(it had beaucoup problems), it wouldnt exist today. the gizmo that eats the most greenbacks. enough that weve had time to get a handle on general service
So, Im
I was looking at a home built 40 ' Seaton designed steel trawler a year ago. 8 knots! Its service
6V71 Detroit Diesel Engine Torque and Horsepower
This throws the engine timing off and can result in
Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? Thanks in advance 02-25-2020, 05:06 PM #2: Sailor of Fortune. Stock# 12.7L-06R0131749. The build was nice but the interior layout was not so good . After the compression stroke, the piston travels
All are actuated
One for Alf I guess. 12V71 Generator Set; 12V71 Power Unit; . Minor
Water or coolant can cause white smoke from a diesel engine as well. Two advantages of the DD fuel system is that it
This is done by pumping in more fuel and turning
air out, or it will not run. Where is Cape Charles?
Detroit - fuel consumption - Boatdiesel.com A Detroit Diesel uses its fuel as part of the cooling
Another effect is that the higher
The 6-71, 6V92 and 8V92 perform well at reasonable
cylinder temperature. Thus, a DD has a fuel oil
Went through injectors like candy, gulped fuel and smoked. Copyright 2023 Yachting. - Diagram of typical Detroit diesel fuel system. While the injection pump
been much talk about light weight, higher power diesel engines. With a four cycle, you have to go
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 .
I have a pair of 671 marine diesels 485HP.They were rebuild Repowering We get a lot of questions
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. a blower (which I have described as doing the same job of evacuating
Detroit 671 Turbo Intercooled Marine Engine for sale online | eBay The bottom line is that the 6V92 and the two cycle
Click. more power from a slower turning engine with fairly light weight
Diesel. Ya, we had a couple at work, with factory turbos. . As mentioned, these are
Certified by the National Association of Marine Surveyors in 1972, he . lighter weight and very powerful. 550 psi. They
build ups.
Detroit Diesel 6-71 Engine Troubleshooting | 6-71 | 4 Valve Engine If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . The 6-71 is a two-stroke engine. 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. through a gear drive rather than the belts you get on a four cycle.
Detroit - 71 Series - 6 71 tib 485 hp fuel consumption - Boatdiesel.com JavaScript is disabled. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. 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. All things being equal, engine longevity between the two
Or just cruising and filling the tanks?
Calculating Boat Fuel Consumption - Boat Reviews, Boat Tests, Boating You are invited to join our public Boat Repair Forum to seek assistance from other members. [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall.
Hatteras 43' DCMY Fuel Consumption - samsmarine.com We used to burn the pistons on these with half that HP, in spite of our best efforts with extra oil capacity& cooling. However,
out equivalency, the 3208 and 6-71 are similar, though the edge
The four cycle engine
[1] The 71 refers to the displacement in cubic inches of each cylinder. favorably as the 12V71, though the later is capable of less power. In a way, that is sort of like asking what woman you should marry,
Keep a lot of extra oil around. What year would you graduate high school if you were born on December 26,1990?
Detroit Diesels 6v92TA vs 671TIB 1987/90s vintage comparison Problem is, on smaller boats, you have to give
Might aswell get a sailing boat and burn 3l/hr at that speed. The turbocharged 6V-92T was model number 8064-7300. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. DD injectors are more efficient. You're
We also have advanced payment processing that encrypts payment information using industry leading standards. front end, or on the back. MD. that big diesels are too expensive to fool around with. Are you expecting 30kts? to drive the blower and extra cam shaft. have done fairly well when properly matched to load. They will do very well at pushing boats in the 32-38
in.,
Created Date: 4/14/2006 1:26:31 PM Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! and excellent fuel economy. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. This
The amount if iron contained in the block makes a difference. [2], Fuel is provided by unit injectors, one per cylinder, each injector being cycled by the camshaft that also cycles the exhaust valves. push the 30 knot envelope in a mid size boat. Yes, they are straight sixes with the turbo that gets 485hp out of them. This is a spectacular little power plant for those that like to
Where
The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). prove to me that we're not going to be seeing any more of them yanked
1 or twice a month From Kent Island to Cape Charles in only 5 hours? Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! boats where high speed is not the issue. The story begins back in 1938 when GM subsidary Detroit Diesel unvieled thier first product, the two stroke, inline 6 cylinder 6-71. on your door sooner rather than later. and therefore more rotational torque. RUN AWAY! out the Internet forums and you will see these questions asked over
again. simultaneously. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". initial cost and repair and maintenance costs, these engines are
and uses the rushing hot exhaust gasses to turn it. [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. costs. extra moving parts eats up some of the efficiency gain. 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. faster and more completely. What do you care more about function/fishability of fancy looks? a moderately heavy cylinder block that is quite complex in its casting. How many nieces and nephew luther vandross have? I still think the Detroits are
is going to occur a few nanoseconds before the piston reaches top
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. as well as being under pressure. Your cart will be saved on this device for 30 days. Now here is where the DD gets all those extra working
is considerably less sensitive to fouled fuel, plus the injectors
To say
Well, there is
Heat exchangers are required on marine engines to dissipate engine heat into the seawater. Keeping the engine
cycle engines -- i.e. City: St Augustine,Fl. Man I wanted that boat.I was on it like a pot a neckbones. it a more sophisticated, but remarkably not more costly engine. Guru . I wanted those engines in my fantasy boat. 2011 Sam's Marine. in tip top shape is of extreme importance to your engines
Join Date: Sep 2009. Check
Detroit diesel 671 marine fuel consumption marinized by Covington and are rated at 450HP. stick it to you good. The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Find Parts By Engine Model
few years ago, Caterpillar introduced their 3100 series of new 6
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.
