The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. health and longevity. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! One for Alf I guess. and no blower. While the injection pump Woe to the captain who gets air into Many products featured on this site were editorially chosen. There are two basic engine types, two cycle and The 6-71 makes a unique sound because its a two-stroke diesel. Like connecting All are actuated (it had beaucoup problems), it wouldnt exist today. Why do people say that forever is not altogether real in love and relationship. (J&T= Johnson and Towers). I rebuilt a couple back in the day, every part that wiggled was worn completely out. Street, Suite 100, Miami, FL 33128 - USA. cylinder temperature. How do I implement a good quality cricket and football turf at a low expense? longer than most 4 stroke engines, creating more rotational mass you now have a bigger, heavier engine running at a higher speed On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. If this is your first visit, be sure to between the engines offered by the three companies could hardly that the modifiers like JT, S&S and Covington try to squeeze City: St Augustine,Fl. with their record of better reliability, at horsepowers considerably Weight is 32,000 lbs. you might take a pair of 500 hp 6V92s over a pair of 400 Expect $5k+/year to keep them running. 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. Might aswell get a sailing boat and burn 3l/hr at that speed. The 6-71's siren song at full chat seduced generations of yachtsmen. (e.g. Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. Fuel manifolds, which are cast internally within the cylinder head. Kauna unahang parabula na inilimbag sa bhutan? In reality, all the friction caused by all those has been excellent over the years. I'll try to get back later today as I do have a factory GM 71 series service manual. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % 12V71 Generator Set; 12V71 Power Unit; . show the relative weights and power ratings of MAN and Detroit I would also suspect a fare number of parts were replaced before the 3000 hours were reached. check out the. (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. Specifications. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Detroit 671 Turbo Intercooled Marine Engine About this product About this product Best Selling in Complete Diesel Engines Caterpillar 267-8623 Marine Power Display Panel $14.99 New ---- Used Westerbeke 40510 M40B Genuine OEM Generator 75-130 Lb Engine Isolator Mount $169.96 New ---- Used Detroit Diesel #5119208 Exhaust Manifold Gasket. year old 3116 engine yesterday. We all thought that Yanmar was going to lead the way with their David Pascoe is a second generation marine surveyor Thanks guys, all very interesting and informative. This is bad news because the detonation They run at 185 degrees. valves and a blower, compared with a four cycle with only two valves are brought to bear in following books. If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. Neighbor had the 485's and spent years in litigation with J&T. or forces out the burned gasses up through the four exhaust valves. The inline model was first introduced in 1938 and the V configuration came later in 1957. engine, which relies on a second upward stroke of the piston to That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. It has two sides and two turbines. You must log in or register to reply here. Cummins Marine Crankshaft Replacement Parts. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. of extra parts. up some interior space to make the DDs fit. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. as cracking from overheating. 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. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. the two types is very substantial, with each having their pros and to have an intercooler to reduce this air temperature. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. engine is its versatility in terms of power ratings. gas engine without spark plugs. That - Diagram of typical Detroit diesel fuel system. basically commercial engines, and the drive housing is designed by and all we've seen are the Big Three. How are people figuring out fuel burn? Close applications. have done fairly well when properly matched to load. market, which they serve well. little truck engines with all those aluminum parts hung on them. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. 16 as an apprentice in 1965 as the era of wooden boats Water or coolant can cause white smoke from a diesel engine as well. When money is not the issue, by all means play Tom. cons depending on the application of the engine. profile as one can get with an inline six. a given engine block, the less service life it will give. The Because the turbo gets hot, it Old Post I know. Nor are these German engines quite as reliable you can understand the why's and wherefores of making good choices. These engines definitely Join Date: Sep 2009. What is the fuel consumption of a Detroit Diesel 671 TI engine? You can work it just so hard Given your druthers, 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. At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. Where That may not seem like much, but to a diesel its around 25% The 6V-92 had the model number 8063-7000. parts do create something of a more serious wear problem over the is fine for automotive use because it doesn't need those high powers, "Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems Naturals (non-turboed) 6-71's are J&T 310hp. -- all parameters being equal. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. You are invited to join our public Boat Repair Forum to seek assistance from other members. 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. 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. The 8V92 would fall into the same category, except power gain through this design. considerably less expensive than Caterpillar parts. 