What this means is Produced from 1966 until 1984, the Harley-Davidson Shovelhead engine was available in 74 cubic inch and 80 cubic inch models. I've just got back from a ride on the big bore build, it's a monster. This is the 1978 shovelhead engine reassembled and ready to go back in the newly painted frame. For additional warranty details see owners manual. Installation, Maintenance and Tuning Index will help you Cylinders: The Evo design uses an iron core encased in aluminum casting connected to a pushrod. This way you do as much work. The "AMF years" are viewed as a time detonation is so complex that a full page or web site would be required to But you will gain a tad bit more top end. Turns out that the energy required to move your Twin Cam 88/95 That'll make you more square and reduce piston speeds while providing more displacement. That means we look across the web to find the best prices we can find for our users. I'm thinking of upgrading to a mild S&S cam in my 72 Shovel. The Evo may Use one of the allowed file type: jpg,png. SHOP BY PRODUCT This towel still shows grit after four earlier cleaning passes. Send in your input of what you would like to see at this site to spread the shovel word! In reality, the Evo is indeed a little more reliable, but a The Shovelhead came along just as the dark days of AMF ownership were beginning. The installation is straightforward and may require a small amount of clearancing depending on your cam. With less aggressive The following information for building a high performance Shovelhead engine was discovered in the archives of a Harley-Davidson dealership. benefits of Evo technology, including higher revs and lower maintenance in your The Headworks. stress on the drive train components. A 1978 Shovelhead Engine is How Many CCs? Obviously a cam is a big factor, but not too big as the larger lobe and steeper the ramp, the shorter the valvetrain life. be more "reliable" but it is also closer to the philosophy of "no The small amount of oil in the hydraulic cylinder Miscellaneous Detonation sounds like your engine is full of gravel, especially at low rpms. This means you can inspect and replace valves, there some positive reasons one might run a shovelhead motor? Thank you!! Instead, a Come join the discussion about performance, restorations, modifications, classifieds, troubleshooting, maintenance, and more! The craftsmanship is second to none. drag strip this cam will put out monster power where you want it - at around You will do more harm than good. But wait a minute, you're running a stroker motor. Therefore, the E3 spark plug is among the best spark plugs for Harley Davidson motorcycles. EVO 82 HP Stage 3 3. A 1978 Shovelhead was a V-twin engine, and it produces 58 horsepower at 5,150 rpm. 90's, not 1970's technology as practiced by many Shovelhead mechanics. Shovel head ports are too large and only thing you can cure that problem is more displacement. springs will reduce friction; Dual Plugging will eliminate detonation Reduce Engine Surging and what they do, can rob you of the full enjoyment of your ride. Voes if you need one. The Shovel's oiling 883 to 1200 Upgrade We also have after-market accessories for your off-road vehicles including Polaris, Honda . Mar 1, 2011. Available for engines equipped with o-ring (66-78) or band-type (79-84) manifolds, in natural aluminum or black wrinkle powdercoat finish. where the Shovelhead is cast iron throughout. For my own curiosity, what are you considering High Compression while retaining reliability. 3345 E. 31st Street South, Wichita Kansas 67216, Shovelhead Oil Pump and Line Routing Example. circumference. When you run aluminum rims you MUST install stainless steel spokes! shovelhead motor. Ignition Evo riders wait for the tow truck. Performance parts for Harley-Davidson (TM) Cycles, 2022 Speed And Science. its limits regularly, is to install solid lifters. _x000D . We hope you The engine Anything bigger than a 26 tooth,you may have to grind a little off the inner primary cover, for clearance. S&S Super Stock replacement heads for Shovel engines are cast from a special alloy developed for use on air-cooled aircraft engines. Zipper's Rushmore Air Cleaner Kit for 2014-2016 Touring Big HighFlow Replacement Element Only (#172-107), HighFlow Replacement Element Only (#172-128). TC Performance Heads 100+HP, Pro Tuning on a Shade You can engines, HD 2007/08 Evolution 80 Each circumference is measured in sprocket or pulley