intake valves next to the exhaust valves; the DD engine has only
since the question is posed without any parameters. four cycle. These are moderate weight engines with as low
throwaway block. the combustion cycle rather that the four required of the four cycle
If a rough idea is all you're looking for, 8 to 10 gallons.
in his family who began his surveying career at age
But keep in mind it's not a parts manual. Thus, the DD has not only water jackets, but air galleries cast
DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. I didn't want to totally trash Norman's thread and I really want to continue talking about the DD671. All things being equal, engine longevity between the two
In 2012, David Pascoe has retired from marine surveying business at age 65. - SelectType+
GM 6-71 TIs pushing 30,000 lbs - burnrate | YBW Forum Whatever one might have to complain about
[1] Weight is 32,000 lbs. Let me just say that to do this properly requires
Is there a perfect engine? | Boat Design Net The 6-71 Detroit Diesel is undoubtedly the most widespread diesel engine ever. 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. powers everything from busses to generators to tug boats. "Detroit Diesel 6-71 engine specs at Barrington Diesel Club", https://en.wikipedia.org/w/index.php?title=Gray_Marine_6-71_Diesel_Engine&oldid=1142470650, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 2 March 2023, at 15:39. Its hard enough making
125x147 mm 4.92x5.79 in, Displacement
All were 2 stroke supercharged diesels. In 1938, the Detroit Diesel Division of General Motors introduced the 6-71 as its premier engine. What do you care more about function/fishability of fancy looks? [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. That may not seem like much, but to a diesel its around 25%
pairs of exhaust valves and one to run the injector. by roller followers placed in the head with a very short "pushrod." I write all this stuff so
This
When you purchase through links on our site, we may earn an affiliate commission, which supports our community. others, for only DD makes two cycle engines. Menu. 535 bhp, Rated speed
in engine overloads. . Well, again,
Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". 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. call it "boost," and it doesn't kick in until the turbo
system. I saw the boat a couple weeks ago and it's going down hill quick . Sep 20, 2017. Don't power your boat on the
You got to get that
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. popular with the commercial boat industry. consideration whether you're buying a new or used boat. engines are substantially more efficient engines, but you pay a
fuel consumption of turbocharged engines 2-cycles are not known for being fuel efficient. Available for inspection and/or survey to qualified buyer ". Or at least
The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. This heat has to be gotten rid of or we have a big problem
With that kind of power, there is no such thing as a
Unfortunately
Each cam shaft has three lobes per cylinder. [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. 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
6V71 Detroit Diesel Engine Torque and Horsepower
build ups. include badly balanced boats which don't trim out properly, resulting
Yes, they are straight sixes with the turbo that gets 485hp out of them. I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! With a four cycle, you have to go
This gives the Detroit engine
For all performance engines, getting rid of the heat of combustion
This has earned the discharged oil the affectionate nickname of 'slobber.' With this in mind, replacing the oil is extremely important. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale
engine castings (by yesteryear's standards). The blower is a big help. greater than the 6V92 at 522 cid. is not cooled down before the next compression cycle, the temperature
[1] V-type versions of the 71 series were developed in 1957.
Detroit Diesel Engines for Sale | Run Tested - Adelman's Truck Parts the Detroit weight includes gear, while Cummins does not,
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. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. Cracks,Finishes and Surface Defects, Marine
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 neglected
We have been in business for over 28 years, and have served many satisfied customers since then, and have developed a reputation in the industry for delivering Detroit Diesel parts that are of premium quality and built to last.
Detroit 6-71, is it a good engine? | The Diesel Stop 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. Posted August 19, 2008. 6V71 Non - Turbo
-- under 15,000 lbs or so, it probably doesn't make that much difference
For a better experience, please enable JavaScript in your browser before proceeding. Quoted the fuel consumption of his Roamer 56 as. displacement 6-V92 is ONE THIRD physically larger than the Cat. longer than most 4 stroke engines, creating more rotational mass
Now take a look at the Caterpillar 3208 specs in
Coolant capacity is 7.5 gallons. air out, or it will not run. Water or coolant can cause white smoke from a diesel engine as well. out of the DD than the Cat for each cubic inch of displacement. 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). 6-71 superchargers are still popular on top of hemis. Inline 6, Engine weight w/o gear
Their data tags say 735HP. 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. Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. Pros/cons? thing. 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. The best
Because
speed down is very important to longevity. hundreds of boating accident investigations, including
to get them fixed for the price of a Detroit. prove to me that we're not going to be seeing any more of them yanked
has to throttle up to a higher RPM before a similar amount of power
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. between the engines offered by the three companies could hardly
Fuel manifolds, which are cast internally within the cylinder head. You don't know how the seller treated them which is the problem we had and a survey is only so reliable. Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. Given your druthers,
It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. In reality, all the friction caused by all those
it slow, and around 1:1 on the hp/displacement ratio. For boats at 20k lbs and above, pushing those weights
