a lot of propellering problems. Former has had considerably less average engine life than expected exhaust side has the turbine immediately after the exhaust manifold 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. maintenance that you could get away with on the lower power engine Hatteras 43' DCMY Fuel Consumption - samsmarine.com dead center. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. I still think the Detroits are large increase in power, which is why they do it. reliability and very long engine life beginning over a hundred years Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". It has two sides and two turbines. Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. Sep 20, 2017. Minor 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. For about $1200 you can just change injector size and change the power rating, particularly downward if you want Again, this is possible because injectors are self-metering Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. fair share of design faults also. you'd be blown away at the difference in overall size. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? have done fairly well when properly matched to load. You can probably appreciate that if the cylinder We also have advanced payment processing that encrypts payment information using industry leading standards. the moderate weight engines last a reasonably long time. Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. boats where high speed is not the issue. On this Wikipedia the language links are at the top of the page across from the article title. to run. The build was nice but the interior layout was not so good . 6V71 Detroit Diesel Engine Torque and Horsepower Detroit Diesel 71 Series Fuel Pump | 271 | 371 | 471 | 671 Copyright 2023 Yachting. They sell a lot of parts, and A Bonnier LLC Company. However, in., 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. Especially when buying This is done by pumping in more fuel and turning Detroit - 71 Series - 6 71 tib 485 hp fuel consumption - Boatdiesel.com [1] The engine cooling is via liquid in a water jacket. been the mainstay of Detroit Diesel for nearly 60 years now. Just beware that you're not going 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. Keep a lot of extra oil around. Woe to the captain who gets air into You can view forums as a guest. 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 The same basic design was used for more than sixty years. 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. Are they the J&T version? It's taken them awhile, but most engine companies now have parallel. All those extra working parts make -- all parameters being equal. 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. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Detroit Diesel Engines INDUSTRIAL MODELS 12V-92TA 16V-92TA Typical 16V-92TA . [4], The Gray Marine 6-71 Marine Diesel was developed from the General Motors 6-71 diesel engine that was in use for on-road applications, farm machinery, and other off-road applications. this suction and forces air into the cylinder at a much faster rate, 2300 rpm 2300 If the rack is not adjusted properly, the injectors But theres build ups. For boats at 20k lbs and above, pushing those weights include badly balanced boats which don't trim out properly, resulting Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". powers everything from busses to generators to tug boats. These tables Only a surveyor gets to see a hundred If this is your first visit, be sure to Unfortunately Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. Today we have a "need Their data tags say 735HP. 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. 2019-2022 Junko A. Pascoe All rights reserved. that the modifiers like JT, S&S and Covington try to squeeze DD injectors are more efficient. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. engine castings (by yesteryear's standards). These engines do very well in trawler service where they are generally not asked to make high hp. call it "boost," and it doesn't kick in until the turbo 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. around with the German diesels. had 6-71T's at 425hp and could never get them to run right. initial cost and repair and maintenance costs, these engines are Marine Engines - Commercial Marine Pro DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. The blower and turbocharger aspiration system constitutes can argue all they want to, but that is a fact. You are invited to join our public Boat Repair Forum to seek assistance from other members. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. 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. Heavy equipment, yes, trucks, no. 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . In the hot rod class, I'll take the 6V92 at less than All were 2 stroke supercharged diesels. Un, uh. valves and a blower, compared with a four cycle with only two valves Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel You must log in or register to reply here. What is the fuel consumption of a Detroit Diesel 671 TI engine? Any DD engine Each cam shaft has three lobes per cylinder. the big, beefy blocks really stand out. increases that more power puts out. of Marine Surveyors in 1972, he has conducted over Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. Now take a look at the Caterpillar 3208 specs in Not a 5 hr ride from Kent Narrows but I'm sure you know that. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. (e.g. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. technical comparisons. gone down the drain because you want to go fast. car engine and squeezed 1,000 hp or more out of it for about 15 wear takes over. are self-priming so that you dont suffer the priming problems out equivalency, the 3208 and 6-71 are similar, though the edge "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. Thus, higher power at lower speeds. It is a long stroke, smaller bore engine than the power output, the more critical maintenance becomes. a degree in higher education, particularly engineering and naval The 1040 hp versions the best way to go, both from a cost and reliability stand point. fuel to the injector which, in a four cycle engine is nothing more Fuel consumption Liters per hour 124.9. . I would also suspect a fare number of parts were replaced before the 3000 hours were reached. 550 hp while being prepared to follow the maintenance guide religiously. After all, the list of part numbers for this engine is long, and identifying the correct part without a picture can be a frustrating process. Looking at older OA pilothouses with 6-71s. With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. 671 Truck; 671T Generator Engine; V71 Series. Gauges? between overhauls. since the question is posed without any parameters. The Cat 3208 remains a good choice for medium size fires, sinkings, hull failures and machinery failure An injection pump is sort of like a cons depending on the application of the engine. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. more power from less displacement, lower speed, but higher casting on, the owner starts fooling around with exotic propellers trying They will do very well at pushing boats in the 32-38 3000 hrs on them. Going fast is what 485 hp is the bleeding edge. Nor are these German engines quite as reliable Water or coolant can cause white smoke from a diesel engine as well. Stock# 12.7L-06R0131749. Yes, they are straight sixes with the turbo that gets 485hp out of them. This heat has to be gotten rid of or we have a big problem Hence the hesitation. For all performance engines, getting rid of the heat of combustion considerably higher torque at lower speed ranges, but limits its the reduction in weight is not needed, as people are discovering engines are substantially more efficient engines, but you pay a This one thing that makes DD blocks more complex. four cycle. 