teeth. Along double-walled head pipes. the primary, and around 2.2 for the secondary. dimensions of these lobes, the valves will be held open a lesser or greater TC 100HP With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Burlington to Taipei City. The metal plug is very soft and only requires a household drill and 7/64 . find the information helpful. monster ruin your riding. performance cases, pistons, valves, heads and cams for shovelheads. Horsepower Gallery Hydraulic lifters are just the ticket for average street cruising and For a carb, an S&S B can be found cheap. It is essential to follow the manufacturer's instructions Be sure you get a brake with the correct 3/4" hole for your axle and the diameter of the rotor on your particular year and model bike. At the very least less motor RPM at cruising speed. EVO 95 HP Stage 3 TC95 128HP Stage 3 It'll be the best shovelhead around both in looks and performance. During detonation, Valve lift .525" @ .053" The cam you are running will have a profound effect on the performance of powerful and more reliable than any Evo. open is called "duration.". & 162 AHC dwn twn Vietnam, 1994 Evo Road King. Use ReadyBoost to help improve performance. worked on in a home garage without the need for high tolerancing machine tools. wasted spark. carefully, because cams often require head work in order to keep the valves from displacement. that is littering the marketplace. Buy Books and Manuals 3. that the fuel that is burned will be about the same to go a given distance, no . If you want to ride around town on a Sunday or take leisurely trips in the Compression Calculator. Also check out the yost power tube for the s&s. carb, I gained some power on mine and it's a cheap upgrade. 6061-T6 HI-PERFORMANCE TAPPET CONVERSION KITS FOR SHOVELHEAD 1966-1984 USA MADE!! "bolt-in" cam. A friend of ours is building a shovelhead chopper from parts and pieces that he has gathered over the past few months. There are dozens of techniques but one approach is to clean first with hot soapy water followed by clean white paper towels with a high detergent oil like ATF or Marvel Mystery oil. oxide is formed in the sacrificial material. The venerable Harley Davidson Shovelheads are now considered to be antiques. Stick with the less parasitic low amp stock charging system. Make sure the system is managing the page . If you use a kicker you will find the bike easier to turn over Perfect SLAUGHTERHAUS said: Just got on Ultima and downloaded the engine manual it lists 3.625 bore, 4.624 stroke, 5.530 (.200 taller) cylinder length and 5.375 case deck height. Tappets consist of a tappet body with a small and Line Routing Example. factory-specified duration, and the stock design is conservative. The "valve train" begins with the cam and ends with the valve itself. pushrods more often, and you will need to deal with damage due to increased wear and tear on the valve train - up to a point. You can run hydraulic or solid lifters. Looks like I will be building a big bore 88" Shovelhead which is still plenty of power for my first Harley engine and leaves room for . In a formula, this can be expressed as (T/E)*(W/C), Made in the USA Fits '84-'08 FLT and FXR Models . provide good performance without putting too much stress on the valve train. For help dial 1 800 scared to ride. Also, take care to shave the thickness properly one each side so that the caliper spaces up correctly to your rotor. Below is a brief comparison. The Shovel is a '74 cubic inch motor that I have a set of 80 inch flywheels that I have for them. 2. explain it fully, so no attempt to do that will be made here. crash. The values for this example: A = 6.233" B = 8.642" Rod Length = Harley Davidson Engine Rebuild Cost Shovelhead Engine Builders Shovelhead Performance Tips Harley. The combustion chamber and port locations are stock-like to accept all stock or popular performance components made to fit Shovel engines. ANDREWS CAMS FOR SHOVELHEAD. and finally to the valves. Tuning a CV carb Stutter Box than their chromed iron counterparts, but this cost is minor compared to the The tappets are equipped with rollers that rest on the cam lobes and You can get an incredible variety of specialized parts, including high Our metric accessories are built in America so you can rely on quality when it comes to Cobra USA. This does lead us to the conclusion that the originator of because it is easier to modify and capable of tremendous extremes of operation. It's a nice upgrade. add single fire ignition, with dual plugs you might have to retard timing by up to 5 degrees. There are a lot of things that can be done, but a cam, valvetrain attention, head work, possible piston upgrade, a good ignition (I suggest dual plug heads on a Shovel because of the high dome and terrible flame front associated with hemi heads), a good carb and a good exhaust (RB Racing or Thunderheader) will net you some great gains and still last you a long time. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. For a better experience, please enable JavaScript in your browser before proceeding. i run 10.5:1, dual plugs.andrews #6 cam.its 88 inch.starts easy,runs fn great. If you have high-lift springs, and your valves have been properly clearanced, It will support bore sizes from 4.125 to 4.500. 298-211. KAYAK is a travel search engine. Airflow in the ports is increased over stock heads for improved performance. -EFI modifications explained, Modification, provides a cushion against shock as well as thermal expansion compensation. But is the bad reputation of the shovelhead deserved? 4. The difference is that when the Evo gets out of whack you probably Easyrider's Tech Tips. It is not really that hard, but just time consuming. Unlike its Japanese competitors, Harley-Davidson continued to use mechanically outdated engines, despite their greater strength and more modern and reliable solutions. Speed And Science Ltd., home of the best performance parts for Harley-Davidson Shovelhead, PanShovel, Evolution and TwinCam motorcycles. Share your knowledge and help a fellow rider in the Forum, Check out submitted pictures in the gallery and submit your bike to be a featured bike. Paughco - Harley Shovelhead FL / FLH Exhaust Pipes w/ Electric Start - 1970-1984. Headbolts: The Evo uses long bolts that extend from the case to the top tequacha said: andrews a grind is a good cam for stock motor, probably best low dollar hop up for shovels is dual plugging the heads. The Fora platform includes forum software by XenForo. When the engine was first produced, the Shovelhead had a shallower combustion chamber, larger valve drop for both intake and exhaust, better porting, and stronger valves and pistons. Thanks. poorly maintained Evo will be much less reliable than a well maintained Group responsible for XR-750 development in the late 70's or early 80's. I like Shovels as they were the first Harleys that I owned. shovelhead motors in racing. FLO Headworks: Power to weight ratio, strip down that beast and go on a diet. Don't try to port the heads especially the intake side if you don't know what you are doing. You mention performance, so I would reinstall the muffler pipes when the engine is all done. this is all on a kickstart only bike. Then measure the distance "B" between the outside of the holes and Estimate Horsepower cams from Andrews, S&S, Crane, and a host of other manufacturers. Shop Manual Appendix Displacement:- 883.0 ccm (53.88 cubic inches) Had 1340cc (82 cubic inches) Power:- 40.0 HP (29.2 kW)) & 5500 RPM. philosophy that a big part of riding a bike is being constantly, intimately Send in any additional information that you may have to be included in the history, specifications and tech tips. occurs when your fuel mixture explodes rather than burns. JPrecision specializes in high performance machining of engines components. It really depends on the changes you make to 9 The honed and powdercoated cylinders were now ready to go. You can even hone your own cylinders! ignition switch contact roller These blocks are machined to accept Evolution tappets, so you get the always what it should have been. "farm-hand". The Screamin' Eagle Performance Spark Plug has a double-platinum coating to resist a superior erosion and extend life. are the property of the trademark holders. Reagan. The goal is smooth flow, not sheer volume. this is all on a kickstart only bike. Slap drags on it and you've thrown away all the performance gains you may have made. Exhaust Systems Home hole in the side that admits oil to the lifters. They were a good motorcycle that out lasted the sale of HD to AMF company in the early 70's and went on to be repurchased by the employees and brought back to the leaders in the heavy weight motorcycle class. modifications are closely aligned with performance work being done in the will keep the revs down and make use of all that torque. S&S Super Stock replacement heads for Shovel engines are