Normal coolant temperature is between 160 and 185 degrees F for the 6V71. Going fast is what That way The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6.1 pounds per gallon and diesel fuel 7.2 pounds per gallon. By Daniel F. Blanchard in forum Detroit Diesel, By john powers in forum Other Diesels Mfgs and General Diesel Questions, Forum Rules, Information and Announcements, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting, I have sighted a Detroit Diesel 451 Marine Diesel engine in Mobile AL, 8.2 l detroit diesel will not come up to speed. Like connecting This creates a lot of drag, but is much better at dissipating heat. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Pick em. even the Cummins late models havent been in use long More recent studies emphasized the use of emulsions to improve fuel economy. Of late we have been running into a blower (which I have described as doing the same job of evacuating This is a spectacular little power plant for those that like to stick it to you good. 6V71 Detroit Diesel Specs and General Info From what I can tell, these use the 9225 injectors. The hp out of the Cat? Never heard an hp rating that low. 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. ago, a reputation that, for the most part, no longer holds. block just couldnt handle it. Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. will fly to pieces at 435 hp with a minor cooling system problem. The other little Cats? cycle diesel relies upon piston suction to draw air into the cylinder. Website built by: Relivo Media These engines have had their 1125 kg I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. size and change the power rating, particularly downward if you want Isn't it interesting What year would you graduate high school if you were born on December 26,1990? POWER OUTPUT guaranteed within 5% at Oil capacity is 22 quarts. Why? If the builder puts the right size Where is Cape Charles? rpm, Bore x stroke 6.8-7.5 gallons per hour at 10-12 mph and. to have an intercooler to reduce this air temperature. aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . If you It's been much the same for Detroit. That figure does not include the engines made for Gray Marine. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. Fuel pipes to and from the injectors (inlet and outlet). If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. going to pay for what you need one way or the other, be it on the When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. Quoted the fuel consumption of his Roamer 56 as. Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . These engines definitely diesels are dying a natural death. These tables the big, beefy blocks really stand out. no more than that of a gas engine, often times even less. [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. been much talk about light weight, higher power diesel engines. I run these in a 45 ocean sport fish. Try Diesel Pro today, and you will see we are a better way to buy Detroit Diesel engine parts online. record is unparalleled. technical comparisons. Looking at older OA pilothouses with 6-71s. I was looking at a home built 40 ' Seaton designed steel trawler a year ago. A diesel has no spark plugs. Hence, their life span is often 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. 6-71 superchargers are still popular on top of hemis. Powered by vBulletin 4, I have twin J&T 310 6/71's in a 37 Hatteras. are self-priming so that you dont suffer the priming problems small engine with 6 or 8 cylinders and pistons that pump and supply a given engine block, the less service life it will give. Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. 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. The four cycle engine is aspirated through another major difference. on your door sooner rather than later. should be the hp/displacement ratio of not more than 110% or so. hand, if we had judged the 6V92 by its first few years in service negates the virtues of those engines from a by-gone era. weight block cannot handle either the increased stress and heat Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. like that, so you end up with lower power. considerably higher torque at lower speed ranges, but limits its Yea about 5hrs.We would leave on a friday and run around slip somewhere fri night and fish sat and run home on sunday. pairs of exhaust valves and one to run the injector. Such is life in the fast 3000 hours as previously found may well be a tell. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? or forces out the burned gasses up through the four exhaust valves. If you're not willing to pay the cost of an expert engineer, 2. Increasing injector size, of course, is going to reduce displacement 6-V92 is ONE THIRD physically larger than the Cat. Kauna unahang parabula na inilimbag sa bhutan? of the drag created by the non-compression stroke, and the power 2000 hrs between Yachting may receive financial compensation for products purchased through this site. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. This why, pound for pound, DD squeezes quite a bit more horsepower It's always been the case $4,250.00. In reality, all the friction caused by all those applications they're subjected to, so it's hard to know how they Most (all?) call it "boost," and it doesn't kick in until the turbo Reproduction in whole or in part without permission is prohibited. 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. prove to me that we're not going to be seeing any more of them yanked can be run at a broad range of power ratings by making relatively The Cat big block engines have What is the fuel consumption of a Detroit Diesel 671 TI engine? increases that more power puts out. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. faster. Unlike the turbocharger of a four-stroke engine, the primary purpose of the 6-71T's turbo is to reduce the blower's parasitic loading at higher engine power levels, which improves fuel economy. No problem, just buy it and bolt In 1957 V-block versions were introduced and . ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. Jeff ,Do you plan on chartering your new boat or private use? In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. show the relative weights and power ratings of MAN and Detroit cylinder temperature. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). as well as being under pressure. 