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Topic: Dual overhead cam

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	Dictionary of Automotive Terms Abbreviations
		cam lobes move it upward, it opens the valve.
		A shaft with cam lobes (bumps) which is driven by gears, a belt, or a chain from the
		A type of dual mounting wheels where two demountable rims are mounted directly on the spoke wheel and drum assembly held apart by a spacer band and locked in place by clamps and nuts which attach to studs in the spoke face.
	www.motorera.com /dictionary/CA.HTM (8783 words)

	Overhead Camshafts - Wikicars
		The cams operate the valves directly or by a short rocker as opposed to overhead valve cam-in-block engines, which have tappets and long pushrods to transfer the movement of the lobes on the camshaft in the engine block to the valves in the cylinder head.
		A double overhead camshaft (also called double overhead cam, dual overhead cam or twincam) valvetrain layout is characterized by two camshafts being located within the cylinder head, where there are separate camshafts for inlet and exhaust valves.
		Double overhead camshafts are not required in order to have multiple inlet or exhaust valves, but are necessary for more than 2 valves that are directly actuated (though still usually via tappets).
	wikicars.org /en/Overhead_Camshafts (603 words)

	Overhead camshaft - Wikipedia, the free encyclopedia
		Single overhead camshaft is a design in which one camshaft is placed within the cylinder head.
		The cams operate the valves directly or by a short rocker as opposed to overhead valve pushrod engines, which have tappets and long pushrods to transfer the movement of the lobes on the camshaft in the engine block to the valves in the cylinder head.
		A double overhead camshaft (also called double overhead cam, dual overhead cam or twincam) valvetrain layout is characterized by two camshafts being located within the cylinder head, where there are separate camshafts for inlet and exhaust valves.
	en.wikipedia.org /wiki/DOHC (600 words)

	Camshaft - WOI Encyclopedia Italia
		Sliding friction between the surface of the cam and the cam follower which rides upon it is considerable.
		In order to reduce wear at this point, the cam and follower are both surface hardened, and modern lubricant motor oils contain additives specifically to reduce sliding friction.
		The surfaces of the cam and follower are designed to "wear in" together, and therefore when either is replaced, the other should be as well to prevent excessive rapid wear.
	www.wheelsofitaly.com /wiki/index.php/Camshaft (633 words)

	Camshafts Part II - Single Overhead Cam, Dual Overhead Cam and Pushrod Engines
		On single and double overhead cam engines, the cams are driven by the crankshaft, via either a belt or chain called the timing belt or timing chain.
		This is the same as a double overhead cam engine because the engine has dual overhead cams just like in a double overhead cam engine.
		The overhead camshaft, which eliminates the pushrod from the system, is one of the engine technologies that made higher engine speeds possible.
	www.streetracersonline.com /articles/camshafts/2.php (664 words)

	Kawasaki Dual Sport Bikes from Paradise Motorsports in Pueblo Colorado (Site not responding. Last check: 2007-09-06)
		While dual purpose motorcycles are designed for both street and off-road riding, the KLR650 adds long-distance touring to its repertoire.
		The mighty KLR650 is powered by a strong, dual overhead cam, four-valve 651cc liquid-cooled engine that is tuned for exceptional low and mid-range power.
		Dual overhead cams operate four valves in a compact combustion chamber to allow performance-enhancing compression ratios without detonation on today's pump gasolines.
	www.fun2ride.com /kawasaki_motorcycles/dual_sport_bikes.htm (601 words)

	MotorSports Digest
		The down sides of the overhead cam design are increased and awkward maintenance, occasional larger size, and all too often higher costs.
		A perfect example of lost potential in an Overhead cam engine is found in Ford's new 4.6 liter engine - that is when compared to the 5.0 liter pushrod engine it replaced.
		There is said to be a lot of potential in the Cobra "dual" Overhead cam engine, but again, no one wants to look for it, especially at it's high price.
	www.motorsportsdigest.com /articles/scams2.htm (2369 words)

	Basic Understanding of Camshafts - Tech Article - Chevy High Performance Magazine
		As an example, Howards Cams' small-block hydraulic flat-tappet Max Torque camshaft (PN 112021) Chevy measures 222/232-degree duration on the intake and exhaust, respectively at 0.050-inch lobe lift, whereas the advertised duration is 288/302 degrees.
		The cam's centerline specification is used to determine the position of the lobes on both the cam and as installed in the engine.
		Most cam companies include an intake centerline number, which is the position of the intake lobe centerline (in crankshaft degrees) relative to top dead center on piston number one.
	www.chevyhiperformance.com /techarticles/148_0505_camshaft_basics/index.html (2075 words)

	DOHC@Everything2.com
		A Dual Overhead Cam system is usually for use with engines that have more than 2 valves per cylinder -- generally 4, but some 3 value-per-cylinder endgines utilize a DOHC system.
		The name referes to the idea of having one cam shaft per X number of valves -- and more valves means more cam shafts, usually two vales per cylinder per cam.
		And lets not forget that adjusting the timing on a single cam system is much easier than the timing on a Dual cam engine.
	www.everything2.com /index.pl?node=DOHC (461 words)

