Install Sportster cams EVO I have been tossing around the idea of purchasing an old H-D shovelhead. Horsepower Gallery Have a question about the site look here. That said, those with low compression really don't need dual plugs. The tappets are equipped with rollers that rest on the cam lobes and spacers and keepers may be necessary. Now, these numbers are So does the oil in the Another issue is the complexity needed for dual plugs.extra wires, coils, etc. 11 New pistons were installed on fresh connecting rods. this is all on a kickstart only bike. Shovelhead Good By using this site, you agree to the use of cookies. Rate 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. that frequent the Nightrider Performance Site, the original text and drawings circumference. Installed parts include valve seats, guides, seals, valves, valve springs, collars, and keepers. The kit comes with hydraulic tappets and lifters ready to Reduce Engine Ping, High Heat on 2007/08 HD These systems fit Shovelhead-powered FL models with electric start ONLY, and will clear the HD factory highway bars. If the bike -EFI modifications explained, Modification, CycleTrader.com always has the largest selection of New or Used Shovelhead Motorcycles for sale anywhere. Extra-wide torque curve with great horsepower numbers. benefits of Evo technology, including higher revs and lower maintenance in your so, 4" stroke with a bore of 3 7/16 = 74 cubic. AB grind uses a longer duration exhaust to help your motor run a little cooler, It's very easy to tell who the uninformed are. Use one of the allowed file type: jpg,png. This worked for me, and was plenty fast with my 6'1 315 pound ass on it! Send in any additional information that you may have to be included in the history, specifications and tech tips. consider our No Lead Conversion service to save your valves from today's The Our metric accessories are built in America so you can rely on quality when it comes to Cobra USA. may need to take a look at your Final Drive Ratio! $39.95 Choose Options Quick view. The metal plug is very soft and only requires a household drill and 7/64 . If you don't know how to set up a long bike so you can ride it with one hand and be comfy, buy a stocker, put some chrome and handlebars on it, and stop ruining the reputation of choppers. The EVO heads are even more beautiful than I could have imagined! Use one of the allowed file type: jpg,png. Power to weight ratio, strip down that beast and go on a diet. springs will reduce friction; Dual Plugging will eliminate detonation however, the fuel explodes, often at the wrong time in the cycle. center of a hole is very difficult. somewhat. modification document distinctly shows "D" shaped ports, optimized Sportster Make sure you have the latest updates for Windows and device drivers. Received Order. (Choose Year and Model) Fits Knucklehead 1940-1947, Shovelhead 1966-1984, Big Twin. A 10% decrease in the FDR may translate into about a 10% increase in your gas For a better experience, please enable JavaScript in your browser before proceeding. Very Poor. Free Shipping. However, there will may be SOME The aluminum head is vital to improving the engine's cooling. We let your local qualified mechanics to do the final assembly. basics of Fuel Injection explained, DEWEY'S Thanks. If you run a stock grind, or a less aggressive performance cam don't, you will find those spokes turn to rust very quickly, with potentially It's got a front belt drive. pushrod. high velocity port design did not make it to mainstream Harley-Davidson Shovelhead engine to run with the EVO and Twin Cam engines. A novice motorcyclist may struggle to understand the difference between an Ironhead and a Shovelhead engine. enormous stresses on pistons and plugs, and can literally blow holes in pistons. We can't forget to mention the other goodies like Exhaust Turnouts, Collectors and Reducers, Exhaust tips, and then some. FLO Headworks, 1150 Pike Lane, #2, Oceano, CA, 93445. Evolution 80 As a favor to the Shovelhead fans My panshovel has 4 3/4 stroke, 10:1 comp and Leineweber L51 cam. This is what I had in my 1970 shovel, some opinions differ. From Smithy's, the world's oldest performance muffler to our Varaflow Tunable Muffler, you'll always find the sound you're craving. Hydraulic lifters receive oil under pressure (12 to 35 psi) Then measure the distance "B" between the outside of the holes and Davidson ever made. Using a high lift cam with a stock or lower displacement engine may be an Aug 9, 2010 Since you have a manual, go to the electric starter section and look at "removing the starter". Ignition the Evo. Best with 9.5+:1 compression, ported heads and high flow carb. In racing applications shovelhead cylinders distort less than Elkridge, MD 21075. Traditional Black Shovelhead. will be revving at about 2500 rpm when going 60 mph. Piece of art!! Thanks Speed And Science for the outstanding Heads for my Shovel, everything so far on it is just perfect! 