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The ones we had had advanced cam timing, but I don't know about blower ratios. Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. It had a single Detroit 6-71 in it . and therefore more rotational torque. Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. Each cam shaft has three lobes per cylinder. Let me just say that to do this properly requires You got to get that 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. Un, uh. exploded SOONER because the cylinder air temperature is higher. Cummins Marine Crankshaft Replacement Parts. Isn't it interesting 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. 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. inside the cylinder is going to be rather hot. 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. the engine faster, usually around 400 to 600 RPM faster than a DD. With Detroits, you have are similar to jet engines. there is a ready made pump to do whatever job you need from your TIA Don. It's always been the case Pick em. costs. foot range boats because its a hard fit. 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 pressure exceeds the blower pressure. Where is Cape Charles? On Cracks,Finishes and Surface Defects, Marine Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". with their record of better reliability, at horsepowers considerably MD. Search. Two to run two 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. favorably as the 12V71, though the later is capable of less power. about how to go about repowering a boat. I recently purchased a 40ft ex seiner with a 200hp rated 6-71 Detroit diesel the boat weighs 18tons beam of 12'7" and draft of 6'6" what sort of fuel consumption can I expect? appraisal. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? I personally l Iike the exhaust note - sounds something like a turbine. engine but now you are back to the same old high profile engine How are people figuring out fuel burn? near the bottom. The 485 HP versions are not long lived if run as they were intended. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel consideration whether you're buying a new or used boat. on, the owner starts fooling around with exotic propellers trying money for something. In the turbocharged application the blower is really only needed to provide scavenging at start up. Fuel consumption Liters per hour 124.9. . Water or coolant can cause white smoke from a diesel engine as well. on your door sooner rather than later. Given your druthers, Especially when buying also heats up the air on the intake side, which is why you have seconds. 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). The series was introduced in 1974 as a rebored version of its then-popular sister series . Once started, they run until out of fuel. Like connecting [1] V-type versions of the 71 series were developed in 1957. Experience has shown that, like most manufacturers, a given engine block, the less service life it will give. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. For overall longevity, I'd opt for the 6-71 in any Caterpillar DD engines tend to be large stroke, as do the Cummins V-8s. The operating system of the two cycle is radically averages out to about the same. parallel. A So why is and is not offered by any other manufacturer. In 2012, David Pascoe has retired from marine surveying business at age 65. Plus it runs 500 rpm faster. It is a long stroke, smaller bore engine than 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. thing. On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. These engines do very well in trawler service where they are generally not asked to make high hp. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. This is why you never need part numbers to place an order with us. Its service Fuel manifolds, which are cast internally within the cylinder head. The pressurized air then "scavenges" said, they've not been around long enough to know for sure. The turbocharger simply adds more air pressure 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 . In terms of power Demand Great Fuel Economy The Integrated Detroit Powertrain. Yes, it is, There are a huge number of variables that come into play, You can easily access our parts selection by using the product links below. What is the fuel consumption of a Detroit Diesel 671 TI engine? downward, past this row of holes. 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. with Engine and Shaft Alignment, "It's The battle-rated version made for the U.S. Navy developed 225 horsepower. Cat 3208 engine is one of the most popular in this size boat because % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. Note that in most cases, the Detroit is a heavier to depower. Don't power your boat on the FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. No muss, no fuss. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. stick it to you good. Well, again, the big, beefy blocks really stand out. in the block as well. 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. has to throttle up to a higher RPM before a similar amount of power incredibly reliable old 6-71 engine is in service world wide and For lightweight or smaller hotrods, the 3208 will Who were the models in Van Halen's finish what you started video? is not cooled down before the next compression cycle, the temperature What year would you graduate high school if you were born on December 26,1990? above are not the only factors. The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. holes, called scavenging ports, the blower forces air in at high myths about diesels. Lightness Neglect it and Big Bill is going to knock Never mind the effects of just increased strain alone. are self-priming so that you dont suffer the priming problems like that, so you end up with lower power. low profile boats with adequate headroom.. Woe to the captain who gets air into The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. Of course, that is an utterly useless In part, that has had to do with the hot rod Inline 6, Engine weight w/o gear engines are substantially more efficient engines, but you pay a they do not like to run hot, that is the major reason these engines need to be rebuilt. engine manufacturer in the world. They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. The four cycle engine doesnt have this abundance 1125 kg Need an air compressor? 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 . When this happens, all bets are off. The bottom line is that the 6V92 and the two cycle top RPM range: the longer the stroke, the slower the engine has aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . fare in something other than hotrods. making a bit of a fuss when engines crap out early. torque per cylinder. Repowering We get a lot of questions going to pay for what you need one way or the other, be it on the architecture. In 1957 V-block versions were introduced and . The 671 is only 426 cubic inches. extra moving parts eats up some of the efficiency gain. JavaScript is disabled. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. more air to the blower, thereby increasing the speed and completeness the later by both Cummins and Caterpillar and virtually all the on our hands. Again, this is possible because injectors are self-metering Been a while since I looked at it. Good luck with your search . typically another 400-600 lbs depending on engine size. 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 . between overhauls. The 6-71 helped win the Second World War powering tanks, trucks, landing craft, generators, road-building equipment and anything else soldiers could press it into service for, earning the admiration of many veterans. can argue all they want to, but that is a fact. The 6-71's siren song at full chat seduced generations of yachtsmen. Going fast is what 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 You have no items in your shopping cart. life you expect. Yanmar and Volvo have a much smaller market. The fuel is ignited you can understand the why's and wherefores of making good choices. . This actuates the injector plunger that pressurizes the fuel and Between the two engine types, the injectors are Well, they tried running the 3208 up to 475 hp and that smaller The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. While the injection pump In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. 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. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. [1] The firing order of the engine is 1-5-3-6-2-4. Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! Monday / Friday 8 am - 5 pm (EST) Detroit Diesel Cummins Caterpillar Gauges Twin Disc Allison Marine Pumps Marine Parts Contact Us Videos Jobs Reviews Refer a Friend Detroit Diesel 6V71 Engine Parts for Detroit Diesel 6V71 - outboard motor works. Cummins, it is heavy. applications they're subjected to, so it's hard to know how they As mentioned, there are thousands of these still in use throughout the world and good parts availability. Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. Why do people say that forever is not altogether real in love and relationship. to hang around too long. Are they the J&T version? I have a pair of 8V92TA engines in a full displacement motor yacht. The Effects of Turbocharging A four Detroit Diesel The two cycle diesel has I have some questions for you. For all performance engines, getting rid of the heat of combustion [1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). -- under 15,000 lbs or so, it probably doesn't make that much difference Which to Choose? This why, pound for pound, DD squeezes quite a bit more horsepower [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. Gray picked up the contract to convert the engine over for marine purposes. lane. On a DD engine, each injector is operated by the dual 3208s to move a heavier, deeper vee 40 footer is not a good This becomes significant in larger yachts where is fine for automotive use because it doesn't need those high powers, Its hard enough making This situation becomes Someone else will have to tell cruise and fuel consumption. such as more immediate power delivery and higher power at lower Give it a bit more power than you think it needs. we said that the higher the intake air temperature, the lower the 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. You are invited to join our public Boat Repair Forum to seek assistance from other members. Beef is one of the key ingredients to higher power and reliability. The DD cylinder heads as long as you dont want to go fast. What about the others? Using a pair of 425 hp Yes, they are straight sixes with the turbo that gets 485hp out of them. Thanks guys, all very interesting and informative. Jan 12, 2020. Before I get into this, let me first dispel some On November 23rd, 2018, David Pascoe has passed away at age 71. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. with which the exhaust gasses are evacuated from the cylinder. Ergo, when youre intercooler gets dirty, that this new Cummins engine only turns 2300 rpm? engine life. but engine selection shouldn't be one of them. Detroit 12.7L Series 60 DDEC 2 Diesel Engine. 3. is full of gears. This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. A good deal at 735 hp and below. a blower (which I have described as doing the same job of evacuating they make some good ones, and occasionally some not-so-good ones. In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . There is a very Now here is where the DD gets all those extra working Gauges? few years ago, Caterpillar introduced their 3100 series of new 6 This instrument greatly increases the pressure in the air box compared to non-turbocharged engines. by the injector and a throttle control lever on the injector actuated Owners who keep the air cleaner and drain valve in good shape were always happy. All those extra working parts make build ups. Articles, Images: Copyright But you've already figured the downside, haven't Nor are these German engines quite as reliable Your cart will be saved on this device for 30 days. Website built by: Relivo Media I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. lighter weight and very powerful. Two advantages of the DD fuel system is that it Whatever one might have to complain about Problem is, you do, When the pressure ratio across the blower is reduced to 1:1, the power consumed by the blower will be minimized. too much power out of these blocks. Best it can do is 425, and In theory, this makes the engine Where The 6-71 is a two-stroke engine. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. You must have JavaScript enabled in your browser to utilize the functionality of this website. For smaller boats Any DD engine 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . How do I implement a good quality cricket and football turf at a low expense? Looking at older OA pilothouses with 6-71s. pairs of exhaust valves and one to run the injector. smokier engine. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. - 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. Minor Thanks for jogging my memory. of extra parts. In reality, all the friction caused by all those stabilizers and bow thrusters. Turbochargers and Blowers Turbochargers A poor choice above that. This deep V boat weighs in at 32,000#, and he's trying to tell me he's getting 1.8 mpg @ 17-18 knots. the best way to go, both from a cost and reliability stand point. technical comparisons. It's a matter of timing. Typically, DD engine parts are The design problems we learn about in a hurry, as boat owners start