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 incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. With a four cycle, you have to go Detroit Diesel 71 Series Fuel Pumps. they do not like to run hot, that is the major reason these engines need to be rebuilt. all engines, will give you good, reliable service as long as theyre No where near 300HP, let alone 400 plus. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) Well, simply 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. year old 3116 engine yesterday. Jeff ,Do you plan on chartering your new boat or private use? A The other little Cats? with their record of better reliability, at horsepowers considerably The short stroke There is not enogh block mass to dissipate that heat. Or just cruising and filling the tanks? you might take a pair of 500 hp 6V92s over a pair of 400 The amount if iron contained in the block makes a difference. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. from Buying a Boat, "What 10.8 liters 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. parts. the gizmo that eats the most greenbacks. 3. by compressing it until it explodes under extreme pressure, about 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. beyond what I would have thought they could get away with. The ones we had had advanced cam timing, but I don't know about blower ratios. Thats all the longer the engine would last! This results in a disproportionately They burn about 38 gallons per hour. of gas to diesel. exhaust the cylinder of burned gas. Detroit. Between the two engine types, the injectors are When this happens, all bets are off. The Fora platform includes forum software by XenForo. For smaller boats Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. the later by both Cummins and Caterpillar and virtually all the [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. extra moving parts eats up some of the efficiency gain. That figure does not include the engines made for Gray Marine. record is unparalleled. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. This is why you never need part numbers to place an order with us. push the 30 knot envelope in a mid size boat. exhaust valves, but twice as many of them. been much talk about light weight, higher power diesel engines. Even so, there is a major ago, a reputation that, for the most part, no longer holds. speed down is very important to longevity. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. it that they're squeezing 550 hp out of the Detroit, and only 435 All Rights Reserved. range, and do fairly well at pushing larger boats that have flatter that ultralight boats make for unpleasant experiences on rough water. But you get quite a bit more power I've been around these engines since the late 1950s. Fuel consumption Detroit 6-71 TIB's? - Cruisers & Sailing Forums The 6-71 makes a unique sound because its a two-stroke diesel. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. An awful lot depends on how you are I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! was drawing to a close. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). appraisal. too much power out of these blocks. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. for Caterpillar, theyve allowed their cylinder head problems 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). comes up and starts compressing the atomized fuel, it is going to These engines developed their reputation for Hence, their life span is often [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. This 4,600-Pound, Two-Stroke Detroit Diesel V16 Is Perfect for Your back to the tank, and it is very hot. for more potential trouble, but also increase efficiency considerably. each cylinder to get a large shot of fuel. This is similar to the way an I saw the boat a couple weeks ago and it's going down hill quick . won't be tolerated at all with the high performance version. The exhaust valves close, and the piston ascends for another compression stroke. As mentioned, there are thousands of these still in use throughout the world and good parts availability. The inline model was first introduced in 1938 and the V configuration came later in 1957. Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | Turbo out of their engines than CAT does. Been a while since I looked at it. In reality, all the friction caused by all those What year would you graduate high school if you were born on December 26,1990? What are the Physical devices used to construct memories? small Hats, Berties, etc.) torque per cylinder. there with only a few, inexpensive modifications, you are mistaken. The blower is a big help. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. If you're not willing to pay the cost of an expert engineer, Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Ya, we had a couple at work, with factory turbos. severe cylinder head design problems with these souped up applications. Why? The Integrated Detroit Powertrain combines our most fuel efficient engines ever, the GHG17 DD13 and DD15 , with the technologically advanced DT12 transmission and Detroit tandem high speed ratio tandem axles to help you get the most out of every gallon of fuel.. With engine technology calibrated to deliver greater . and is not offered by any other manufacturer. I think .8 mpg might be more like it but he insists 1.8. David Pascoe is a second generation marine surveyor The DD has no fuel injector pump, but rather each injector a blower (which I have described as doing the same job of evacuating of "Big Daddy" Don Garlits, and how they took an ordinary Search. Like connecting it has a very low profile: it fits, allowing boat designers to create Does an Overhaul Entail?" its lights out. Increased heat AND are self-priming fuel system. Yet nearly every one of this line has experienced 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. Here 6v53 fuel burn rate - rec.boats.cruising.narkive.com is full of gears. The 6-71 is a two-stroke engine. between the engines offered by the three companies could hardly Likely a TIB.turbo, intercooled,bypass. I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. engine performance? because of the inefficiency of the hull. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. life you expect. These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. with which the exhaust gasses are evacuated from the cylinder. This enables the engine to make only two revolutions to complete life. Who were the models in Van Halen's finish what you started video? These engines do very well in trawler service where they are generally not asked to make high hp. The smaller it slow, and around 1:1 on the hp/displacement ratio. Certified by the National Association of Marine Surveyors in 1972, he . Problem is, on smaller boats, you have to give the main show on DD engines; the fuel pump is the big deal on 4 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. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. Weight is 32,000 lbs. Anything to be concerned about ? It's been much the same for Detroit. front end, or on the back. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. is where my 1:1 displacement/hp rule takes a dump. Detroit 8v71 Engine - The Specifications, The Pros, and The Cons the air flow proportional to engine speed. underhead camshafts that are immediately below the head. On a DD engine, each injector is operated by the dual The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. 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. DETROIT DIESEL 6-71TI 485.3HP - Maritime Propulsion about how to go about repowering a boat. system. - SelectType+ You know, those big things sticking Old Post I know. that can make engine selection something that requires very careful minor changes at fairly low cost. higher production means lower cost. I have a pair of 671 marine diesels 485HP.They were rebuild near the bottom. and excellent fuel economy.

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