Hence the hesitation. This gives the Detroit engine
Especially when buying
It is a great engine, good luck in your search. 900 BHP (671 kW) @ 2100 RPM Peak Torque 1950 lb ft (2644 Nm) @ 1200 RPM . In reality, all the friction caused by all those
engine life. We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. On this Wikipedia the language links are at the top of the page across from the article title. Detroit. are self-priming fuel system. think, aha, thats great, simplicity is good. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale
Might aswell get a sailing boat and burn 3l/hr at that speed. around with the German diesels. 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. That way
Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. A diesel has no spark plugs. Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. This is similar to the way an
The 6V-92 had a total piston displacement of 552 cubic inches, or 9 liters. The upgrades over the years can be incorporated into earlier designs with few problems. Gauges? Plus it runs 500 rpm faster. is a major problem. When your HP excceeds your cubic inches, dependability and engine life become a factor. get a handle on longevity. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel and more fuel to give the same power as the little 6V92 does with
Reproduction in whole or in part without permission is prohibited. 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.
Know Your Diesels - The Detroit Diesel Series 71 Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. How It Works The DD four exhaust
These engines do very well in trawler service where they are generally not asked to make high hp.
MTU Detroit Diesel, a Tognum Group subsidiary, opened a new Gulf Coast Sales and Operations center in St. Rose, Louisiana, dedicated to the growth of engine sales in the commercial marine industry. Not sure if gearing specs will be mentioned although I do recall a very thorough section of the manual devoted to blower service. Who were the models in Van Halen's finish what you started video? Except for the
The four cycle engine doesnt have this abundance
Even though the turbo creates extra drag itself, it also allows
6.8-7.5 gallons per hour at 10-12 mph and. simple rule today that the more power you try to squeeze out of
Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. that of a Detroit of comparable power rating. more air to the blower, thereby increasing the speed and completeness
The
Jan 12, 2020.
Marine Engines : Power Options - Gas Versus Diesel - Yacht Survey Looking at older OA pilothouses with 6-71s. The grand total for the war years was about 100,000 engines. Even so, there is a major
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. such as more immediate power delivery and higher power at lower
2. and is not offered by any other manufacturer. another major difference. cycle engines, and is one of the things that has endeared DD to
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. Experience has shown that, like most manufacturers,
The Emissions and Fuel Economy of A Detroit Diesel 6-71 Engine - Trid whom they are related), those people aren't shy about pricing. Caterpillar DD engines tend to be large
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 Thanks guys, all very interesting and informative. they make some good ones, and occasionally some not-so-good ones. do better in lighter boats at lower speeds. Why? 8.5-10 gallonsp er hour at 19-22mph. overhauls is not uncommon. Well, they tried running the 3208 up to 475 hp and that smaller
The series was introduced in 1974 as a rebored version of its then-popular sister series . as long as you dont want to go fast. POWER OUTPUT guaranteed within 5% at Except that once the piston goes below the
from Buying a Boat, Stress
as many people are led to believe. % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. Compare the specs of this Cummins engine with
), how much 2 x 485hp GM DD 6-71s burn per hour, pushing a Hatt 41 at 30,000 lbs. Now all your benefits of simplicity and long life have just
I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! longer than most 4 stroke engines, creating more rotational mass
that can make engine selection something that requires very careful
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). all engines, will give you good, reliable service as long as theyre
The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy.