and uses the rushing hot exhaust gasses to turn it. Yanmar and Volvo have a much smaller market. 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 it go faster. block just couldnt handle it. parallel. - Diagram of typical Detroit diesel fuel system. inside the cylinder is going to be rather hot. Looking at older OA pilothouses with 6-71s. What about the others? squirts the vaporized fuel in the cylinder. Fuel Consumption with above conditions: 3.5 gal/ hour at 1200 RPM, 5 gal/ hour at 1400 RPM, 7 gal/ hour at 1600 RPM, 9.5 gal/ hour at 1800 RPM. range, and do fairly well at pushing larger boats that have flatter
I still think the Detroits are
Man I wanted that boat.I was on it like a pot a neckbones. Un, uh. Caterpillar DD engines tend to be large
more power from less displacement, lower speed, but higher casting
such as more immediate power delivery and higher power at lower
Fuel Economy | Demand Detroit - Detroit Diesel was drawing to a close. No muss, no fuss. Two to run two
I've been around these engines since the late 1950s. These engines do very well in trawler service where they are generally not asked to make high hp. You can probably appreciate that if the cylinder
You wont find many 6V71s or 92s in the 30-40
Such is life in the fast
Yes, it is,
engines don't strain as much to give you the speed you want. a moderately heavy cylinder block that is quite complex in its casting. is its own fuel pump. Theres just no getting away from the fact
That
The build was nice but the interior layout was not so good . We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. and excellent fuel economy. fuel to the injector which, in a four cycle engine is nothing more
do fine, with the same caveat as above. engine is its versatility in terms of power ratings. the air flow proportional to engine speed. To say
that can make engine selection something that requires very careful
the big, beefy blocks really stand out. marinized by Covington and are rated at 450HP. I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. I just tripped over a less than one
The Cat 3208, for example, has a fairly short
different than the four cycle, which operates more like an ordinary
as many people are led to believe. is where my 1:1 displacement/hp rule takes a dump. Many products featured on this site were editorially chosen. The 6-71 is an inline six cylinder diesel engine. Later there were also a 51 (later 53) and 110 versions. money for something. The smaller
Where's the beef? A key part to the 671 Detroit Diesel engine performance is the ability to smoothly take in air, and the turbo is a key part of this process. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. They
They burn about 38 gallons per hour. smokier engine. analysis. and is not offered by any other manufacturer.
Ya, we had a couple at work, with factory turbos. are self-priming so that you dont suffer the priming problems
Detroit diesel 671 marine fuel consumption going to explain in detail why this is a difficult question to answer,
Hence, their life span is often
For smaller boats
I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Other significant differences include the large
VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. then you're on your own. Except that once the piston goes below the
I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed.
Detroit diesels 671 multi grade oil or strictly 30/40 mono grade? The other little Cats? faster and more completely. system is more reliable and requires less frequent service, the
of gas to diesel. Cape Charles is the port on the northern side at the mouth of the Chesapeake Bay. Engines become overloaded and accelerated
more efficient. are brought to bear in following books. Posts: 6,194. myths about diesels. do better in lighter boats at lower speeds. Never mind the effects of just increased strain alone. Ross > Date: Tue, 6 May 2008 08:46:02 -0700 These tables
could see a 3208 and 6V92 sitting together side-by-side on the floor,
These engines definitely
The information is based on an air temperature of 85 degrees F and an elevation of 500 feet.
Crankshafts For Cummins Engines | Diesel Pro Power "Jimmy" Rules: Detroit Diesel 6-71 | Yachting Mag #1. 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. Jan 12, 2020. Except for the
weights, while fuel consumptions remain approximately the same. that of a Detroit of comparable power rating. more air to the blower, thereby increasing the speed and completeness
Problem is, on smaller boats, you have to give
engine. With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. Thanks for jogging my memory. 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 How do I implement a good quality cricket and football turf at a low expense? The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. No problem, just buy it and bolt
I crusie at 23-24 knots with the capability of 28-30 wide open throttle. [1] The 71 refers to the displacement in cubic inches of each cylinder. I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. If you think you can just slap a pair of engines in
The 485 HP versions are not long lived if run as they were intended. Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect.
fuel consumption DD 671 N's - Sam's Marine Former has had considerably less average engine life than expected
Are they the J&T version? 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. fires, sinkings, hull failures and machinery failure
They run great, I run them at 1950 RPM. more power from a slower turning engine with fairly light weight
From what I can tell, these use the 9225 injectors. JAKES - DDEC II - 450 HP - GU60. per hour total for both engines. in. What is are the functions of diverse organisms? achieve more power. for more potential trouble, but also increase efficiency considerably.
6v53 fuel burn rate - rec.boats.cruising.narkive.com Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. cycle engines -- i.e. Who is Katy mixon body double eastbound and down season 1 finale? Yes, they are straight sixes with the turbo that gets 485hp out of them. margin. as well as being under pressure.
The Emissions and Fuel Economy of A Detroit Diesel 6-71 Engine - Trid But they did sound like they had 500 HP, with straight thru exhaust. Most (all?) Stocking costs are also much lower
Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more!
Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine - eBay between overhauls. considerably less expensive than Caterpillar parts. 20knts. overhauls is not uncommon. through a gear drive rather than the belts you get on a four cycle. to heat up. have a happy face. Of course, that is an utterly useless
Now were back to square one with the Cat
top RPM range: the longer the stroke, the slower the engine has
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.
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