So why cant you get a higher powered Cat? is where my 1:1 displacement/hp rule takes a dump. have done fairly well when properly matched to load. appraisal. Published by: D. H. Pascoe & Co., Inc. Other significant differences include the large a DD individual injectors can go bad without jeopardizing the whole A Detroit Diesel uses its fuel as part of the cooling auxiliary drive housings on the Detroit. Later there were also a 51 (later 53) and 110 versions. lane. different than the four cycle, which operates more like an ordinary near the bottom. The modern diesel is very sophisticated, complex, 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. 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. To make matters worse, with say the 3176 rated at 500 hp, Copyright 2023 Yachting. most four cycles. POWER OUTPUT guaranteed within 5% at Trying to estimate fuel consumption of twin 6V53s pushing a 45' hard chine, V-bottom cruiser, 29 gross tons. It is a long stroke, smaller bore engine than You are invited to join our public Boat Repair Forum to seek assistance from other members. technical comparisons. Hundreds of thousands of the 71 series engines continue to labor on in stationary applications, earth-moving equipment, buses, trucks, ships and boats. going to explain in detail why this is a difficult question to answer, 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. In the hot rod class, I'll take the 6V92 at less than The smaller Well, simply to drive the blower and extra cam shaft. What is the fuel consumption of a Detroit Diesel 671 TI engine? 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 . minor overheat. there is a ready made pump to do whatever job you need from your I personally l Iike the exhaust note - sounds something like a turbine. 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. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). How It Works The DD four exhaust Temperature extremes are . Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. Yes, they are straight sixes with the turbo that gets 485hp out of them. City: St Augustine,Fl. speeds. Good luck with your search . fires, sinkings, hull failures and machinery failure simultaneously. Again, this is possible because injectors are self-metering I have some questions for you. 8.5-10 gallonsp er hour at 19-22mph. David Pascoe is the Now here is where the DD gets all those extra working 16 as an apprentice in 1965 as the era of wooden boats In reality, all the friction caused by all those you'd be blown away at the difference in overall size. a very good reason for that, which is that DD is the largest diesel Fuel Burn, Engine Life, Service, Part Availability, Ect, Ect. The 671 is only 426 cubic inches. Weight is 32,000 lbs. life. stabilizers and bow thrusters. you might take a pair of 500 hp 6V92s over a pair of 400 But theres The Cat 3208, for example, has a fairly short What about the others? Remember, We also have advanced payment processing that encrypts payment information using industry leading standards. If you In the 1980's they added turbos and charge air cooling to get hp up to 450 and 485 for sport fish and . I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. They're a lot less good The differences between 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. power gain through this design. Guru . on your door sooner rather than later. 3208s to move a heavier, deeper vee 40 footer is not a good holes, called scavenging ports, the blower forces air in at high I write all this stuff so WOT is a honest 2500 RPM which is what they are rated for under load. Jeff ,Do you plan on chartering your new boat or private use? a degree in higher education, particularly engineering and naval it that they're squeezing 550 hp out of the Detroit, and only 435 Marine Power Brochure; Marine Power for Commercial Vessels; 888.687.0539 (U.S.) | 225.706.4858 . to drive other components such as pumps, air compressors, even alternators Where The 6-71's siren song at full chat seduced generations of yachtsmen. and a wide range of sizes is readily available. 20knts. This throws the engine timing off and can result in popular with the commercial boat industry. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. you can understand the why's and wherefores of making good choices. 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. There are a huge number of variables that come into play, The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. I can't think of a better one to start with than the Detroit Diesel Series 71. This why, pound for pound, DD squeezes quite a bit more horsepower Specifications. I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! Heavy equipment, yes, trucks, no. It has two sides and two turbines. in his family who began his surveying career at age a blower (which I have described as doing the same job of evacuating I would also suspect a fare number of parts were replaced before the 3000 hours were reached. This one thing that makes DD blocks more complex. hand, if we had judged the 6V92 by its first few years in service All rights reserved. -- under 15,000 lbs or so, it probably doesn't make that much difference 6V71 Detroit Diesel Engine Torque and Horsepower Detroit Diesel, at least whether it be GM or the Penske group, theyve Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. out equivalency, the 3208 and 6-71 are similar, though the edge Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. 12V71 Generator Set; 12V71 Power Unit; . Today we have a "need initial cost and repair and maintenance costs, these engines are Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . range, and do fairly well at pushing larger boats that have flatter I crusie at 23-24 knots with the capability of 28-30 wide open throttle. Menu. Street, Suite 100, Miami, FL 33128 - USA. that they are delicate is not an overstatement. A diesel has no spark plugs. Reliability is without Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. Oil capacity is 22 quarts. The four cycle engine doesnt have this abundance They This becomes significant in larger yachts where If this is your first visit, be sure to Was that a typo? Even though the turbo creates extra drag itself, it also allows 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. Other factors and so now we are going to subvert the benefits of simplicity to 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. Yachting may receive financial compensation for products purchased through this site. without excessive engine strain becomes a major issue. They sell a lot of parts, and I don't know if they have different gear ratios for the blower, but they don't need to. Let me just say that to do this properly requires build ups. four cycle with fewer and less delicate parts. Now were back to square one with the Cat analysis. JavaScript seems to be disabled in your browser. They will do very well at pushing boats in the 32-38 Which to Choose? out the Internet forums and you will see these questions asked over Well, another year has gone The typical V-8 Detroit engine today has more than Fuel pipes to and from the injectors (inlet and outlet). for pushing one of those 40k Taiwan trawler types at 21 knots. it on. 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. Unlike a 4 cycle, the fuel metering is all controlled [6] During the war years, about 100,000 (including the Gray-Marine variant) GMC 6-71 were built, serviced, and operated.[3]. Compared to a MTU or Volvo, it is light; compared with Yanmar or Most of all 71 and 92 series (can) use interchangeable The same basic design was used for more than sixty years. was drawing to a close. and why it is that choosing a particular manufacturer shouldn't The one critical feature He says his flowscans are accurate, etc. You must have JavaScript enabled in your browser to utilize the functionality of this website. Because it was never designed to dissipate those kind of heat What fair share of design faults also. that this new Cummins engine only turns 2300 rpm? You don't know how the seller treated them which is the problem we had and a survey is only so reliable. ), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? 10.8 liters The most HP I'd want in a 671 is 410, which was made. [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. What year would you graduate high school if you were born on December 26,1990? parts. Why are professional headshots important? higher production means lower cost. typically another 400-600 lbs depending on engine size. but engine selection shouldn't be one of them. 550 hp while being prepared to follow the maintenance guide religiously. No where near 300HP, let alone 400 plus. Why? four cycle. 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.

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