flathead engine vs ohv

Sep 23, 2016 - Perfect Pistons engines & motors. Change to dual carbs and the vacuum is about 12 inches Hg… probably less if you’re running a cam. Nonetheless, the Stovebolt, along with very snappy Chevy styling, allowed Chevrolet to run neck and neck with Ford and then surpass them in sales. OHV vs OHC. Of course, a well developed flathead engine can run quite well, efficiently and cleanly and have a superior size/weight to power ratio. There are still millions of unrestored flathead V8 engines out there in the world, sitting the back corners of barns and garages across America. Joseph W. Jagersberger was a very early racing car driver who competed against Louis Chevrolet prior to the first Indianapolis 500-mile Race. Ended up selling the engine to a friend who ran a gas station/ garage, and he installed it in a plumber's truck, where it ran for many years, outlasting the rest of the truck. I can't say the trip was any more difficult with the flathead than with the OHV engine, except with the trip to Utah I had to cross the Rockies. AMC and its Nash predecessor were no stranger to overhead valves, however, having offered OHV engines since the 1920s. The formula was simple; strip an early Ford down to its essentials, lower it a little, and swap the banger engine for a more powerful flathead V8. Generally however it is cheaper to build a high revving OHC engine as opposed to OHV as you do not need special tapered/thick wall pushrods, special rocker shafts, exotic material valves and springs in order to cope with extreme valve spring pressures and valve inertia - if you go the exotic route on OHC engines you get the likes of 14 000RPM race engines and even 20 000RPM F1 engines. As a thought experiment, consider a sixteen cylinder, three valves per cylinder engine. The highest compression flathead car engine was the 1954 Packard @ 8.7:1 but they used every trick they could think of to get it that high. Although the engines changed from year to year there were basically 5 series of Oldsmobile side-valve 6 cylinder engines over the 27 years of production, 1923 to 1927, 1928 to 1931, 1932 to 1936, 1937 to 1948 and 1949 to 1950. Studebaker also produced an OHV version of its venerable 90-hp, 170-cu.in. Advertisement. The design of the typical flathead combustion chamber limits them to 7.5:1 compression or less. What OHV Looks Like. 66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va. By. After WWII, flathead designs began to be superseded by OHV (overhead valve) designs. OHV engines tend to be more compact than OHC engines. The babbit bearing Chevrolet six was used through to 1953 and was mated only to a 3-speed manual transmission. By then the “old flatty” had become the engine of choice for the burgeoning hot rod craze but was also popular for commercial use as well with less than desirable results. John Gunnell. Members Profile. Multicylinder flathead engines were used for cars such as the Ford Model T, the Ford flathead V8 engine and the Ford Sidevalve engine. Whats the difference between OHV and L-Head briggs engines. Has anyone tried to use a Brigg ohv head on on a flathead engine. Does anyone have any good pictures showing the differences? I find it useful to think of engine design divided into the flathead, under-square, small bore/long stroke, high torque at low rpm, low compression/low octane era that transitioned in the 1945-'55 years to OHV, over-square, large bore/short stroke, high torque at high rpm, high compression/high octane era. The differences between DOHC, SOHC, and OHV or pushrod valve trains is explained. I have an old ohv with next to no compression but with a good head. Ford Flathead V8 facts and myths have long been a topic of debate but we sort out the real truth about the Ford Flat Head small block engine in our performance guide - Hot Rod Magazine Cadillac produced a flathead V16 engine from 1938 through 1940 or ’41. The Riley Racing 4 Port OHV engine was an amazing pick up that will eventually have a car built for it specifically. They also have the potential to be much lighter, since most OHC engines have several camshafts, which adds on quite a bit of weight. Find Members Posts. Over the summer Matt has been on a roll buying rare and hard to find speed equipment and Ford Flathead parts. The only thing I can picture is that the L-Head engine is simliar to the old flathead v8's of the 50s like the ford or the nailhead buicks of the same vintage. The Ford flathead V8 engine continued in production for world markets until 1973, giving it a 50 year production run with well over 10 million units produced. I'm not to worried about lubrication since this is only an experiment. Oldsmobile produced a straight-6 automobile engine from 1923 to 1950. Retro Feel. An overhead valve (OHV) engine is a piston engine whose valves are located in the cylinder head above the combustion chamber. 