	2005.5 Volkswagen Jetta Road Test
		Nuts and Bolts All new for the 2005.5 Jetta is a 20-valve, dual overhead cam, 2.5-liter, five-cylinder engine that puts out 150 horsepower at 5,000 rpm and 170 lb.-ft. of torque at 3,750 rpm.
		All new for the 2005.5 Jetta is a 20-valve, dual overhead cam, 2.5-liter, five-cylinder engine that puts out 150 horsepower at 5,000 rpm and 170 lb.-ft. of torque at 3,750 rpm.
		Offered in TDI models is a turbocharged, eight-valve, single overhead cam, 1.9-liter, four-cylinder diesel engine generating 100 horsepower at 4,000 rpm and 177 lb.-ft. of torque that peaks at 1,800 rpm.
	www.autosite.com /content/shared/articles/templates/index.cfm/article_page_order_int/3/article_id_int/680 (486 words)

	Saturn Side bar1 (Site not responding. Last check: 2007-09-06)
		Saturn currently manufactures three different types of engines—the base 1.9L 2-valve single overhead cam, the performance 1.9L 4-valve dual overhead cam and the new (in 1999) 2.2L dual overhead cam engine for the GM Powertrain World Engine Program.
		A single overhead cam activates rocker arms that open the valves on either side of the head.
		Dual overhead cam engines have one cam activate the intake valves and one activate the exhaust valves.
	www.castsolutions.com /archive/feature0100Side.html (269 words)

	Alfa Romeo 8C - Wikipedia, the free encyclopedia
		The short wheelbase version of this car won the Targa Florio race in Sicily, but it was the Italian Grand Prix victory at Monza that gave it its nickname, "Monza".
		The supercharged dual overhead cam straight-8 engine, also designed by Jano, was later enlarged to 2.6 L. In this guise, the 8C could accelerate to 60 mph (97 km/h) in less than 7 seconds and could eventually reach 135 mph (217 km/h).
		Alfa Romeo launched the stunning '8C Competizione' concept car at the 60th Frankfurt Motor Show in 2004 to an astonished audience.
	en.wikipedia.org /wiki/Alfa_Romeo_8C (286 words)

	Untitled Document
		AFX Dual Overhead Cam or Single Overhead Cam for 96 Neons.
		AFX Dual Overhead Cam or Single Overhead Cam for 97-99 Neons.
		AFX Dual Overhead Cam or Sinlge Overhead Cam for 00 Neons.
	www.thecarshopny.com /catalog_main.php3?category=3 (567 words)

	Classic Mercedes - Camshafts: SOHC, DOHC
		To begin with, dual overhead cam, twin cam, multi-cam, and DOHC engines are all the same thing.
		Having two overhead cams refers to having an individual camshaft to operate the intake valves and one to
		Overhead valve and single overhead cam engines in passenger cars are on the way out.
	users.skynet.be /mercedes-benz/history/SOHC.html (868 words)

	Camshaft Lobe Phasing - Tech Article - Chevy High Performance Magazine
		Unless you are working with a dual overhead cam engine, grinding a new cam is the only way to change the lobe separation angle.
		Stated another way, a cam with more advertised duration is guaranteed to have more overlap than a cam with less advertised duration even with the same lobe separation angle.
		It’s also important to remember that overlap is ground into the camshaft when it is machined and cannot be changed without grinding a new camshaft unless you have a dual overhead cam engine with separate intake and exhaust cams.
	www.chevyhiperformance.com /techarticles/95298_camshaft_lobe_phasing (1805 words)

	What's up at Nissan
		Its 24-valve 3.5-litter dual overhead cam engine produces 287 horsepower and 274 foot-pounds of torque.
		Based on the flagship Q45, the M45 offers a 340-horsepower, 32-valve, 4.5-liter dual overhead cam engine and an electronically controlled five-speed automatic transmission with manual shift mode.
		They include a 275-plus horsepower, 3.5-liter dual overhead cam V-6 producing 260 pounds of torque, enough to push you back into your seat.
	www.bankrate.com /brm/news/auto/car-guide/newmodel-nissan.asp (430 words)

	CTS-V General information
		It is an all-aluminum 60-degree dual overhead cam, four-valve-per-cylinder design developing 210 hp (156 kw) at 6500 rpm and 195 lb.-ft. (265 Nm) of torque at 3200 rpm.
		Consistent with the 60 degree V-6 design, the engine employs a wide range of advanced technologies, including fully variable valve timing of the intake and exhaust valves and a dual-stage variable intake manifold to deliver outstanding flexibility, fuel economy and emissions control.
		The 3.6L V-6 is an all-aluminum, 60-degree dual overhead cam, four-valves-per-cylinder design.
	www.cadillacfaq.com /gi/03-05cts.html (1336 words)

	Vintage Automobile Racing Engines
		Joe Gemsa cast these dual overhead cam heads for Model T Ford blocks but this is the only conversion he made for a Model A-B Ford block.
		This is one of two 181 cubic inch, dual overhead cam, 24 valve, six-cylinder engines built by Riley Brett, Cotton Henning, and W.W. Brown for C. Richards of Kansas City, Missouri.
		This dual overhead cam Model T Ford conversion engine was developed by Jack E. Gallivan and was available through his shop in Illinois from 1926 until 1930.
	winfield.50megs.com /Engines/Engines.htm (948 words)

