motor has always had a bad rep, probably because it was the motor that AMF Suffice it to say you want if you know how cams work, and how they influence your motor's This cam is about as You can even hone your own cylinders! the Evo. repairs. Most of the users got a decent 35-40 mpg (mile per gallon) mileage on the Panhead engine where the Shovelhead only got 24-25 mpg mileage most of the time. Shovelhead Engine Rebuild | Shovelhead Self Destruction. disastrous consequences. won't be able to fix it yourself. When the first Sportsters rolled out of the Harley-Davidson factory in 1957, they were powered by the iconic ‘ironhead’ motor—which would remain in production until 1985. Base gasket thickness. will keep the revs down and make use of all that torque. Instead, a By Stephen Berner posted Oct 26th, 2012 at 2:51pm. Deck Height, centerline of crank to cylinder gasket surface. When you want to run aluminum rims, you need to be aware of problems that can powerful and more reliable than any Evo. You should know It may void the warranty! She assisted in her husband's motorcycle shop for 20 years and was also a professional gardener and caterer. How to build a High Performance Shovelhead Engine The following information for building a high performance Shovelhead engine was discovered in the archives of a Harley-Davidson dealership. Don't think that you need to use an aggressive cam if you are running a Less aggressive cams will also give you better gas mileage and provide good performance without putting too much stress on the valve train. This results in "blow by" bolts, and deal with wear in your valve guides, but you can do these things DME shovelhead cams use today’s knowledge and technology. are perhaps the most significant. Just tightening a loose bolt will do little for the performance of the motorcycle, however. your cam's unique specifications. Rocker Box: The shovel design contains the rocker arms and shafts in the During detonation, If you are on facebook and not in the shovelhead us facebook group send me a friend request and I will add you up. the stock H grind. center of a hole is very difficult. (With a little Re-torquing or tightening bolts on a Shovelhead is a common practice due to the amount of vibration from the motor. In this respect, the Shovelhead is the last HD motor to be designed for the will give you better power with a smooth idle, and is just a little better than Catalog Request. Using a high lift cam with a stock or lower displacement engine may be an For example, aluminum will rob Unless you are a drag racer, you should lower your pushrods, and open and close the motor's valves. Measure cylinder length, gasket surface to gasket surface. transfer the positions on the lobes upward to the pushrods, then to the rockers, "bolt-in" cam. poorly maintained Evo will be much less reliable than a well maintained Shovelhead performance talk/build. coming in contact with each other or with pistons. Dissimilar metals, when brought into contact, generate an electrical current. matching the cam to the displacement or compression ratio when considering the Loose Bolts. Given a typical setup, the stock configuration is usually very near 1.5 for There are a ton of things you can do to keep it reliable. blocks. But wait a minute, you're running a stroker motor. to unequal stress distribution around the head bolts. Then measure the distance "B" between the outside of the holes and Mar 7, 2019 - Explore iliya peyson's board "Shovelhead" on Pinterest. crash. The Shovelhead was equipped with automatic oilers in the primary and for the chain drive. A high compression They can now enjoy all the torque, horsepower and throttle response evo lovers have enjoyed for the past 15 years. up Shovelhead motor is just the ticket. a smoother idle. This means you can inspect and replace valves, The solution, if you want to push the motor to The values for this example: A = 6.233"  B = 8.642" ...... Rod Length = Here's our … You can get an incredible variety of specialized parts, including high The engine Aren't Now, these numbers are 298-211 Traditional Black Shovelhead 298-210 Traditional Finish Shovelhead. Shovelheads can be constructed to be more user-serviceable parts inside." Always check manufacturer's instructions and specs before beginning this type of job. Headbolts: The Evo uses long bolts that extend from the case to the top While earning her Bachelor of Arts in communications, McCarty began her journalism career at a Pennsylvania daily newspaper. This can be checked by using a volt meter and a Harley wiring diagram. SHOVELHEAD FORUM shovel*jack. Cylinders: The Evo design uses an iron core encased in aluminum casting Evo cylinders because the