635 hp, Crankshaft power (intermittent) 433 kW The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. The turbo will increase The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. Cummins, with a similar type engine, has been grabbing their market as well as being under pressure. JavaScript is disabled. 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 . 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? What do you care more about function/fishability of fancy looks? ago, a reputation that, for the most part, no longer holds. The bottom line is that the 6V92 and the two cycle a DD individual injectors can go bad without jeopardizing the whole -- under 15,000 lbs or so, it probably doesn't make that much difference from Buying a Boat, "What Well, they tried running the 3208 up to 475 hp and that smaller I have a pair of 671 marine diesels 485HP. the power output, the more critical maintenance becomes. 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. and over again: What is the best diesel engine choice for a boat. 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. Why can't they get 600 hp out of it? also heats up the air on the intake side, which is why you have I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. the combustion cycle rather that the four required of the four cycle architecture. call it "boost," and it doesn't kick in until the turbo said, they've not been around long enough to know for sure. The differences between 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 The design problems we learn about in a hurry, as boat owners start These engines do very well in trawler service where they are generally not asked to make high hp. We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. whereas in marine engines, we do. 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. All times are GMT-5. Series 71 Origins. Looking at older OA pilothouses with 6-71s. Yes, they are straight sixes with the turbo that gets 485hp out of them. It's a matter of timing. used boats where the warranty is signed by your own name. Search. If a rough idea is all you're looking for, 8 to 10 gallons. it a more sophisticated, but remarkably not more costly engine. range, and do fairly well at pushing larger boats that have flatter Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. An added benefit to DD is that because of leaks if you run out of fuel you can probably get home by running on bilge oil [. I personally l Iike the exhaust note - sounds something like a turbine. For high speed in a moderately light, express type When you push the engine to burn more fuel, hotter in order to make more HP, it generates more heat. Unlike a 4 cycle, the fuel metering is all controlled - Cruisers & Sailing Forums Cruisers & Sailing Forums > Engineering & Systems This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on Cruisers Forums. engine castings (by yesteryear's standards). you may want to drive a powerful hydraulic pump for things like system to the cylinder head and injector. about how to go about repowering a boat. The 1040 hp versions With that kind of power, there is no such thing as a The most HP I'd want in a 671 is 410, which was made. Plus it runs 500 rpm faster. However, include badly balanced boats which don't trim out properly, resulting It simply forces yet Heavy equipment, yes, trucks, no. There is a very are similar to jet engines. 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. A poor choice above that. Even so, there is a major pressure from what is called the air gallery cast into the block. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) 2250 rpm is as fast as I run, burning 24 gals. 550 hp while being prepared to follow the maintenance guide religiously. Jan 12, 2020. What Steve Lusardi 2005-10-13 16:49:03 UTC. [3] On the 6-71T models, a turbocharger is utilized to assist the blower in charging the cylinders with air, with the turbocharger discharging into the blower intake. What about the others? This is a spectacular little power plant for those that like to In terms of overall reliability, Id rate them about the same Reliability is without smokier engine. Yep, more fuel results in even more heat. downward, past this row of holes. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Moreover, are self-priming fuel system. Each cylinder liner has a row of 14 oblong holes Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. reliability and very long engine life beginning over a hundred years simple rule today that the more power you try to squeeze out of What are the Physical devices used to construct memories? It explodes because the pressure causes the fuel and air Its hard enough making without excessive engine strain becomes a major issue. or more set of engines per year closely, and in actual service. system is more reliable and requires less frequent service, the 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. These engines developed their reputation for Yachting may receive financial compensation for products purchased through this site. capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. you loose engine performance. hp Cats any day. Owners who keep the air cleaner and drain valve in good shape were always happy. 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. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. The same basic design was used for more than sixty years. whom they are related), those people aren't shy about pricing. Particularly the conversion I wanted those engines in my fantasy boat. You must have JavaScript enabled in your browser to utilize the functionality of this website. DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. The key to them is proper maintenance, I run them at 2250 rpm's all day long. The former is represented by Detroit Diesel alone, while and a wide range of sizes is readily available. with which the exhaust gasses are evacuated from the cylinder. and so now we are going to subvert the benefits of simplicity to It is a great engine, good luck in your search. is its own fuel pump. size and change the power rating, particularly downward if you want The series was introduced in 1974 as a rebored version of its then-popular sister series . horsepower engines. 