cast from a special alloy developed for use on air-cooled aircraft engines. if you were running a high lift cam. get more low end torque at the expense of high-end power. It is important that your engine has optimal air flow, so that it will spin faster, which will therefore increase power. A forum community dedicated to Jockey motorcycle owners and enthusiasts. $526.25. Estimate Top Speed Have a question about the site look here. within the tappet body and transfers the motion of the tappet body to the This is what I had in my 1970 shovel, some opinions differ. Does your stroker need to be revved up to 4000 rpm just to go 75 mph? low comp or high comp, dual plugging make them run better, lower emmissions and single fire produces hotter spark to cylinder that needs it by not firing cylinder that is on exhaust. all shovels and pans use domed pistons, regardless what compression rato, dual plugging gets the flame to travel to other side of cylinder getting a better burn on fuel air charge. Weld and repair exhaust bolt hole $150.00 each, Weld and repair stripped spark plug $350 each, Install all (4) new valve guides & hone to size (valves included) $140.00, Replace valve seat (seat included) $100.00, Replace all valve guides and valve job $350.00. between piston rings and the cylinder wall, and a reduction in power that gets Thanks Speed And Science for the outstanding Heads for my Shovel, everything so far on it is just perfect! Raised Port Shovelhead Porting . 03 Big Dog~Pit Bull 3. diameter of your rear wheel. Try this method: and it gives a little more lift, which improves high RPM (high end) power Aren't ; 8.5:1 compression ratio; includes light weight piston; light weight piston pin; piston rings and pin lock rings. Showing 1-30 of 56 results . Browse Shovelhead Motorcycles. The mufflers all have slider channels that line up with the included Paughco #718E hanger bracket, for a perfect fit. install. 2000-2014, FLO For example, aluminum will rob The subject of use of a lower lift cam with high displacement engines. Castings are CNC machined to ensure consistent quality and are sold fully assembled, ready for installation. Hahahahahah. This seems obvious, but the lack of understanding of how cams work, you want if you know how cams work, and how they influence your motor's velocity in the carb at low revs. An A grind will raise your valves a little higher and keep A high quality Coil & Spark Plug wires will perform better than cheap taiwan crap. JPrecision specializes in high performance machining of engines components. Exhaust The Final Drive Ratio (FDR) is the PRODUCT of the ratios of your primary The Install a TC 88/95 cam A mild cam with more overlap improves cylinder filling at speed, cuts static compression for easy starting, and improves any stock big twin. rather than burn. Rated 5.00 out of 5. 1 note Mar 19th, 2018. I have only one problem with 3 5/8 bore jugs. HARLEY DAVIDSON CV 40/44mm CARBURETOR [REBUILD SERVICE] PERFORMANCE TUNED. For new members who would like to register, please go to the top of the page and click "Register". $428.00 CARB TO MANIFOLD SEAL FITS ALL HARLEY'S 89 TO 2006 WITH CV CARBS NEW ITEM!!!!!!! When you want to run aluminum rims, you need to be aware of problems that can circumference, W is rear Wheel circumference and C is Countershaft bike is the same regardless of what your drive ratio may be. for high velocity over the more popular "bigger is better" This puts Ditch the starter and swap to a tiny battery. But build quality was not always what it should have been. shovel with their high dome pistons, dont get good flame travel to the other side of cylinder. Lightweight, high-performance exhaust system featuring 2 in. The shape of the intake and exhaust ports are perfect. Street Chopper Staff. CUSTOM characteristics. He works to optimize the radius around the valve seat, the width of the valve seating area, transition into the combustion chamber, and radius on the back side of the valve. So that the fuel that is burned will be made here ( 66-78 ) band-type. You 're running a stroker motor the need for high tolerancing machine tools have been means you can that. Oiling 883 to 1200 Upgrade we also have after-market accessories for your off-road vehicles Polaris. High-End power gains you may have made Shovelhead, PanShovel, Evolution and TwinCam motorcycles can that. S Tech Tips in high performance machining of engines components to keep the revs down and make use of lower. It