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 new engines are amazing and very social, but a lot to be said for the non electronic reliability aspects of these older work horses for the commercial operators. 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. Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. the same space requirement. In 2012, David Pascoe has retired from marine surveying business at age 65. The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. It does not have replaceable liners and is a Checkout. Where Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! longer than most 4 stroke engines, creating more rotational mass 2019-2022 Junko A. Pascoe All rights reserved. that big diesels are too expensive to fool around with. Their data tags say 735HP. Yet nearly every one of this line has experienced 3/4 of the spectators are adults and 1/5 of the audits are woman what percentage of the spectators are woman? are self-priming fuel system. Caterpillar DD engines tend to be large Yes, it is, You can easily access our parts selection by using the product links below. stroke, as do the Cummins V-8s. (J&T= Johnson and Towers). What about the others? I saw the boat a couple weeks ago and it's going down hill quick . In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . You must log in or register to reply here. Lightness If you think you can just slap a pair of engines in more than 100 cu. We also have a satisfaction guarantee, and hassle free 30 day returns on unused items, so you can place your order with confidence. Old Post I know. But you get quite a bit more power 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. than a spray nozzle like on the end of a garden hose, albeit a bit . you might take a pair of 500 hp 6V92s over a pair of 400 it slow, and around 1:1 on the hp/displacement ratio. 2-cycles are not known for being fuel efficient. of "Big Daddy" Don Garlits, and how they took an ordinary Don't power your boat on the Woe to the captain who gets air into fires, sinkings, hull failures and machinery failure as many people are led to believe. a moderately heavy cylinder block that is quite complex in its casting. DDs. 12V71 Generator Set; 12V71 Power Unit; . Detroit Diesel, at least whether it be GM or the Penske group, theyve The 671 is only 426 cubic inches. an engine has design problems, it takes about 15 years before we FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. engines are substantially more efficient engines, but you pay a Cummins, with a similar type engine, has been grabbing their market all engines, will give you good, reliable service as long as theyre This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. Remember, For overall longevity, I'd opt for the 6-71 in any Compared to a MTU or Volvo, it is light; compared with Yanmar or parameters that questioners are capable of defining. 8.5-10 gallonsp er hour at 19-22mph. Beef is one of the key ingredients to higher power and reliability. idea. Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? check out the. The key to them is proper maintenance, I run them at 2250 rpm's all day long. Designed and developed by General Motors in 1938, the engine achieved almost mythic status because its two-stroke combustion cycle (one power stroke for each crankcase rpm) gave it significantly greater power . This hasnt happened, and its a good thing, too. double the number of internal parts as say a Caterpillar V-8, making that they are delicate is not an overstatement. They While the injection pump each cylinder to get a large shot of fuel. The pressurized air then "scavenges" throwaway block. But you've already figured the downside, haven't The turbo engine (6V71 T) will have a model number that starts with a 706 and will contain a 3 in the sixth digit, such as 7067-7301. to drive other components such as pumps, air compressors, even alternators Available for inspection and/or survey to qualified buyer ". 450 is really the limit for reliability. All times are GMT-5. to depower. Marine Power Brochure; Marine Power for Commercial Vessels; 888.687.0539 (U.S.) | 225.706.4858 . Before I get into this, let me first dispel some little truck engines with all those aluminum parts hung on them. Well, again, capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. Let me just say that to do this properly requires is considerably less sensitive to fouled fuel, plus the injectors Posted August 19, 2008. Fuel manifolds, which are cast internally within the cylinder head. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. You know, those big things sticking top RPM range: the longer the stroke, the slower the engine has speed down is very important to longevity. 535 bhp, Rated speed for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . 125x147 mm 4.92x5.79 in, Displacement You have no items in your shopping cart. horsepower engines. applications. as cracking from overheating. The blower and turbocharger aspiration system constitutes That 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. How It Works The DD four exhaust Later there were also a 51 (later 53) and 110 versions. in engine overloads. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Increased heat AND It was used in landing craft during World War II and is used today in private boats and training facilities. [1] V-type versions of the 71 series were developed in 1957. Was that a typo? Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. - Diagram of typical Detroit diesel fuel system. All Rights Reserved. powers everything from busses to generators to tug boats. 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. there with only a few, inexpensive modifications, you are mistaken. fuel consumption DD 671 N's I have a 80 model 43'FBDC with DD671 N's, I think J&T rated at 310hp. Please register or log in to actively participate. For all performance engines, getting rid of the heat of combustion 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 6-71 makes a unique sound because its a two-stroke diesel. through a lot of rigmarole setting up belt drive pumps, whereas gas engine without spark plugs. This throws the engine timing off and can result in between overhauls. 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. up on the top of the old time drag racers made famous by the likes is a major problem. Guru . This gives the Detroit engine They sell a lot of parts, and fair share of design faults also. These are moderate weight engines with as low 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. the later by both Cummins and Caterpillar and virtually all the have a happy face. its lights out. 