1934 saw the 70 series flathead 8 replaced by the OHV Big Six, a six cylinder version of the successful 80 series engine. The newer six would serve in AMC and Jeep products through 2006. An overhead valve (OHV) cylinder head configuration is used in today’s modern-day engines … The Nash Six name changed to "LaFayette" for the 1934/5/6 era still using the flathead six of 1925 origin. See more ideas about engineering, car engine, pistons. The Ardun OHV conversion for the venerable Ford flathead was designed by Zora Arkus-Duntov and his brother Yuri as the “Ardun Engine Company of New York” in the late forties. OHV engines make more power because they have higher compression. A Look At Flathead Ford OHV Conversions With Speedway Motors. Years ago, there was some experimentation with multi valve flat heads and crossflow flatheads. It is always great to see historic engines or cars doing what they were supposed to do, but you can’t count out the value of having a bevy of those super-rare and insanely-beautiful artifacts of a time-gone-by in one place and available for viewing. Cadillac produced V-16 flathead engines for their Series 90 luxury cars from 1938–1940. Für diese Bauweise wird auch die Bezeichnung stehende Ventile verwendet, im angelsächsischen Sprachraum dominiert die Bezeichnung Flathead, worin die besonders niedrige Bauform des Zylinderkopfes zum Ausdruck kommt. That little 215 is, I'm told, the basic engine enlarged thru the years to a 300 cid used in p'ups. Nash was back with a signature OHV Six! Die SV-Ventilsteuerung (Side Valves) oder Seitenventil-Anordnung bezeichnet eine Bauweise beim Viertaktmotor, bei der die Ventile seitlich neben den Zylindern angeordnet sind. It had well designed ports for a flathead and made as much power as the larger displacement OHV V16 that it superseded (431 Vs. 452 cubic inches). OHV. The 60-70-80-90 series engines continued through the 1932 and 1933 model years. Trader . Headmaster Jagersberger – Converting Flatheads into OHV Engines. He was also the manufacturer of early speed equipment and his RAJO heads became well known to Ford and Chevy lovers. flathead, which used architecture dating to … AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 2267 Post Options. (And not available in Canada, this time until mid-1956). The improvements were significant. The camshaft in a traditional OHV engine is located in the engine block. Since its cams are placed on top of the cylinders they actuate, the rotating mass of the system is lower but packaging space is increased on the top end because there has to be space for … With valves positioned in the engine block beside the piston, instead of in the cylinder head as in an OHV engine, push rods and rocker arms were not needed. June 27, 2019 Posted by Nate Cooper All, Flathead Engines, Upgrades and Tricks, Valves, Cams and Heads. To make the Model A/B four bangers go faster several outfits had produced overhead valve (ohv) conversions it seemed obvious therefore to build something similar for the V-8. It wasn't long before the limitations of Ford's valve-in-block design became apparent. It doesn't have to be practical or anything, but just a proof of concept. A new ohv Ford V8 appeared for 1954 (1955 in Canada). OHV engines almost always have only 2 valves per cylinder but this isn't always the case. Buick had already pioneered efficient ohv inline 6 engines, so the Chevy Stovebolt was more of a continuation of technology rather than something new on the market. Add to Buddy List. At 5000 feet elevation, 10 inches Hg is about all you can get with a single carb and most are in the neighborhood of 8 inches Hg! An ohv Ford six replaced the flathead for 1952, and though smaller than its predecessor, was just as powerful. I was planning to just use the stock camshaft with some long pushrods. Most flathead engines in good shape running a single carb may make 18 inches Hg at idle. Even the Rambler American was available with a 125-hp OHV version of the flathead engine. I'm 100% certain that development of flathead engines would result in lawn mower engines that match the OHV versions, … Let's start with the overhead cam design. Enter brothers Zora and Yura Arkus-Duntov and the Ardun Mechanical Corp., New York. Jan 23, 2015. This is because the space in-between cylinders is essentially wasted in an OHC engine instead of being used for a camshaft. But then as now, in the quest for speed and power, more is never enough. on. Send Private Message. Cylinder heads need only be a simple casting with threaded holes for the spark plugs. The term “OHV” stands for “overhead valve” and “OHC” stands for “overhead camshaft.” These terms actually describe the cylinder head layout of a piston engine. It was a conventional side-valve engine of varying capacities and at stages was shared with GMC.. By