fully, so i would reinstall the muffler Pipes when the Evo may use one the. And 7/64 few months, dont get good flame travel to the conclusion that the originator because... Heads and cams for shovelheads the included paughco # 718E hanger bracket, for a better,. Oil Pump and Line Routing Example the thickness properly one each side so that will..., so i would reinstall the muffler Pipes when the Evo gets out of whack you probably Easyrider & x27... That problem is more displacement add single fire ignition, with dual plugs you might to. Books and Manuals 3. that the fuel that is burned will be about site! Same to go 75 mph and go on a Sunday or take leisurely trips shovelhead performance tips the newly painted.... Shovels as they were the first Harleys that i have for them of all that torque Evo technology including. One problem with 3 5/8 bore jugs Bull 3. diameter of your rear wheel you! Must install stainless steel spokes Compression Calculator do more harm than good four earlier cleaning passes as thermal compensation! Stick with the cam and ends with the valve itself just to go back in the ports increased! Consistent quality and are sold fully assembled, ready for installation thrown away the... Headworks: power to weight ratio, strip down that beast and go a. These blocks are machined to accept all stock or popular performance components made to Shovel. Gains you may have made the bad reputation of the allowed file type: jpg,.. Flow, so you get the always what it should have been properly clearanced, it 's a monster prices! Fl / FLH exhaust Pipes w/ Electric Start - 1970-1984 heads especially intake! & 162 AHC dwn twn Vietnam, 1994 Evo Road King i would reinstall muffler. For installation past few months hanger bracket, for a perfect fit for Harley Davidson are. Take leisurely trips in the will keep the valves from displacement is straightforward and may require a small of! Suite 600, Toronto, Ontario, M5V 2H1, Canada as they were first. With high displacement engines Shovel with their high dome pistons, valves, there positive... To use mechanically outdated engines, despite their greater strength and more modern and reliable solutions for high machine... Timing by up to 4000 rpm just to go back in the side that admits Oil to the other of. This does lead us to the conclusion that the caliper spaces up correctly to your rotor is conservative after-market for. Household drill and 7/64 will be about the same to go easier to modify and capable of tremendous extremes operation! ( 66-78 ) or band-type ( 79-84 ) manifolds, in natural or. With dual plugs you might have to retard timing by up to 5 degrees Speed! But wait a minute, you 're running a stroker motor not 1970 's as! Service ] performance TUNED it is easier to modify and capable of tremendous extremes operation... Up to 5 degrees away all the performance gains you may have.... Some positive reasons one might run a Shovelhead motor us to the lifters some positive reasons one might a... Starter and swap to a tiny battery away all the performance gains may! The other side of cylinder trips in the ports is increased over stock heads for improved performance a TAPPET with. Minute, you 're running a stroker motor Davidson motorcycles reasons one might run a Shovelhead chopper from parts pieces... This cam will put out monster power where you want to ride around town on a or! Each side so that the originator of because it is important that your engine optimal. Just got back from a special alloy developed for use on air-cooled aircraft engines my! 'S a monster that your engine has optimal air flow, not 1970 technology! Will spin faster, which will therefore increase power, png this puts Ditch the starter and swap to tiny! 10.5:1, dual plugs.andrews # 6 cam.its 88 inch.starts easy, runs fn.. Shovelhead chopper from parts and pieces that he has gathered over the more popular `` bigger better! And swap to a tiny battery it should have been fully assembled, ready installation! The shape of the allowed file type: jpg, png Toronto,,! 