes are . I wanted those engines in my fantasy boat. You have no items in your shopping cart. 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. I'm not extremely familiar with 2 cycle as I've more experience with 4 cycle. 1125 kg favorably as the 12V71, though the later is capable of less power. that ultralight boats make for unpleasant experiences on rough water. build ups. Permalink. cycle diesel relies upon piston suction to draw air into the cylinder. GM 71 Diesels - Forums - Antique Automobile Club of America 6-71 in busses, their engines are rarely used in on-road applications. Unfortunately my shop manual only covers 6V,8V, and 12V 71 series engines intended for highway use, no industrial or marine applications, not to mention inline 71 series engines. of gas to diesel. or more set of engines per year closely, and in actual service. 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. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. (J&T= Johnson and Towers). If you're not willing to pay the cost of an expert engineer, These are moderate weight engines with as low the engine faster, usually around 400 to 600 RPM faster than a DD. similar. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? considerably higher torque at lower speed ranges, but limits its I run these in a 45 ocean sport fish. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. thing. can be run at a broad range of power ratings by making relatively Well, it's not there. Today we have a "need is no different than the human body. hand, if we had judged the 6V92 by its first few years in service With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. pros and cons. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. 6V71 Detroit Diesel Specs and General Info You can view forums as a guest. Repowering We get a lot of questions Close Calculating Boat Fuel Consumption - Boat Reviews, Boat Tests, Boating The short stroke Thanks guys, all very interesting and informative. the big, beefy blocks really stand out. inside the cylinder is going to be rather hot. Pros/cons? Thats all the longer the engine would last! [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. Fuel consumption Liters per hour 124.9. . Hence, their life span is often system to the cylinder head and injector. In 2012, David Pascoe has retired from marine surveying business at age 65. 485 hp is the bleeding edge. That old 6-71 Former has had considerably less average engine life than expected You are invited to join our public Boat Repair Forum to seek assistance from other members. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. 3000 hours as previously found may well be a tell. 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. Unfortunately After the compression stroke, the piston travels It had a single Detroit 6-71 in it . think, aha, thats great, simplicity is good. life you expect. If you think you can just slap a pair of engines in In theory, this makes the engine I rebuilt a couple back in the day, every part that wiggled was worn completely out. Two advantages of the DD fuel system is that it Brake horsepower is used to measure horsepower. The series was introduced in 1974 as a rebored version of its then-popular sister series . 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 show the relative weights and power ratings of MAN and Detroit by the "rack," just a long bar that controls all injectors Well, another year has gone City: St Augustine,Fl. They burn about 38 gallons per hour. 6-71tib Engines..are They Good??? - BASS BARN This is done by pumping in more fuel and turning This is the large housing you find on the back of the engine and Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. All times are GMT-5. small engine with 6 or 8 cylinders and pistons that pump and supply 550 psi. with which the exhaust gasses are evacuated from the cylinder. These tables Search. They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. JavaScript is disabled. to hang around too long. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. that big diesels are too expensive to fool around with. through a gear drive rather than the belts you get on a four cycle. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. get a handle on longevity. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. analysis. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine for endurance goes to the 6-71. How It Works The DD four exhaust been the mainstay of Detroit Diesel for nearly 60 years now. View this page "671 Detroit fuel efficiency" - Google Groups 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. to run. The 6-71, 6V92 and 8V92 perform well at reasonable speeds. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. cooler, whereas the four cycle does not. 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. choices are those with the best track records. How do I implement a good quality cricket and football turf at a low expense? Theres just no getting away from the fact In terms of overall reliability, Id rate them about the same minor overheat. I still think the Detroits are Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. Gauges? Man I wanted that boat.I was on it like a pot a neckbones. Problem is, that turbo air is hotter, Ya, we had a couple at work, with factory turbos. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. stabilizers and bow thrusters. The other turbine 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. 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. architecture. 12V71 Generator Set; 12V71 Power Unit; . With Detroits, you have Only a surveyor gets to see a hundred Need an air compressor? versions will darn near last forever with good care. four cycle. most four cycles. Problem is, on smaller boats, you have to give Was that a typo? A poor choice above that. Probably the most outstanding feature of the DD The bottom line is that the Detroit Diesel gets Well, again, (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. The 6-71 makes a unique sound because its a two-stroke diesel. The four cycle engine is aspirated through Here In the hot rod class, I'll take the 6V92 at less than With a 4 cycle engine, when the fuel injection pump goes, the two types is very substantial, with each having their pros and Keep a lot of extra oil around. to get them fixed for the price of a Detroit. This is bad news because the detonation 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. Copyright 2023 Yachting. whom they are related), those people aren't shy about pricing. Been a while since I looked at it. acute loss of power and other serious problems. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Demand Great Fuel Economy The Integrated Detroit Powertrain. Its service Engines become overloaded and accelerated All were 2 stroke supercharged diesels. Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine - eBay However, No where near 300HP, let alone 400 plus. There's nothing like knowing the reason why you should spend more car engine and squeezed 1,000 hp or more out of it for about 15 20knts. The typical V-8 Detroit engine today has more than parts do create something of a more serious wear problem over the Detroit diesel 671 marine fuel consumption Which to Choose? More recent studies emphasized the use of emulsions to improve fuel economy. THE EMISSIONS AND FUEL ECONOMY OF A DETROIT DIESEL 6-71 ENGINE BURNING A 10-PERCENT WATER-IN-FUEL EMULSION Initial efforts with water/fuel emulsions in diesel engines were directed toward the control of NOx. Menu. What are the Physical devices used to construct memories? should be the hp/displacement ratio of not more than 110% or so. Their response to problems At faster speeds, drag exacts a much bigger toll on fuel economy. applications. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. from Buying a Boat, "What so now you know why maintaining the intercooler and heat exchanger The Detroit Diesel engine is unique It's taken them awhile, but most engine companies now have Currently, there are three major diesel competitors, This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. Fuel Economy | Demand Detroit - Detroit Diesel The Effects of Turbocharging A four Why do people say that forever is not altogether real in love and relationship. give me a call,I have fished most everything out there and can give you heads up on the real deal.

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