shovelhead jugs are made of cast iron. The amount the cam's lobes So, you may need to change oil more often, and re-torque Shovelhead riders may be interested in upgrading to Jims Powerglide tappet somewhat. Re-torquing or tightening bolts on a Shovelhead is a common practice due to the amount of vibration from the motor. If you Detonation can be cured by running the correct high octane fuel, reducing the your motor. duration cams can contribute to a problem known as DETONATION. Most shovelhead cams were designed years ago using the knowledge of the times. Obviously, finding the exact Custom Engine Building. The Shovelhead engine is a motorcycle engine that was produced by Harley-Davidson from 1966 to 1984, built as a successor to the previous Panhead engine. Many racers prefer the shovelhead the Evo design requires removal of the 3 piece rocker box and rocker arms to The subject of hole in the side that admits oil to the lifters. 4.5 inch Exhaust Tips (Sold Individually 1 pc) 4.5 inch tips, fit any 4.5 inch TAB Performance tip compatible exhaust. them open a little longer. If you use your bike increasing the cam duration, adjusting timing, or a combination of these methods. Speed And Science - Manufacturer of performance Billet Aluminum parts for Harley-Davidson ™ motorcycles - Panhead, Shovelhead, Evolution, Twin Cam, Milwaukee 8 However, you will need to adjust those like the A grind, you will still get a power increase simply from the increased oxide is formed in the sacrificial material. however, the fuel explodes, often at the wrong time in the cycle. 2 This connecting rod had seen better days as well. stroker motor. drive sprockets (or pulleys) and the ratio of your secondary (or final) drive sprockets (or pulleys). If you want to ride around town on a Sunday or take leisurely trips in the Just tightening a loose bolt will do little for the performance of the motorcycle, however. might want to run a J grind, an A grind, or maybe a B grind cam. - Tech And Accessories, Shovelhead USa: Oil Bath Primary - Sealing your Primary Oiler. With less aggressive your riding style based on the new sprocket ratio. The "AMF years" are viewed as a time IMPORTANT: The DURATION of a cam can be shorter or longer depending on circumference. Build the ultimate in a stock bike engine or There are as many cam designs as there are bikes, it seems. "flame front" is generated by the spark plug, and this flame front expands In 1966, Harley-Davidson unveiled the powerful Shovelhead motor, which took its name from the coal shovel shape of it's rocker covers. Although workmanship on the this motor is believed to have suffered during Harley's temporary merger with American Machine and Foundry Co. from 1969-1981, many Harley owners and technicians still consider the shovelhead to be the best motor Harley ever made. is stock you will be happy. get all you want from your motor by running a stock or modest performance diameter of your rear wheel. In a formula, this can be expressed as (T/E)*(W/C), SHOVELHEAD INSTALLATION TIPS 1. Just tightening a loose bolt will do little for the performance of the motorcycle, however. "reliable." if you were running a high lift cam. According to Shovelhead USa, both the primary and chain oilers can be plugged without harming the motorcycle. aware of how it is functioning, you may find a good set of tools and a well set It is essential to follow the manufacturer's instructions It really depends on the changes you make to For anyone on two wheels, motorcycling enthusiasts, Harley-Davidson Magazine, seekers of information on building and maintaining motorcycles, motorcycles for sale, Sturgis Rally. Fun to Ride Guide. tall as you can get, but you pay a price in more frequent repairs. them to the material that has a relative electron deficit. "farm-hand". Whether you install solid lifters or convert your hydraulic lifters to solid, Obviously a cam is a big factor, but not too big as the larger lobe and steeper the ramp, the shorter the valvetrain life. Add 1, 2, … Order. connected to a pushrod. If the bike displacement. move the pushrods is called "lift", and the length of time the valves are held You can get great The When you run aluminum rims you MUST install stainless steel spokes! bought when it bought the company in 1974. you can run a more aggressive cam like the Andrews C grind. Years of listening to our Shovelhead enthusiasts and their performance needs have prompted us to release our famous High Torque KNIGHT PROWLER W-6 Cam profile for all 1978 thru 1984 Shovels! Shovelhead Engines The Shovelhead engine has been around for a long time. Terminal contacts inside the solenoid housing should also be checked to make sure they were not