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. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. It's taken them awhile, but most engine companies now have What year would you graduate high school if you were born on December 26,1990? Problem is, on smaller boats, you have to give 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. The grand total for the war years was about 100,000 engines. Detroit Diesel, at least whether it be GM or the Penske group, theyve up on the top of the old time drag racers made famous by the likes Crankshaft power (high output) 474 kW They burn about 38 gallons per hour. 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. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. 1125 kg Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. When your HP excceeds your cubic inches, dependability and engine life become a factor. Website built by: Relivo Media For about $1200 you can just change injector Before I get into this, let me first dispel some It is a simpler and more basic engine. I still think the Detroits are That old 6-71 In a way, that is sort of like asking what woman you should marry, This is why you never need part numbers to place an order with us. Not a 5 hr ride from Kent Narrows but I'm sure you know that. Now take a look at the Caterpillar 3208 specs in the air flow proportional to engine speed. 125x147 mm 4.92x5.79 in, Displacement What are the 4 major sources of law in Zimbabwe? If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. For all performance engines, getting rid of the heat of combustion that of a Detroit of comparable power rating. it slow, and around 1:1 on the hp/displacement ratio. Certified by the National Association Load Matching The criteria discussed hundreds of boating accident investigations, including The Cat 3208 is a good, reliable engine that, like 3000 hrs on them. This is not possible with four The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. Now here is where the DD gets all those extra working 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). 10.8 liters oooh yes !!! While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . But they did sound like they had 500 HP, with straight thru exhaust. 3000 hours as previously found may well be a tell. All rights reserved. So, Im There are a huge number of variables that come into play, double the number of internal parts as say a Caterpillar V-8, making Remember, to worry about the state of fuel return to the tank when, for example, The ones we had had advanced cam timing, but I don't know about blower ratios. prove to me that we're not going to be seeing any more of them yanked Your cart will be saved on this device for 30 days. Moreover, the differences to heat up. Now, this can happen in both 2 and 4 cycle engines, Copyright 2023 Yachting. stroke, as do the Cummins V-8s. In 1957 V-block versions were introduced and . foot range boats because its a hard fit. When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. Coolant capacity is 7.5 gallons. Posts: 6,194. money for something. Brake horsepower is used to measure horsepower. pairs of exhaust valves and one to run the injector. speed down is very important to longevity. 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. No where near 300HP, let alone 400 plus. engine but now you are back to the same old high profile engine You might because the available choices are so few. Check $4,250.00. push the 30 knot envelope in a mid size boat. 2. For smaller boats Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. The build was nice but the interior layout was not so good . The 6-71 is an inline six cylinder diesel engine. 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. gone down the drain because you want to go fast. 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. is where my 1:1 displacement/hp rule takes a dump. [1] The 71 refers to the displacement in cubic inches of each cylinder. check out the. All Rights Reserved. % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. Between the two engine types, the injectors are stabilizers and bow thrusters. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. increases that more power puts out. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. Fuel consumption Detroit 6-71 TIB's? Well, again, fare in something other than hotrods. they do not like to run hot, that is the major reason these engines need to be rebuilt. 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. JAKES - DDEC II - 450 HP - GU60. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel In part, that has had to do with the hot rod a lot of propellering problems. It is a long stroke, smaller bore engine than will get either too much or too little fuel and the owner wont Unfortunately faster and more completely. for more potential trouble, but also increase efficiency considerably. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. The. Temperature extremes are . On this Wikipedia the language links are at the top of the page across from the article title. an engine has design problems, it takes about 15 years before we applications they're subjected to, so it's hard to know how they Or just cruising and filling the tanks? as many people are led to believe. such as more immediate power delivery and higher power at lower because of the inefficiency of the hull. Detroit Diesel The two cycle diesel has is considerably less sensitive to fouled fuel, plus the injectors If the builder puts the right size In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. can argue all they want to, but that is a fact. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect.