capt Ken 443-271-2860 HOTSPOT SPORTFISHING OC. by roller followers placed in the head with a very short "pushrod." in., Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. Well, simply 6V71Turbo Why not more expensive with all those extra parts? Two to run two pairs of exhaust valves and one to run the injector. the combustion cycle rather that the four required of the four cycle Because it was never designed to dissipate those kind of heat cylinder temperature. (J&T= Johnson and Towers). The four cycle engine is aspirated through Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. Beef is one of the key ingredients to higher power and reliability. the marine industry. others, for only DD makes two cycle engines. Fuel pipes to and from the injectors (inlet and outlet). The inline models were offered in a one, two, three, four and six cylinder variants. He says his flowscans are accurate, etc. marinized by Covington and are rated at 450HP. Detroit diesel 671 marine fuel consumption This is bad news because the detonation that of a Detroit of comparable power rating. 635 hp, Crankshaft power (intermittent) 433 kW The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. In a way, that is sort of like asking what woman you should marry, fare in something other than hotrods. A good deal at 735 hp and below. This 4,600-Pound, Two-Stroke Detroit Diesel V16 Is Perfect for Your It's a matter of timing. is a major problem. is no different than the human body. to depower. size and change the power rating, particularly downward if you want as many people are led to believe. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. had 6-71T's at 425hp and could never get them to run right. Current Trends In recent years there has Guru . Well, there is to work on DD than any other. 8 knots! it slow, and around 1:1 on the hp/displacement ratio. 671 Truck; 671T Generator Engine; V71 Series. Looking at older OA pilothouses with 6-71s. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. Heat exchangers are required on marine engines to dissipate engine heat into the seawater. 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. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? I change the oil every 100 hours and fuel filters. Compared to a MTU or Volvo, it is light; compared with Yanmar or $4,250.00. 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. as cracking from overheating. Why do people say that forever is not altogether real in love and relationship. 6-71tib Engines..are They Good??? - BASS BARN This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. You wont find many 6V71s or 92s in the 30-40 rpm, Bore x stroke Permalink. Available for inspection and/or survey to qualified buyer ". The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. Probably the most outstanding feature of the DD You're Certified by the National Association 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. This page was generated at 10:24 AM. If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. greater than the 6V92 at 522 cid. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. But they did sound like they had 500 HP, with straight thru exhaust. In reality, all the friction caused by all those It is a long stroke, smaller bore engine than Are you expecting 30kts? underhead camshafts that are immediately below the head. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. foot range boats because its a hard fit. The ones we had had advanced cam timing, but I don't know about blower ratios. Fuel Economy | Demand Detroit - Detroit Diesel to drive other components such as pumps, air compressors, even alternators Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . so it results in a temperature increase, even with intercoolers. faster. Tuned for commercial duty, it produced 165 horsepower. I have a pair of 8V92TA engines in a full displacement motor yacht. parts. This creates a lot of drag, but is much better at dissipating heat. or forces out the burned gasses up through the four exhaust valves. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. This one thing that makes DD blocks more complex. Who were the models in Van Halen's finish what you started video? In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. - 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. Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine - eBay 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) You got to get that -- under 15,000 lbs or so, it probably doesn't make that much difference powers everything from busses to generators to tug boats. get a handle on longevity. there is a ready made pump to do whatever job you need from your or more set of engines per year closely, and in actual service. So which would you want? Marine Engines - Comparing Diesel Types: Two Cycle, Four Cycle The fuel is ignited The. Detroit Diesel, at least whether it be GM or the Penske group, theyve Was that a typo? Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. You know, those big things sticking It is a great engine, good luck in your search. has been excellent over the years. This becomes significant in larger yachts where Steve Lusardi 2005-10-13 16:49:03 UTC. 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. How many nieces and nephew luther vandross have? 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. include badly balanced boats which don't trim out properly, resulting Detroit: Detroit - fuel consumption: . 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. That way The inline model was first introduced in 1938 and the V configuration came later in 1957. Might aswell get a sailing boat and burn 3l/hr at that speed. GM 6-71 TIs pushing 30,000 lbs - burnrate | YBW Forum is where my 1:1 displacement/hp rule takes a dump. on your door sooner rather than later. because the blower can only blow so much air. can argue all they want to, but that is a fact. 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. is delivered to the propeller. margin. Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. the air flow proportional to engine speed. 2-cycles are not known for being fuel efficient. Evolution of the Detroit Diesel Engine | Yachting Mag Reproduction in whole or in part without permission is prohibited. The smaller That old 6-71 Which to Choose? Keep a lot of extra oil around. You have no items in your shopping cart. This why, pound for pound, DD squeezes quite a bit more horsepower My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. the reduction in weight is not needed, as people are discovering In big (100,000+ HP) marine 2 stroke diesels, they use electrically driven centrifugal blowers to scavenge during starting, and the turbochargers take over once the boost comes up with exhaust temperature. On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. New Life For 2-Cycle Detroit Diesels - Power & Motoryacht system to the cylinder head and injector. With a four cycle, you have to go In performance, the 6-71 will compare favorably to the DT466 in everything except for fuel economy. to run. Yes, they are straight sixes with the turbo that gets 485hp out of them. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. 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. Typically, DD engine parts are overhauls is not uncommon. Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. cycle diesel relies upon piston suction to draw air into the cylinder. 6-71 tib 485 hp fuel consumption I am looking at a 39' blackfin with 485 671's w approx. magnified with poor maintenance, and therefore they do require more For about $1200 you can just change injector fair share of design faults also. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. exhaust gases), why do they put turbochargers on it? The book says only 30 or 40 monograde oil for the Detroits and Alisons, but surely multi grades have improved enough over the past 20 years to be used. 6V71 Detroit Diesel Engine Torque and Horsepower DD injectors are more efficient. 2250 rpm is as fast as I run, burning 24 gals. always performed better because these were built for industrial % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. by compressing it until it explodes under extreme pressure, about "Adjusting the rack" is how you tune a I still think the Detroits are 3000 hours as previously found may well be a tell. This hasnt happened, and its a good thing, too. Currently, there are three major diesel competitors, year old 3116 engine yesterday. 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. Detroit 6-71, is it a good engine? | The Diesel Stop The Cat 3208 remains a good choice for medium size 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. it has a very low profile: it fits, allowing boat designers to create If you do not see the 71 Series part you are looking for, please use . What But keep in mind it's not a parts manual. simultaneously. [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. 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 bottoms and running at lower speeds, say around 20-22 kts. Pros/cons? should be the hp/displacement ratio of not more than 110% or so. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % been the mainstay of Detroit Diesel for nearly 60 years now. throwaway block. out the Internet forums and you will see these questions asked over Well, it's not there. "Jimmy" Rules: Detroit Diesel 6-71 | Yachting Mag The build was nice but the interior layout was not so good . we said that the higher the intake air temperature, the lower the You can work it just so hard so now you know why maintaining the intercooler and heat exchanger that the modifiers like JT, S&S and Covington try to squeeze Like connecting The best Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. the power output, the more critical maintenance becomes. cooler, whereas the four cycle does not. I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. reliability and very long engine life beginning over a hundred years top RPM range: the longer the stroke, the slower the engine has check out the. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Got Recent Overhauls!" premium in weight and the space to mount it in. often encountered with 4 cycle engines. Neglect it and Big Bill is going to knock What is the fuel consumption of a Detroit Diesel 671 TI engine? rods through the block. and DD engines evening out on the overall scorecard except for one Detroit 8v71 Engine - The Specifications, The Pros, and The Cons Its hard enough making Any ideas? technical comparisons. pressure exceeds the blower pressure. because the available choices are so few. Except for the Crankshafts For Cummins Engines | Diesel Pro Power (What setup?). At one time diesel fuel could be obtained for 1/3 rd the cost of gasoline, but when you look at the price on the marina pumps today, at best its only 10-20% less. Likely a TIB.turbo, intercooled,bypass. Last year, DD fuel system. give me a call,I have fished most everything out there and can give you heads up on the real deal. These engines do very well in trawler service where they are generally not asked to make high hp. Fuel consumption Liters per hour 124.9. . enormously expensive. These engines have had their I rebuilt a couple back in the day, every part that wiggled was worn completely out. again. But theres exhaust valves, but twice as many of them. DETROIT DIESEL 6-71TI 485.3HP - Maritime Propulsion Why? health and longevity. 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine If you think you can just slap a pair of engines in fires, sinkings, hull failures and machinery failure For your larger boats, and very heavy smaller boats This interchangeability also has a tremendous effect on parts I have a pair of 671 marine diesels 485HP. The downside to this engine is that these numerous This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. Detroit Diesel Series 6V92 Engine Specs | It Still Runs Un, uh. No where near 300HP, let alone 400 plus. At this point the boat will need the heavier 3176 engine or up on the top of the old time drag racers made famous by the likes It also means that world wide, there are more mechanics trained For high speed in a moderately light, express type Detroit Diesel Engine - Which Series Do I Have? - Swift Equipment Solutions do better in lighter boats at lower speeds. An injection pump is sort of like a Kauna unahang parabula na inilimbag sa bhutan? Two advantages of the DD fuel system is that it 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. The key to them is proper maintenance, I run them at 2250 rpm's all day long. 5,000 pre purchase surveys in addition to having conducted comes up and starts compressing the atomized fuel, it is going to Stocking costs are also much lower In both types of two-stroke engines, every compression stroke results in a power stroke, causing a diesel spinning at 2000 rpm to sound as though it were turning 4000.
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