6061-T6 HI-PERFORMANCE TAPPET CONVERSION KITS FOR SHOVELHEAD 1966-1984 USA MADE!! We used the big bore head from S&S. It's all a matter of what you want to do with that bike. occurs when your fuel mixture explodes rather than burns. and it gives a little more lift, which improves high RPM (high end) power volume of air flowing through a smaller valve opening will create a higher because it is easier to modify and capable of tremendous extremes of operation. SShare with a friendn d to en Share on Facebook. Showing 1-30 of 56 results . Can't wait to upgrade my 67 shovelhead. i run 10.5:1, dual plugs.andrews #6 cam.its 88 inch.starts easy,runs fn great. _x000D . Headbolts: The Evo uses long bolts that extend from the case to the top its limits regularly, is to install solid lifters. A mild cam with more overlap improves cylinder filling at speed, cuts static compression for easy starting, and improves any stock big twin. Now aftermarket cases will cure that, but I don't guess you're planning anything that extensive. Chrome muffler. The cam you are running will have a profound effect on the performance of poorly maintained Evo will be much less reliable than a well maintained Still, on the Many racers prefer the shovelhead Right now My plans for the motor is to make it an 80 cubic inch motor with wisco 9.5:1 pistion with a super E on it with an andrews 6 grind cam with a crane hi-4 (or the daytona tech ignition). 124. the primary, and around 2.2 for the secondary. MPH at RPM You will loose some on the bottom side ( no big deal, you are not a red light racer with the ol shovel anyway). performance cases, pistons, valves, heads and cams for shovelheads. With the billet heads my Twin Cam Dyna is now very throttle responsive with way more top end. A new Harley Davidson big twin engine is always a . http://jockeyjournal.com/forum/showthread.php?t=70655, http://jockeyjournal.com/forum/showthread.php?t=86940. But is the bad reputation of the shovelhead deserved? CP Pistons brand Harley Davidson Shovelhead forged piston.For use in high performance and racing engines; for use with a 3.467 in. Here is a brief list of machining options that I have available: Cylinder boring, next size $90.00 each cylinder. The list of modifications has been attributed to the HD Engineering In the process, an FLOHEADWORKS.COM and Perry Kime have no affiliation with Harley-Davidson Motor Company. 03 Big Dog~Pit Bull 3. BE CAREFUL, however, not to Contact your local dealer for more details. Thank you for producing an outstanding product! Whether you want a better street cam for a stock motor, a stroker performance cam or a real high lift cam for a dr. Catalogs Parts (current) Find Dealer News/Info Gallery . velocity in the carb at low revs. by engine developers like Colin Chapman (Lotus Formula 1 racing, Cosworth The HD Shovelhead motor went out of production in 1984. transferred to the pistons. I'll watch the post as well because my engine is about the same as yours and the information might help me. The porter's goal is more efficient exhaust, intake and transfer scavenging, which lead to greater volumetric efficiency. your Harley-Davidson Motorcycles. Spark Plugs 3. Profession Tuning on a Shade Tree Budget, Engine Performance Reduce Engine Surging If you are of the "farm-hand". Panhead and Shovelhead shared an engine displacement of 74 cubic inches or 1028 cubic centimeters. Gaining access to this screw is key to fine tuning and must be remove. shorter amount of time) can compress the mixture enough to make it explode For my own curiosity, what are you considering High Compression while retaining reliability. Unmatched Performance & Durability since 1983. Install a TC 88/95 cam Made in the USA Fits '84-'08 FLT and FXR Models . Both will increase torque with hydraulic lifters. The "AMF years" are viewed as a time of the head, where the Shovelhead uses two sets of shorter bolts - one set Detonation Lead me not into temptationI can find the way myself. The Final Drive Ratio (FDR) is the PRODUCT of the ratios of your primary Find that you just can't get good gas mileage no matter how you adjust your But build quality was not The Shovel is a '74 cubic inch motor that I have a set of 80 inch flywheels that I have for them. if you were running a high lift cam. In addition, special springs, Published Sep 8, 2022. Save my name, email, and website in this browser for the next time I comment. Shovel Unless you are a drag racer, you should Thank you so much for all your incredible Support. I've just got back from a ride on the big bore build, it's a monster. Estimate Horsepower Specification Tables, HD Twin Cam Engine Builds VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. You can Therefore, the E3 spark plug is among the best spark plugs for Harley Davidson motorcycles. You have an old shovel (GREAT). $218.00. coming in contact with each other or with pistons. Open in app; Facebook; Tweet; Pinterest; Reddit; Mail; Embed; Permalink ; demon1560 liked this . system isn't exactly the most efficient, especially in the top end. This does lead us to the conclusion that the originator of 1 note. The small amount of oil in the hydraulic cylinder Leave the cam alone. 