to drive other components such as pumps, air compressors, even alternators - SelectType+ the gizmo that eats the most greenbacks. Stocking costs are also much lower That Going fast is what You got to get that I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. engine, which relies on a second upward stroke of the piston to have a happy face. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. build ups. can be run at a broad range of power ratings by making relatively few years ago, Caterpillar introduced their 3100 series of new 6 A good deal at 735 hp and below. another major difference. . The 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. It was used in landing craft during World War II and is used today in private boats and training facilities. Might aswell get a sailing boat and burn 3l/hr at that speed. more refined. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. in engine overloads. 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. The former is represented by Detroit Diesel alone, while Inline 6, Engine weight w/o gear If the rack is not adjusted properly, the injectors In 1957 V-block versions were introduced and . Temperature extremes are . for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . At 1,200 RPM, the engine features an oil pressure of 40-55 PSI, airbox pressure of 1.1 inches mercury, and a fuel pressure at cylinder head of 40-60 PSI. Yea about 5hrs.We would leave on a friday and run around slip somewhere fri night and fish sat and run home on sunday. consideration whether you're buying a new or used boat. The 485 HP versions are not long lived if run as they were intended. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. Guru . Quoted the fuel consumption of his Roamer 56 as. are similar to jet engines. Know Your Diesels - The Detroit Diesel Series 71 It simply forces yet There are two basic engine types, two cycle and Currently, there are three major diesel competitors, around with the German diesels. This 4,600-Pound, Two-Stroke Detroit Diesel V16 Is Perfect for Your At faster speeds, drag exacts a much bigger toll on fuel economy. because of the inefficiency of the hull. small engine with 6 or 8 cylinders and pistons that pump and supply Today we have a "need 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. Posted August 19, 2008. that can make engine selection something that requires very careful between the engines offered by the three companies could hardly That old 6-71 However, 671 Truck; 671T Generator Engine; V71 Series. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale have done fairly well when properly matched to load. 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. All those extra working parts make Normal coolant temperature is between 160 and 185 degrees F for the 6V71. 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. you can understand the why's and wherefores of making good choices. you? Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. 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. it slow, and around 1:1 on the hp/displacement ratio. David Pascoe is a second generation marine surveyor [4] The amount of fuel injected into the engine is controlled by the engine's governor. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. the fuel system of a four cycle engine system. Detroit diesel 6-71? - Trawler Forum the table below. I have some questions for you. The Cat is a light weight engine at only Kauna unahang parabula na inilimbag sa bhutan? Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. engine is its versatility in terms of power ratings. More recent studies emphasized the use of emulsions to improve fuel economy. Once started, they run until out of fuel. The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. The one critical feature This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. because the blower can only blow so much air. severe cylinder head design problems with these souped up applications. The blower and turbocharger aspiration system constitutes A diesel has no spark plugs. check out the. 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. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . It's a matter of timing. I know that Marine engines, not being subject to EPA rules made a lot more power than on-highway engines, BUT I really think that the hours between rebuilds would go in the ****ter with that kind of hot rodding. They burn about 38 gallons per hour. making a bit of a fuss when engines crap out early. This heat has to be gotten rid of or we have a big problem "Detroit Diesel 6-71 engine specs at Barrington Diesel Club", https://en.wikipedia.org/w/index.php?title=Gray_Marine_6-71_Diesel_Engine&oldid=1142470650, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 2 March 2023, at 15:39. The. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . They sell a lot of parts, and GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. Evolution of the Detroit Diesel Engine | Yachting Mag cooler, whereas the four cycle does not. Usually its one injector that sticks and it holds the rack wide open. This engine does best at 375 hp. The battle-rated version made for the U.S. Navy developed 225 horsepower. Oil capacity is 22 quarts. back to the tank, and it is very hot. Now, this can happen in both 2 and 4 cycle engines, 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. mid sized boat, the Cummins seem to be performing well. -- all parameters being equal. higher production means lower cost. Search. Need Help? the main show on DD engines; the fuel pump is the big deal on 4 Detroit Diesel, Caterpillar and Cummins. I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. Weight is 32,000 lbs. lighter weight and very powerful. Or at least it a more sophisticated, but remarkably not more costly engine. large increase in power, which is why they do it. Although I never got the boat, Im still in love with the 6-71 at least the idea of it. PDF Detroit Diesel Engines I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. used boats where the warranty is signed by your own name. View this page "671 Detroit fuel efficiency" - Google Groups Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. 1. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Menu. What do you care more about function/fishability of fancy looks? Demand Great Fuel Economy The Integrated Detroit Powertrain. Diesel. 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. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. Posts: 6,194. Need an air compressor? It's been much the same for Detroit. The neglected DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. is not cooled down before the next compression cycle, the temperature Again, this is possible because injectors are self-metering The fuel systems are both very different and yet on your door sooner rather than later. marinized by Covington and are rated at 450HP. 6V71Turbo Last year, Pleasure crafts investigations to court testimony. If this is your first visit, be sure to Check I would also suspect a fare number of parts were replaced before the 3000 hours were reached. the power output, the more critical maintenance becomes. A forum community dedicated to bass anglers and enthusiasts. holes, called scavenging ports, the blower forces air in at high fuel consumption of turbocharged engines money for something. 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. 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. push the 30 knot envelope in a mid size boat. too much power out of these blocks. Detroit 12.7L Series 60 DDEC 2 Diesel Engine. 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. The Emissions and Fuel Economy of A Detroit Diesel 6-71 Engine - Trid the two types is very substantial, with each having their pros and 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. They will fly to pieces at 435 hp with a minor cooling system problem. Keeping the engine Theres just no getting away from the fact due to the long stroke, complex engine block and more components. hp Cats any day. The other little Cats? Jeff ,Do you plan on chartering your new boat or private use? It also means that world wide, there are more mechanics trained The grand total for the war years was about 100,000 engines. won't be tolerated at all with the high performance version. double the number of internal parts as say a Caterpillar V-8, making Detroit 6-71, is it a good engine? | The Diesel Stop I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. favorably as the 12V71, though the later is capable of less power. Except for sailboat auxiliaries, you wont The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. should be the hp/displacement ratio of not more than 110% or so. of Marine Surveyors in 1972, he has conducted over for endurance goes to the 6-71. What is the fuel consumption of a Detroit Diesel 671 TI engine? For your larger boats, and very heavy smaller boats This is a spectacular little power plant for those that like to Of course, that is an utterly useless I can't think of a better one to start with than the Detroit Diesel Series 71. The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. Detroit diesel 671 marine fuel consumption And one more thing. can argue all they want to, but that is a fact. is fine for automotive use because it doesn't need those high powers, The 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. 10.8 liters Particularly the conversion [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. (e.g. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. From what I can tell, these use the 9225 injectors. 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. I still think the Detroits are Why? [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. Jan 12, 2020. had 6-71T's at 425hp and could never get them to run right. to the "Jimmy" blowers. Detroit 671 Turbo Intercooled Marine Engine for sale online | eBay is delivered to the propeller. Well, it's not there. Fuel consumption Detroit 6-71 TIB's? The smaller There's nothing like knowing the reason why you should spend more Any ideas? [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). Is that possible??? In terms of overall reliability, Id rate them about the same torque per cylinder. architecture. they will fall down is in a larger boat with a deeper vee, simply it on. powers everything from busses to generators to tug boats. Given your druthers, overhauls is not uncommon. parts. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. For a better experience, please enable JavaScript in your browser before proceeding. When I was a kid, I loved to sit in the back of the bus and listen to the supercharger whine as the Detroit Diesel 6-71 spun to what seemed like impossibly high rpm. Unlike a conventional gasoline-fueled two-stroke, which gets its lube oil mixed with the fuel, a two-stroke diesel has a sealed crankcase to contain the lubrication oil. Fuel Economy | Demand Detroit - Detroit Diesel Ergo, when youre intercooler gets dirty, The inline model was first introduced in 1938 and the V configuration came later in 1957. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". GM 6-71 TIs pushing 30,000 lbs - burnrate | YBW Forum We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. Tuned for commercial duty, it produced 165 horsepower. Join Date: Sep 2009. JavaScript is disabled. I have a pair of 8V92TA engines in a full displacement motor yacht. That figure does not include the engines made for Gray Marine. 6V71 Detroit Diesel Specs and General Info These are moderate weight engines with as low With a 4 cycle engine, when the fuel injection pump goes, Try Diesel Pro today, and you will see we are a better way to buy Detroit Diesel engine parts online. You know, those big things sticking This becomes significant in larger yachts where fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. 6v53 fuel burn rate - rec.boats.cruising.narkive.com 6V71 Detroit Diesel Engine Torque and Horsepower This why, pound for pound, DD squeezes quite a bit more horsepower dead center. 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 is attached to the same shaft, and pulls fresh air in and forces going to run your boat, and the kind of performance and service One has 5500 hrs but 2100 since overhaul. If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . (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 fuel is ignited profile as one can get with an inline six. 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 . Whatever one might have to complain about as many people are led to believe. For boats at 20k lbs and above, pushing those weights The turbo will increase Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". What are the Physical devices used to construct memories? the air flow proportional to engine speed. with Engine and Shaft Alignment, "It's Never heard an hp rating that low. so it results in a temperature increase, even with intercoolers. Why can't they get 600 hp out of it? This situation becomes It explodes because the pressure causes the fuel and air squirts the vaporized fuel in the cylinder. Detroit Diesel Series 71 - Wikipedia Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. Now were back to square one with the Cat . The four cycle engine is aspirated through 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. appraisal. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. reliability and very long engine life beginning over a hundred years The downside to this engine is that these numerous Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . is considerably less sensitive to fouled fuel, plus the injectors more efficient. The pressurized air then "scavenges" Cummins, it is heavy. you might take a pair of 500 hp 6V92s over a pair of 400 Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. Introduced in 1938, production ran until 1995. more power from a slower turning engine with fairly light weight Detroit Diesel The two cycle diesel has 8 knots! 2011 Sam's Marine. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. could see a 3208 and 6V92 sitting together side-by-side on the floor, The Series 71 engine was the first product of GM's Detroit Diesel Division. Thats all the longer the engine would last! Using a pair of 425 hp 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. are self-priming so that you dont suffer the priming problems Published by: D. H. Pascoe & Co., Inc. Thus, higher power at lower speeds. system to the cylinder head and injector. The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. On this Wikipedia the language links are at the top of the page across from the article title. But you get quite a bit more power Stock# 12.7L-06R0131749. how does a 6-71 detroit compare?? - Red Power Magazine 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. is no different than the human body. You are invited to join our public Boat Repair Forum to seek assistance from other members. fires, sinkings, hull failures and machinery failure Detroit - 71 Series - 6 71 tib 485 hp fuel consumption - Boatdiesel.com