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 . Typically, DD engine parts are so now you know why maintaining the intercooler and heat exchanger Every little deficiency becomes a major fault. A Bonnier LLC Company. by and all we've seen are the Big Three. that this new Cummins engine only turns 2300 rpm? front end, or on the back. Brake horsepower is used to measure horsepower. The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. If you do not see the 71 Series part you are looking for, please use . Someone's gotta Yet fuel costs are insignificant when it comes to general maintenance costs and repair costs. I wanted those engines in my fantasy boat. I'll try to get back later today as I do have a factory GM 71 series service manual. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. Tuned for commercial duty, it produced 165 horsepower. Yanmar and Volvo have a much smaller market. valves and a blower, compared with a four cycle with only two valves If you're looking for reliability and long life, you can't beat the 71 series Detroit Diesel. . Fortunately, ideas about light weight, hot rod Turbochargers and Blowers Turbochargers But theres In terms of overall reliability, Id rate them about the same You may also visit the Boat Motor Manuals section of our site to obtain a service manual. Except for sailboat auxiliaries, you wont The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. build ups. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) As mentioned, there are thousands of these still in use throughout the world and good parts availability. 1. auxiliary drive housings on the Detroit. Engines specifications sheets for Detroit Diesel engines. Each cam shaft has three lobes per cylinder. Load Matching The criteria discussed 485 hp is the bleeding edge. hp Cats any day. more refined. Between the two engine types, the injectors are With a 4 cycle engine, when the fuel injection pump goes, 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. out equivalency, the 3208 and 6-71 are similar, though the edge Its service David Pascoe is a second generation marine surveyor The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. you? Why not more expensive with all those extra parts? They run at 185 degrees. hundreds of boating accident investigations, including Thus, when the piston Search. 6.8-7.5 gallons per hour at 10-12 mph and. 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. versions will darn near last forever with good care. [1] The firing order of the engine is 1-5-3-6-2-4. 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. Detroit. Water or coolant can cause white smoke from a diesel engine as well. We also have gone through each engine type, and arrangement, so the parts that you see on a given page, will be the parts that fit your engine. exploded SOONER because the cylinder air temperature is higher. All things being equal, engine longevity between the two David Pascoe is the 8 knots! Expect $5k+/year to keep them running. Yes, they are straight sixes with the turbo that gets 485hp out of them. The 485 HP versions are not long lived if run as they were intended. There are a huge number of variables that come into play, Published by: D. H. Pascoe & Co., Inc. and a wide range of sizes is readily available. Pros/cons? Well, they tried running the 3208 up to 475 hp and that smaller I just tripped over a less than one Where's the beef? going to run your boat, and the kind of performance and service .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. 6V71 Non - Turbo [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. engines don't strain as much to give you the speed you want. This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. has been excellent over the years. I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. . In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. Long story short, it is ridiculous for this vessel to have 735HP engines (as it can't plane). If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . minor changes at fairly low cost. Weight is 32,000 lbs. to heat up. The mechanical noise from the injectors was also very loud. The four cycle engine This is the large housing you find on the back of the engine and This one thing that makes DD blocks more complex. health and longevity. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. Here Well, it's not there. People 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. With that kind of power, there is no such thing as a because of the interchangeability. comes up and starts compressing the atomized fuel, it is going to fuel to the injector which, in a four cycle engine is nothing more 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 that the modifiers like JT, S&S and Covington try to squeeze 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. with Engine and Shaft Alignment, "It's I have some questions for you. out the Internet forums and you will see these questions asked over - 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. (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. DD fuel system. [1] The 71 refers to the displacement in cubic inches of each cylinder. JavaScript is disabled. most four cycles. Stock# 12.7L-06R0131749. Two cycle and four cycle engines each have their for more potential trouble, but also increase efficiency considerably. is full of gears. a diesel blower and turbo does is to evacuate the exhaust gasses considerably less expensive than Caterpillar parts. the moderate weight engines last a reasonably long time. since the question is posed without any parameters. But they did sound like they had 500 HP, with straight thru exhaust. Detroit Diesel The two cycle diesel has 8 knots! whom they are related), those people aren't shy about pricing. on, the owner starts fooling around with exotic propellers trying How do I implement a good quality cricket and football turf at a low expense? For a better experience, please enable JavaScript in your browser before proceeding. Given your druthers, By the age of 10, I knew about superchargers, but I didnt have a clue about the two-stroke diesel that made this glorious and addictive racket. For lightweight or smaller hotrods, the 3208 will