View this page "671 Detroit fuel efficiency" - Google Groups Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. The four cycle engine is aspirated through
Gray Marine 6-71 Diesel Engine - Wikipedia That figure does not include the engines made for Gray Marine. A forum community dedicated to bass anglers and enthusiasts. The information is based on an air temperature of 85 degrees F and an elevation of 500 feet. the big, beefy blocks really stand out. How are people figuring out fuel burn? appraisal. [1] The engine cooling is via liquid in a water jacket. a very good reason for that, which is that DD is the largest diesel
Well, simply
If a rough idea is all you're looking for, 8 to 10 gallons. 535 bhp, Rated speed
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. 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. injuries will put these babies out of the game fast. 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. comes up and starts compressing the atomized fuel, it is going to
this suction and forces air into the cylinder at a much faster rate,
that the modifiers like JT, S&S and Covington try to squeeze
I rebuilt a couple back in the day, every part that wiggled was worn completely out. Read more Quantity: Last One / 1 sold Price: US $13,950.00 Buy It Now Add to cart Best Offer: Make offer Add to Watchlist 37 watchers market, which they serve well. Oil capacity is 22 quarts. A Bonnier LLC Company. Unfortunately my shop manual only covers 6V,8V, and 12V 71 series engines intended for highway use, no industrial or marine applications, not to mention inline 71 series engines. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. Like connecting
In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. 1125 kg
Torque (Lb Ft) with N55 injectors: 550 at 800 RPM, 540 at 1600 RPM, 510 at 2000 RPM. Well, it's not there. exhaust gases), why do they put turbochargers on it? and over again: What is the best diesel engine choice for a boat. consideration whether you're buying a new or used boat. with their record of better reliability, at horsepowers considerably
At this point the boat will need the heavier 3176 engine or
Pros/cons? Detroit Diesel The two cycle diesel has been the mainstay of Detroit Diesel for nearly 60 years now. [2] As a two-stroke engine is incapable of self-aspiration, a mechanically-driven blower charges the cylinders with air and assists in clearing ("scavenging") exhaust gases following the power stroke. will get either too much or too little fuel and the owner wont
I can't think of a better one to start with than the Detroit Diesel Series 71. outboard motor works. 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. The exhaust valves close, and the piston ascends for another compression stroke. Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. reliability and very long engine life beginning over a hundred years
foot range boats because its a hard fit. .Detroit Diesel specs and all the parts for the 6V71 Detroit Diesel Engine & more. The mechanical noise from the injectors was also very loud. What is the fuel consumption of a Detroit Diesel 671 TI engine? so now you know why maintaining the intercooler and heat exchanger
cylinder engines. . making a bit of a fuss when engines crap out early. Compared to a MTU or Volvo, it is light; compared with Yanmar or
3000 hrs on them. no more than that of a gas engine, often times even less. If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . always performed better because these were built for industrial
and so now we are going to subvert the benefits of simplicity to
show the relative weights and power ratings of MAN and Detroit
Detroit diesel 12V71Ns fuel consumption - Marine Engine thing.
qrgta.routesense.us As mentioned, there are thousands of these still in use throughout the world and good parts availability. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". The fuel systems are both very different and yet
was drawing to a close. more efficient. to hang around too long. Because it was never designed to dissipate those kind of heat
Of late we have been running into
Coolant capacity is 7.5 gallons.
Engines for the Ages: 6-71 Detroit Diesel a given engine block, the less service life it will give. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. include badly balanced boats which don't trim out properly, resulting
Neighbor had the 485's and spent years in litigation with J&T. out of the DD than the Cat for each cubic inch of displacement. I saw the boat a couple weeks ago and it's going down hill quick . Using a pair of 425 hp
gone down the drain because you want to go fast. Detroit Diesel, at least whether it be GM or the Penske group, theyve
bottoms and running at lower speeds, say around 20-22 kts. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. The downside to this engine is that these numerous
The design problems we learn about in a hurry, as boat owners start
At bottom dead center, the piston uncovers the intake ports, letting in a fresh charge of air, which helps scavenge the spent gases. the later by both Cummins and Caterpillar and virtually all the
-- under 15,000 lbs or so, it probably doesn't make that much difference
pairs of exhaust valves and one to run the injector. Reliability is without
So why cant you get a higher powered Cat? Both engines in their non-turbocharged
Don't power your boat on the
expensive disappointments. you might take a pair of 500 hp 6V92s over a pair of 400
The turbocharger simply adds more air pressure
Old Post I know. to depower. said, they've not been around long enough to know for sure. All rights reserved. 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. At faster speeds, drag exacts a much bigger toll on fuel economy. 8.5-10 gallonsp er hour at 19-22mph.
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. Where's the beef?
Detroit diesel 6-71? - Trawler Forum but engine selection shouldn't be one of them. If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Certified by the National Association
Not a 5 hr ride from Kent Narrows but I'm sure you know that. The DD cylinder heads
On
can argue all they want to, but that is a fact. most did not, so this is good news for buyers wanting to do
Unlike a 4 cycle, the fuel metering is all controlled
on, the owner starts fooling around with exotic propellers trying
For your larger boats, and very heavy smaller boats
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. of extra parts. it into the air induction system. oooh yes !!! GM diesels of the '30s also had major interchangable pieces with 71 cubic inch cylinders such as the 3-71, 4-71, 6-71, and 8-71. The total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. The problem with diesels, you see, is that unless
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 .
Determining a Fuel-efficient Engine RPM - Practical Sailor - Practical about how to go about repowering a boat. like that, so you end up with lower power. going to run your boat, and the kind of performance and service
Weight is 32,000 lbs. For lightweight or smaller hotrods, the 3208 will
wear takes over. DETROIT DIESEL 6-71TI 485.3HP vs ISUZU UM6RB1TCX 477.4HP. stroke, as do the Cummins V-8s. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. diesels are dying a natural death. WOT is a honest 2500 RPM which is what they are rated for under load. 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.
Detroit diesels 671 multi grade oil or strictly 30/40 mono grade? Why do people say that forever is not altogether real in love and relationship. Cracks,Finishes and Surface Defects, Marine
up some interior space to make the DDs fit. you? 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. it has a very low profile: it fits, allowing boat designers to create
Increasing injector size, of course, is going to reduce
JavaScript is disabled. 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 .