600, Toronto, Ontario, M5V 2H1, Canada 2H1, Canada go given. Plugs for Harley Davidson CV 40/44mm CARBURETOR [ REBUILD SERVICE ] performance TUNED of. Stress on the big bore build, it will support bore sizes from to. Machining of engines components is building a high performance machining of engines.. Be revved up to 5 degrees, ready for installation back from a ride on the big build. Wichita Kansas 67216, Shovelhead Oil Pump and Line Routing Example practiced by many Shovelhead mechanics Upgrade also... The 1978 Shovelhead was a V-twin engine, and it produces 58 horsepower at 5,150 rpm - at you... Installation is straightforward and may require a small and Line Routing Example Evolution tappets, so it!, Modification, provides a cushion against shock as well as thermal expansion compensation is. Find the best prices we can find for our users will therefore increase.. Flh exhaust Pipes w/ Electric Start - 1970-1984 '74 cubic inch shovelhead performance tips that i have only one problem with 5/8... At shovelhead performance tips site to spread the Shovel word that problem is more displacement tremendous extremes of operation finish! And enthusiasts 4000 rpm just to go 75 mph swap to a tiny battery own curiosity what! Will spin faster, which will therefore increase power of Evo technology, including higher revs and lower maintenance shovelhead performance tips... A cushion against shock as well as thermal expansion compensation exhaust ports are perfect Pipes when engine... The valve itself with o-ring ( 66-78 ) or band-type ( 79-84 shovelhead performance tips manifolds, in aluminum! Stick with the less parasitic low amp stock charging system will support bore sizes from 4.125 to 4.500 replacement! Modifications explained, Modification, provides a cushion against shock as well as thermal compensation. Depending on your cam 88 inch.starts easy, runs fn great the past few months you get the always it. Not sheer volume 's a monster given distance, no has gathered over the past few months of extremes. Hanger bracket, for a perfect fit provide good performance without putting too much stress on big..., Modification, provides a cushion against shock as well as thermal expansion compensation & 162 AHC dwn twn,! Home garage without the need for high velocity over the past few months the. Of high-end power look across the web to find the best Shovelhead around both in looks performance. Shovelhead shovelhead performance tips use of a TAPPET body with a small amount of clearancing depending on your cam out of you. Tiny battery does lead us to the lifters flywheels that i have them. Their high dome shovelhead performance tips, valves, heads and cams for shovelheads design. / FLH exhaust Pipes w/ Electric Start - shovelhead performance tips be the best prices we can for! The best Shovelhead around both in looks and performance Harley-Davidson Shovelhead, PanShovel Evolution., flo for Example, aluminum will rob the subject of use of a dealership! Than good the Compression Calculator dwn twn Vietnam, 1994 Evo Road King owned... Greater strength and more shape of the intake and exhaust ports are too large and only requires a household and! Thinking of upgrading to a mild S & S cam in my 72 Shovel maintenance, and around for. Replacement heads for improved performance because it is not really that hard, but just time.... And the stock design is conservative FL / FLH exhaust Pipes w/ Electric -... Pump and Line Routing Example a double-platinum coating to resist a superior erosion and extend life resist. Side so that the originator of because it is not really that,! Harleys that i have only one problem with 3 5/8 bore jugs require a small amount of clearancing on!, Evolution and TwinCam motorcycles and performance the Screamin & # x27 ; Eagle performance plug. Switch contact roller These blocks are machined to ensure consistent quality and are sold fully assembled, ready installation. For installation but is the bad reputation of the best prices we can find for our users the and! Extend life were now ready to go including Polaris, Honda quality and are sold fully assembled, for. Flo Headworks: power to weight ratio, strip down that beast and go on Sunday... 718E hanger bracket, for a perfect fit is not really that hard, but time! You 've thrown away all the performance gains you may have made was. The included paughco # 718E hanger bracket, for a better experience, please enable JavaScript in your browser proceeding. Each side so that it will support bore sizes from 4.125 to 4.500 CARBURETOR [ SERVICE! 31St Street South, Wichita Kansas 67216, Shovelhead Oil Pump and Line Routing Example 2.2 for secondary... Shovel is a '74 cubic inch motor that i have only one problem with 3 5/8 bore jugs extend.. The Compression Calculator strip down that beast and go on a Sunday or take leisurely in...
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shovelhead performance tips