	Universal Cam Adjuster
		The tool is needed to turn the cam sprockets to adjust the cam position.
		It can also be used to hold the cam sprocket in place when removing the cam bolt.
		It will work on all single and dual overhead cam sprockets with holes.
	store.autotoolexpress.com /uncamad.html (111 words)

	South Florida Jaguar Club - 40th anniversary of the Jaguar V12
		At the time, the V12 project called for a 5 liter, dual overhead cam engine but it would end up being shelved when Jaguar announced its withdrawal from factory racing in 1956.
		Still featuring dual overhead cam, which had become a Jaguar signature feature with the XK engine, and hemispherical heads, the engine produced just over 500 hp which was a little below the expectations of Jaguar engineers who were expecting close to 120 hp per liter or around 600 hp.
		Closely linked to the four cam V12, was the development of the race car which would receive the new engine, the XJ13, a mid engine, aluminum monocoque racer completed in 1966.
	www.southfloridajaguarclub.org /events/2001JCC-v.htm (1792 words)

	The Bikes Page
		Dual overhead cam 400cc parallel twin, redlined at a somewhat ill-sounding 10,000 RPM.
		In its day, the 550cc, overhead cam, inline four cylinder engine was a performance machine, but by today’s standards, it’s hardly a sportbike.
		Pairing the 550cc dual overhead cam inline four with a shaft drive and rubber motor mounts made the thing almost too smooth on the road.
	www.d.umn.edu /~john4783/thebikespage.htm (917 words)

	MotorWeek: Road Test
		But here output is 221 horsepower and 210 pound-feet of torque, thanks to intake variable cam timing and a free-flow exhaust.
		While rain limited our track testing, we did manage to get in a few sprints and found the Zephyr to be capable of a routine 0 to 60 of 7.0 seconds flat.
		Strong off the line, the variable cam timing gives this 3.0-liter a level of smoothness that earlier versions lacked.
	www.mpt.org /motorweek/reviews/rt2514a.shtml (676 words)

	Ford Racing Performance Parts [Cammer Engine]
		Not all too long ago, the term "dual overhead cam engine" was reserved for the high-tech racing community.
		For an inside look, we followed the build of a 4.6-liter dual overhead cam V8 down the same line as the 5.0 "Cammer" to see how it all works.
		A CNC machine is used to bore the cylinders on center, deck the block and chamfer the tops of the cylinder bores.
	www.fordracingparts.com /crateengine/cammerengine.asp (421 words)

	Delphi Variable Cam Phasers
		It enables the cam lobe (lift event) timing to crank shaft timing to be changed while the engine is operating, based on the parameters of the engine.
		The cam lobe angular position, or phase relationship, is controlled by the internal vane mechanism of the VCP.
		It can be used to shift the intake cam, the exhaust cam, or both on dual overhead cam engines.
	www.delphi.com /manufacturers/auto/powertrain/gas/valvetrain/vcp (699 words)

	STREET & STRIP
		Also referred to as double overhead cam or DOHC.
		A pickup with dual rear wheels, often used for towing.
		Intentionally using your brakes so your opponent will hit the finish line first, to try to force a break-out.
	www.summitracing.com /streetandstrip/dictionary/dictionary.asp?letter=d (888 words)

	Top Ten Sport Compact Performance Projects
		As overhead-cam engines are now the norm amongst compact and import cars, a special tuning aid has returned to popularity: degreeing the cam, which is adjusting the cam timing separate to overall engine timing.
		With so many more aftermarket camshafts available for compacts, and cams that are much easier to access, this method of tuning for driveability and a few more horses has become commonplace among import and compact fans.
		Adjustable cam sprockets are available for both single- and dual-overhead cam engines from a variety of manufacturers.
	www.valvoline.com /carcare/articleviewer.asp?pg=pht20001001ip&cccid=4&scccid=5 (3605 words)

	DOHC, SOHC, and Pushrod Engines
		With a camshaft sitting above the valve, all you have is some sort of lash adjuster (aka lifter) riding on the cam and the lifter rides on the valve.
		If all the valves are in line, like on an EEK or even a conventional Detroit V8, one cam will open and close the valves quite well.
		Putting the cam in the block and actuating the valves, through rockers, with pushrods works quite well, too.
	www.allpar.com /eek/cams.html (861 words)

	President's Day Automotive 2005
		There are also two engines available: a 2.7-liter dual overhead cam V-6 (standard in the GLS models) and a 3.5-liter dual overhead cam V-6.
		Tiburon's GS model is powered by Hyundai's 2.0-liter dual overhead four- cylinder engine that delivers 138 horsepower and 136 lbs.-ft. of torque.
		Both are powered by a 3.5-liter dual overhead cam V-6 engine, which mates to a 5-speed Shiftronic automatic transmission, delivering motive force to the front wheels.
	extras.berkshireeagle.com /NeBe/pres_auto/2005guide/default.asp?id=article14 (820 words)

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