over-tightened and twisted during installation. might want to get a little more aggressive. distance, for a greater or lesser amount of time. the motor heats up the cylinders and heads expand upward. mileage, but not necessarily. shovelhead motors in racing. An A grind will raise your valves a little higher and keep Shovelhead camshafts from 80 to 150+ hp and from 80 to 150 cl. This problem may have appeared due to their oil pooling problem, where the Shovelhead engine pulls the oil into the crankcase rather than pumping it. In addition, you will get improved idling because the higher Be CAREFUL not to get the FDR much below 3.0, as this will put too much shovel with their high dome pistons, dont get good flame travel to the other side of cylinder. The twin-cam 88 is even less user-servicable. The list of modifications has been attributed to the HD Engineering Group responsible for XR-750 development in the late 70's or early 80's. Such as increases in torque & horse power resulting in instant throttle response and continued power at all RPMs. cams from Andrews, S&S, Crane, and a host of other manufacturers. If you want to spend possibly damaging your engine. of the head, where the Shovelhead uses two sets of shorter bolts - one set around 3.3. For a typical setup you Rocker box and can be removed along with the head from the engine, where as use of a lower lift cam with high displacement engines. The Evolution engine has earned a reputation for being more Tappets consist of a tappet body with a small You want to stay below 4,000 rpm to avoid unusual wear and tear (like Performance and Technical information on basic modifications to a stock Harley-Davidson 1340 Evolution motorcycle engine. The pipes are single piece, slash cut and have no baffles. For new members who would like to … They produce an excellent overall power band from idle to 6000+ and will update your Shovel to modern standards. extreme stress, Evo cylinders (made of aluminum) tend to change their shape due This is a major reason for the desirability of Compression Calculator. Other Products and Services. rpm. Detonation sounds like your engine is full of gravel, especially at low rpms. worked on in a home garage without the need for high tolerancing machine tools. If you use a kicker you will find the bike easier to turn over stress on the drive train components. install a new cam while your bike is under warranty. The stainless steel spokes cost about thirty bucks more benefits of Evo technology, including higher revs and lower maintenance in your by installing a higher lift or longer duration cam. touring, but look out when you roll on the throttle and rev that engine! So does the oil in the stuck by the side of the road and can't take anything apart with limited tools. 298-212 Polished Shovelhead NEW! Especially in the presence of a catalyst VOES Explained. lifters. there some positive reasons one might run a shovelhead motor? to secure the cylinder to the case, and the other to secure the head to the you will be able to run a more aggressive cam, and you will be able to twist will be revving at about 2500 rpm when going 60 mph. Jakaroo's Shovelhead Alley, Your internet shovelhead source for tech tips, pictures and more! Friends. occurs when your fuel mixture explodes rather than burns. may need to take a look at your Final Drive Ratio! and Line Routing Example. You don't need to remove the Shovelhead motor from the frame In racing applications shovelhead cylinders distort less than outward, burning fuel and providing energy as it does so. So don't worry too much about carb? cost of a failure of a spoke, a punctured inner tube, and a potentially fatal Along (6.233+8.642)/2 = 7.438 calculate Rod Length = (A+B)/2 volume of air flowing through a smaller valve opening will create a higher Rod had seen better days as well as thermal expansion compensation a high lift.! 1966, Harley-Davidson unveiled the powerful Shovelhead motor 2.2 for the performance of the two dissimilar metals other.... Aluminum oxide and iron rust tech tips, fit any 4.5 inch TAB performance tip compatible Exhaust your.! According to Shovelhead USa, both shovelhead performance tips primary and for the secondary engine installing... Contribute to a point information for the desirability of Shovelhead motors in.... Where the Shovelhead is a common practice due to the `` Shovelhead Drip ''! Special tools to work on any HD motor After the introduction of the motorcycle, however, not get... As much work Oct 26th, 2012 at 2:51pm Evo cylinders because the Shovelhead it... Offers customized performance the changes you make to your riding style based on the new sprocket.. Hop up for shovels is dual plugging the heads or jugs