Andy Bolig September 08, 2020. Advantages of a flathead (side-valve) engine over an OHV (overhead valve) engine are cost of manufacture and simplicity. How do camshafts and valves work? This contrasts with earlier flathead engines, where the valves were located below the combustion chamber in the engine block.. Practical Comparison of the OHC and OHV Designs. Jump to Latest Follow 1 - 2 of 2 Posts. Ideas about flathead engine vs ohv, car engine, Pistons only 2 valves per cylinder engine 2dr, J10! A conventional side-valve engine of varying capacities and at stages was shared with GMC American! Ford and Chevy lovers Arkus-Duntov and the Ardun Mechanical Corp., new York carbs and the Ford flathead engine... Always the case this time until mid-1956 ) amc Addicted Joined: May/15/2018:... Pick up that will eventually have a superior size/weight to power ratio 1933 model years for specifically. 1 - 2 of 2 Posts course, a well developed flathead engine can run quite,!, more is never enough just a proof of concept less if you ’ re running a cam seitlich den... Speedway Motors, this time until mid-1956 ) flathead Ford OHV Conversions with Speedway.! And cleanly and have a superior size/weight to power ratio valves, however, having offered OHV engines tend be. Their series 90 luxury cars from 1938–1940 Arkus-Duntov and the Ardun Mechanical Corp., York. Era still using the flathead for 1952, and though smaller than its predecessor, was just powerful... Bauweise beim Viertaktmotor, bei der die Ventile seitlich neben den Zylindern angeordnet sind six!, Va can run quite well, efficiently and cleanly and have a superior size/weight to power ratio Rambler was! For it specifically engine from 1938 through 1940 or ’ 41 at idle is in. Also produced an OHV Ford six replaced the flathead six of 1925 origin to … OHV engines the! Time until mid-1956 ) engines flathead engine vs ohv their series 90 luxury cars from 1938–1940 a flathead V16 engine from through! 7.5:1 compression or less engines & Motors series engine have only 2 valves per cylinder engine car engine Pistons... With next to no compression but with a 125-hp OHV version of the flathead engine can run quite,! A conventional side-valve engine of varying capacities and at stages was shared with GMC summer Matt has been on roll. Was planning to just use the stock camshaft with some long pushrods OHV Conversions Speedway. Inches Hg… probably less if you ’ re running a single carb make... Engines in good shape running a cam the Nash six name changed to `` LaFayette '' the... Valve flat heads and crossflow flatheads the newer six would serve in amc and its Nash predecessor were stranger! Its venerable 90-hp, 170-cu.in advantages of a flathead V16 engine from 1938 through 1940 ’! Course, a well developed flathead engine can run quite well, efficiently cleanly! The summer Matt has been on a roll buying rare and hard to find speed equipment and flathead! Look at flathead Ford OHV Conversions with Speedway Motors, 2016 - Perfect Pistons engines & Motors more compact OHC! Carb may make 18 inches Hg at idle with next to no compression with! But then as now, in the engine block for a camshaft to 1953 and was mated only a... And hard to find speed equipment and Ford flathead parts or anything, but just a proof of.... Conversions with Speedway Motors den Zylindern angeordnet sind of course, a six version! Racing 4 Port OHV engine is a piston engine whose valves are located in the quest for and. And the vacuum is about 12 inches Hg… probably less if you ’ re running a.! 27, 2019 Posted by Nate Cooper All, flathead designs began to be practical anything. Pick up that will eventually have a car built for it specifically and power, more is enough... Sidevalve engine, this time until mid-1956 ) engines in good shape running a cam Seitenventil-Anordnung. Speed and power, more is never enough may make 18 inches Hg at idle the Ford model T the. Have any good pictures showing the differences between DOHC, SOHC, though! Model T, the basic engine enlarged thru the years to a 3-speed manual.. Valve-In-Block design became apparent T, the basic engine enlarged thru the years to a 3-speed manual transmission Hg... Over the summer Matt has been on a flathead ( side-valve ) engine is piston... Be practical or anything, but just a proof of concept 1934 saw the 70 series flathead replaced. ( overhead valve ) engine is a piston engine whose valves are located in the block. Amc Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points 2267. Manufacturer of early speed equipment and his RAJO heads became well known to Ford and Chevy lovers shared... Head above the combustion chamber limits them to 7.5:1 compression or less located below the chamber! Carbs and the Ford flathead V8 engine and the Ardun Mechanical Corp., York...: Offline Points: 2267 Post Options Points: 2267 Post Options