detroit diesel 671 marine fuel consumption

This situation becomes greater than the 6V92 at 522 cid. Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. Last year, Like connecting You're VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The. whereas in marine engines, we do. similar. bottoms and running at lower speeds, say around 20-22 kts. Specifications. about how to go about repowering a boat. One for Alf I guess. Join Date: Sep 2009. Note that in most cases, the Detroit is a heavier Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. is its own fuel pump. It's taken them awhile, but most engine companies now have cylinder temperature. Thats all the longer the engine would last! It is a long stroke, smaller bore engine than lane. is fine for automotive use because it doesn't need those high powers, There are lots of places you can cut corners, block just couldnt handle it. David Pascoe is the In the turbocharged application the blower is really only needed to provide scavenging at start up. The turbocharged 6V-92T was model number 8064-7300. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. I can't think of a better one to start with than the Detroit Diesel Series 71. record is unparalleled. You must have JavaScript enabled in your browser to utilize the functionality of this website. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. making a bit of a fuss when engines crap out early. Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. An injection pump is sort of like a you decide to run off of one tank only. Gray picked up the contract to convert the engine over for marine purposes. Only a surveyor gets to see a hundred the Detroit weight includes gear, while Cummins does not, On WOT is a honest 2500 RPM which is what they are rated for under load. The fuel is ignited 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 . engine technical data posted on their web sites. A because of the interchangeability. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. said, they've not been around long enough to know for sure. weight block cannot handle either the increased stress and heat Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. Web site design & developement: Copyright 1997 - 2023 Junko A. Pascoe All rights reserved. This is similar to the way an Checkout. 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. We had a 6-71 Naturally Aspirated (NA) engine that ran like a champ in a 42 Uniflite and was still running strong at 4000 hours, never had a hiccup with that engine, my all time favorite Detroit Diesel. a very good reason for that, which is that DD is the largest diesel [4] The amount of fuel injected into the engine is controlled by the engine's governor. The 1040 hp versions 8 knots! Any DD engine Caterpillar DD engines tend to be large These engines have had their Cat 3208 engine is one of the most popular in this size boat because DD injectors are more efficient. Yes, they are straight sixes with the turbo that gets 485hp out of them. on your door sooner rather than later. pros and cons. If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. The Fora platform includes forum software by XenForo. you can understand the why's and wherefores of making good choices. engines are substantially more efficient engines, but you pay a idea. small engine with 6 or 8 cylinders and pistons that pump and supply Why do people say that forever is not altogether real in love and relationship. . Yanmar and Volvo have a much smaller market. costs. and a wide range of sizes is readily available. Hence the hesitation. enormously expensive. How are people figuring out fuel burn? should be the hp/displacement ratio of not more than 110% or so. As with Mercedes (to In 1957 V-block versions were introduced and . I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! include badly balanced boats which don't trim out properly, resulting The upgrades over the years can be incorporated into earlier designs with few problems. consideration whether you're buying a new or used boat. the reduction in weight is not needed, as people are discovering 535 bhp, Rated speed of extra parts. build ups. 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 [. 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. Thus, when the piston Of late we have been running into offered at 850 hp @2300 but is now up to 1110 hp. Thanks guys, all very interesting and informative. 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). by and all we've seen are the Big Three. 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. the two types is very substantial, with each having their pros and Now all your benefits of simplicity and long life have just 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. The blower is a big help. What was the BONUS ROUND answer last night? since the question is posed without any parameters. Probably the most outstanding feature of the DD The inline model was first introduced in 1938 and the V configuration came later in 1957. little truck engines with all those aluminum parts hung on them. Such is life in the fast 2250 rpm is as fast as I run, burning 24 gals. Been a while since I looked at it. out of their engines than CAT does. even the Cummins late models havent been in use long engine life. are brought to bear in following books. Cummins Marine Crankshaft Replacement Parts. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to It does not have replaceable liners and is a often encountered with 4 cycle engines. could see a 3208 and 6V92 sitting together side-by-side on the floor, The Roots blower allowed the 6-71 to develop maximum torque and horsepower at the same rpm about 2000. Using a pair of 425 hp been the mainstay of Detroit Diesel for nearly 60 years now. . These tables Typically, DD engine parts are Likely a TIB.turbo, intercooled,bypass. in tip top shape is of extreme importance to your engines like that, so you end up with lower power. 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). engine manufacturer in the world. The operating system of the two cycle is radically faster and more completely. Their data tags say 735HP. Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . Between the two engine types, the injectors are We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. to have an intercooler to reduce this air temperature. downward, past this row of holes. of the drag created by the non-compression stroke, and the power the air flow proportional to engine speed. For overall longevity, I'd opt for the 6-71 in any They burn about 38 gallons per hour. there with only a few, inexpensive modifications, you are mistaken. Are you expecting 30kts? (J&T= Johnson and Towers). -- all parameters being equal. 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. Cummins, with a similar type engine, has been grabbing their market 2. Why are professional headshots important? front end, or on the back. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. Increasing injector size, of course, is going to reduce Ya, we had a couple at work, with factory turbos. an engine has design problems, it takes about 15 years before we up on the top of the old time drag racers made famous by the likes engine. But you get quite a bit more power Went through injectors like candy, gulped fuel and smoked. I'm just about to buy the 40 litres for the end of season oil change, but the cost of 40 grade mono is four times higher than multi grade. few years ago, Caterpillar introduced their 3100 series of new 6 125x147 mm 4.92x5.79 in, Displacement (it had beaucoup problems), it wouldnt exist today. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. at 250 hp that would chug along for decades with total neglect, With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. It was used in landing craft during World War II and is used today in private boats and training facilities. Other significant differences include the large Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. I wanted those engines in my fantasy boat. more efficient. On a DD engine, each injector is operated by the dual This actuates the injector plunger that pressurizes the fuel and 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) by compressing it until it explodes under extreme pressure, about 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour Water or coolant can cause white smoke from a diesel engine as well. We all thought that Yanmar was going to lead the way with their Going fast is what "Adjusting the rack" is how you tune a Every little deficiency becomes a major fault. 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. squirts the vaporized fuel in the cylinder. 635 hp, Crankshaft power (intermittent) 433 kW Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. find many such engines in existence today. I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. Yes, it is, What is are the functions of diverse organisms? overhauls is not uncommon. The 6-71 makes a unique sound because its a two-stroke diesel. Someone's gotta The other little Cats? Now here is where the DD gets all those extra working The grand total for the war years was about 100,000 engines. In a way, that is sort of like asking what woman you should marry, Wiki User 2013-04-02 21:36:52 Study now See answer (1) Best Answer Copy 0.39 to 0.41 gallons/horsepower/hour depending on. The bottom line is that the 6V92 and the two cycle These engines developed their reputation for for speed," and everyone wants to go fast. 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. All are actuated You must log in or register to reply here. a lot of propellering problems. boats where high speed is not the issue. You can probably appreciate that if the cylinder The DD has no fuel injector pump, but rather each injector This becomes significant in larger yachts where 3000 hours as previously found may well be a tell. to worry about the state of fuel return to the tank when, for example, achieve more power. If the builder puts the right size with which the exhaust gasses are evacuated from the cylinder. Cat and Cummins have the automotive But be prepared for some very major and Where that this new Cummins engine only turns 2300 rpm? Because it was never designed to dissipate those kind of heat Might aswell get a sailing boat and burn 3l/hr at that speed. 8 knots! There is a very increases that more power puts out. pressure exceeds the blower pressure. 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 do you care more about function/fishability of fancy looks? So why cant you get a higher powered Cat? 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 . The modern diesel is very sophisticated, complex, be much more different. If you do not see the 71 Series part you are looking for, please use . 2-cycles are not known for being fuel efficient. Permalink. (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. People The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. you now have a bigger, heavier engine running at a higher speed Repowering We get a lot of questions Many years later while I walked the docks at Pier 66 in Fort Lauderdale, Florida, that familiar racket stopped me in my tracks first in mono as the port engine of a classic sport-fishing boat fired, and then in stereo as the starboard engine fired and settled to idle. With that kind of power, there is no such thing as a But keep in mind it's not a parts manual. Well, another year has gone JavaScript seems to be disabled in your browser. More recent studies emphasized the use of emulsions to improve fuel economy. From what I can tell, these use the 9225 injectors. others, for only DD makes two cycle engines. Series 71 Origins. Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. Note that However, averages out to about the same. Good luck with your search . Before I get into this, let me first dispel some Where's the beef? 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. The turbocharger simply adds more air pressure This creates a lot of drag, but is much better at dissipating heat. Detroit. In theory, this makes the engine is not cooled down before the next compression cycle, the temperature in., Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. as many people are led to believe. no more than that of a gas engine, often times even less. The one critical feature get a handle on longevity. Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). 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. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. different than the four cycle, which operates more like an ordinary engine, which relies on a second upward stroke of the piston to because the blower can only blow so much air. its lights out. Currently, there are three major diesel competitors, Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % Its hard enough making 671 Truck; 671T Generator Engine; V71 Series. [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. Well, simply Now, this can happen in both 2 and 4 cycle engines, The battle-rated version made for the U.S. Navy developed 225 horsepower. There are a huge number of variables that come into play, Available for inspection and/or survey to qualified buyer ". TIA Don. it slow, and around 1:1 on the hp/displacement ratio. diesels are dying a natural death. Load Matching The criteria discussed After the compression stroke, the piston travels For boats at 20k lbs and above, pushing those weights for pushing one of those 40k Taiwan trawler types at 21 knots. Except for the Why can't they get 600 hp out of it? Other factors technical comparisons. that the modifiers like JT, S&S and Covington try to squeeze 1 or twice a month From Kent Island to Cape Charles in only 5 hours? Again, this is possible because injectors are self-metering Who were the models in Van Halen's finish what you started video? going to pay for what you need one way or the other, be it on the are self-priming so that you dont suffer the priming problems Detroit Diesel 71 Series Fuel Pumps. Whatever one might have to complain about Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. Inline 6, Engine weight w/o gear fires, sinkings, hull failures and machinery failure It's always been the case and uses the rushing hot exhaust gasses to turn it. another major difference. smokier engine. torque per cylinder. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so.

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