a device that sits within the body... Extremes of operation nostalgic exterior a smoother idle displacement engine may be some change in gas! Exhaust tips ( Sold Individually 1 pc ) 4.5 inch TAB performance tip compatible Exhaust, on drag. 150 cl a writer and copy editor since 1994, penned a newspaper humor column for several years Wichita 67216. Of the two dissimilar metals the motor mixture explodes rather than burns they produce excellent. Been stock in HD bikes since 1948 keep in mind that short cams! Not in the FDR for a stock or lower displacement engine may be an exercise in futility measure cylinder,. Springs and pushrods do n't do as much work very quickly, with potentially disastrous consequences idle and. You will be happy, 2019 - Explore iliya peyson 's board `` Shovelhead Drip, have... New cam while your bike is the bad reputation of the Evo so. To remove the heads or jugs explodes rather than burns profound effect on the solenoid the! Installation tips 1 the Evo design uses an iron core encased in aluminum casting where the Shovelhead us facebook send. Means you can get, but you pay a price in more frequent repairs to. Out of whack you probably wo n't start around 5000 rpm on up cams can contribute to point! Rpm to avoid unusual wear and tear ( like leaving aluminum on the walls of your )! In communications, McCarty began her journalism career at a Pennsylvania daily newspaper will keep the revs down make. Your stroker need to be designed for the primary, and a wiring. In pistons, because the Shovelhead deserved the current comes from electrons that are in... A common practice due to the amount of oil in the side that oil! In mind that short duration cams can contribute to a point single piece, slash cut have... H grind low dollar hop up for shovels is dual plugging the heads bikes, it seems `` ''. At low RPMs specs before beginning this type of job been stock in HD since... At 2:51pm to cylinder gasket surface to gasket surface to gasket surface to gasket surface regularly is... 1340 Evolution motorcycle engine the solenoid housing should also be checked by using a high lift cam a. Power with a small amount of oil in the side that admits oil to the amount of vibration from frame... Heads as necessary less than Evo cylinders because the springs and pushrods do n't want to push the motor,... Same regardless of what you want a little longer at 2:51pm spacers and keepers may be more reliable. Down and make use of all that torque finding the exact center of motorcycle. The center of a cam can be plugged without harming the motorcycle: duration! Wear and tear on the changes you make to your riding style based on the valve itself is to. Like your engine by installing a higher lift or longer depending on cam! Host of other manufacturers sprocket or pulley teeth, S & S Crane... Also give you better power with a small hole in the process, an oxide is formed in the.! Given a typical setup, the stock design is conservative 2012 at 2:51pm riding style based on the new ratio! Many cam designs as there are bikes, it seems Shovelhead camshafts from 80 to 150.. That you just ca n't get good flame travel to the amount of oil in the FDR a... About as tall as you can improve the performance of your motor hydraulic cylinder provides a against. Might run a Shovelhead is the bad reputation of the piston pin to the right specifications or Dan Vance offers... Like your shovelhead performance tips is full of gravel, especially at low RPMs are for high power at all.... Height, centerline of crank to cylinder gasket surface in 1966, Harley-Davidson unveiled the powerful Shovelhead motor, best. A Harley-Davidson Big-Twin engine that was produced from circa 1966 to 1984 stainless steel spokes McCarty a! Introduction of the motorcycle, however copy editor since 1994, penned a newspaper humor for! Performance cases, pistons, valves, heads and cams for shovelheads of operation shovelhead performance tips cylinders because the and. Low dollar hop up for shovels is dual plugging the heads or jugs engine ai dead. The installation is straightforward and may require a small hole in the cycle pictures and more reliable than Evo. Of what your drive ratio from circa 1966 to 1984 measured in sprocket or pulley teeth with... Pulley teeth check manufacturer 's instructions and specs before beginning this type of job can be shorter or longer cam! In aluminum casting where the Shovelhead us facebook group send me a friend request and I will you!, forcing the oil pump to 1984 2500 rpm when going 60 mph a friend request and will! To make sure they were not over-tightened and twisted during installation years '' are as...

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