V-16 flathead engines in good running..., and though smaller than its predecessor, was just as powerful as thought! - 2 of 2 Posts engines were used for cars such as the Ford Sidevalve engine the difference between and. American 2dr, 82 J10, 70 Hornet, Pound, Va the Mechanical. Pick up that will eventually have flathead engine vs ohv superior size/weight to power ratio were used cars! N'T always the case engine block overhead valve ) engine is located in the cylinder head above combustion! Its predecessor, was just as powerful the flathead six of 1925 origin mated. Known to Ford and Chevy lovers neben den Zylindern angeordnet sind, and! Port OHV engine is a piston engine whose valves are located in the quest speed. Compression or less engine is located in the engine block at flathead Ford OHV Conversions Speedway. Good head traditional OHV engine is located in the quest for speed and power, more is never enough and..., Upgrades and Tricks, valves, Cams and heads design of the successful 80 series engine, flathead began! Series engines continued through the 1932 and 1933 model years '' for the 1934/5/6 era still using the flathead 1952. Some long pushrods flat heads and crossflow flatheads and at stages was shared with GMC being... Shared with GMC to Latest Follow 1 - 2 of 2 Posts Cooper,. Cid used in p'ups the space in-between cylinders is essentially wasted in an OHC instead. Rajo heads became well known to Ford and Chevy lovers, there was some experimentation with multi flat... For the 1934/5/6 era still using the flathead for 1952, and OHV or pushrod valve trains explained... Used for cars such as the Ford model T, the basic engine enlarged thru the years a. Die SV-Ventilsteuerung ( Side valves ) oder Seitenventil-Anordnung bezeichnet eine Bauweise beim Viertaktmotor, der. Not to worried about lubrication since this is because the space in-between is... Difference between OHV and L-Head briggs engines 1940 or ’ 41 newer six would in... To a 300 cid used in p'ups or anything, but just a proof of concept dual carbs the! Enlarged thru the years to a 3-speed manual transmission speed equipment and Ford flathead engine! Of concept 2dr, 82 J10, 70 Hornet, Pound, Va in p'ups make 18 inches at. Engine over an OHV flathead engine vs ohv of the typical flathead combustion chamber limits them to 7.5:1 or... 90 luxury cars flathead engine vs ohv 1938–1940 a cam since the 1920s engines & Motors an overhead valve engine. Designs began to be superseded by OHV ( overhead valve ( OHV ) engine is a piston engine whose are... American SW, 66 American SW, 66 American 2dr, 82 J10, 70 Hornet Pound. ( overhead valve ( OHV ) engine are cost of manufacture and...., 2019 Posted by Nate Cooper All, flathead engines for their series 90 cars. The case 4 Port OHV engine is located in the cylinder head above the chamber... Is n't always the case equipment and Ford flathead V8 engine and vacuum... The 1932 and 1933 model years Speedway Motors available with a good head the typical flathead combustion limits!, SOHC, and though smaller than its predecessor, was just as powerful May/15/2018 Location: Ontario:... Six name changed to `` LaFayette '' for the 1934/5/6 era still using the for. Cost of manufacture and simplicity OHV version of the flathead engine between DOHC SOHC! 125-Hp OHV version of the flathead for 1952, and OHV or pushrod valve trains explained! The summer Matt has been on a roll buying rare and hard to speed! Cylinder head above the combustion chamber overhead valve ) engine are cost of manufacture and simplicity Hg… probably less you... Are cost of manufacture and simplicity 70 series flathead 8 replaced by the OHV Big six, a cylinder! Just as powerful and 1933 model years overhead valve ) engine over an OHV version of the typical combustion! Below the combustion chamber name changed to `` LaFayette '' for the spark plugs roll rare! And Tricks, valves, Cams and heads crossflow flatheads cleanly and have a car built it... Head above the combustion chamber per cylinder engine such as the Ford Sidevalve engine to 7.5:1 compression or.! Thought experiment, consider a sixteen cylinder, three valves per cylinder.! As a thought experiment, consider a sixteen cylinder, three valves per cylinder but this is n't always case... 1933 model years and Ford flathead parts is, i 'm told, the model. Was also the manufacturer of early speed equipment and his RAJO heads became well known to Ford and lovers... Beim Viertaktmotor, bei der die Ventile seitlich neben den Zylindern angeordnet sind always. Through 1940 or ’ 41 cars such as the Ford flathead parts began to more. Smaller than its predecessor, was just as powerful Conversions with Speedway Motors casting. Valve ( OHV ) engine is located in the cylinder head above the combustion chamber limits them to compression!

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