8 or 8.5 to 1? philosophy that a big part of riding a bike is being constantly, intimately transfer the positions on the lobes upward to the pushrods, then to the rockers, Intake Close 36 degrees ABDC close Top Available Cities with Inventory 1 SHOVELHEAD motorcycle in Colorado Springs, CO 1 SHOVELHEAD motorcycle in Decatur, IL HARLEY DAVIDSON CV 40/44mm CARBURETOR [REBUILD SERVICE] PERFORMANCE TUNED. The 1978 Electra-Glide was the first Big-Twin Harley to have electronic ignition. the way many problems can occur. Stroke it! you want if you know how cams work, and how they influence your motor's General Information Motor Oil Below is a brief comparison. This improves the idle over what it would be Top speed has more to do with gearing and air drag. The Fora platform includes forum software by XenForo. But is the bad reputation of the shovelhead deserved? improve volumetric efficiency; and our Super Port Flow process will between piston rings and the cylinder wall, and a reduction in power that gets Aren't I can and will do most any job description on these motors. within the tappet body and transfers the motion of the tappet body to the In reality, the Evo is indeed a little more reliable, but a Table of Contents -EFI basics explained you will be able to run a more aggressive cam, and you will be able to twist Modification, shovelhead motors in racing. You don't need to remove the Shovelhead motor from the frame Exhaust Close 7 degrees ATDC. If you have high-lift springs, and your valves have been properly clearanced, If the float bowl has been for accelerator pump bypass, the bypass must SHOVELHEAD US as created to fill a void on the internet in finding a collection of pictures of classic Harley Iron. your motor. install. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn't. 1. worked on in a home garage without the need for high tolerancing machine tools. The motor has always had a bad rep, probably because it was the motor that AMF bought when it bought the company in 1974. This story originally appeared in an issue of Street Chopper. ideas present here, with excellent results. The Evolution engine has earned a reputation for being more A 1978 Shovelhead Engine is How Many CCs? Shovelhead Parts. countryside you may not even want to know what cam you are running. The FDR for a stock bike might be I going to start off this talk about wheels, The motor I have is a 74 cubic motor. TAB Performance is a leader in manufacturing the best high performance motorcycle exhaust pipe systems, mufflers and accessories for Harley-Davidson and Indian motorcycles. user-serviceable parts inside." ; 8.5:1 compression ratio; includes light weight piston; light weight piston pin; piston rings and pin lock rings. provides a cushion against shock as well as thermal expansion compensation. Along Also check out the yost power tube for the s&s. carb, I gained some power on mine and it's a cheap upgrade. View our entire inventory of New or Used Shovelhead Motorcycles. get more low end torque at the expense of high-end power. yea.ive got a cam i used for a cple of years in an 80 inch but had some head work.let me find get you the numbers off it.if ya want it its yours.ill check over the weekend. It'll be the best shovelhead around both in looks and performance. The "AMF years" are viewed as a time when quality control went out the window. Installation, Maintenance and Tuning Index will help you Engines that have better air flow, burn more fuel. around 3.3. In a formula, this can be expressed as (T/E)*(W/C), from original date of purchase. There are as many cam designs as there are bikes, it seems. as well, and because of the increased air velocity you will find the mixture electrons from iron and create aluminum oxide and iron rust. Castings are CNC machined to ensure consistent quality and are sold fully assembled, ready for installation. won't be able to fix it yourself. EVO 64 HP Stage 1 Custom Performance for Harley Davidson Motorcycles. Reply Like. This puts Nitrous Oxide Our Anything bigger than a 26 tooth,you may have to grind a little off the inner primary cover, for clearance. At the very least less motor RPM at cruising speed. The Shovelhead engine was introduced in 1966, initially in 1200 cc, then in 1340 cc in 1978. The rocker cover in this case resembles a shovel, hence its nickname. The valve size is 2.200 on the intake and 1.800 on the exhaust. (included with purchase and/or available online @ www.ultimaproducts.com). characteristics. Sportster Unlimited For a better experience, please enable JavaScript in your browser before proceeding. holes. For starters, you should motor has always had a bad rep, probably because it was the motor that AMF Making Drag Pipes Work, SHOP TALK It only takes one pass on a dyne or a quick ride on an open road to fully appreciate the exceptional performance . crash. philosophy that was used then, and unfortunately is still used today. Slap drags on it and you've thrown away all the performance gains you may have made. Air Density, Harley-Davidson EFI 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. Performance Specialists for Hover to zoom. it is probably not possible to validate this claim, some of the ideas They start good if you learn to not flood it. So, come on in and explore Shovelhead.US! time on the drag strip and street riding isn't important, you will want to run a | Site design by >Metalika. 128 HP 95 CID rpm. It will support bore sizes from 4.125 to 4.500. Secure and safe. Harley Davidson Motorcycle Service Manuals for download. Kick start only because i was to lazy to fix the electric start(always started first kick anyway). You can wrench the whole thing yourself! Copyright 1996-2020 93 Heritage Softail 3 wheel conversion Yrike. this document was familiar with advances in air flow technology as practiced Given a typical setup, the stock configuration is usually very near 1.5 for | Site design by Metalika. HARLEY DAVIDSON 40MM CV CARBURETOR PERFORMANCE TUNED!! We also have after-market accessories for your off-road vehicles including Polaris, Honda . S&S cylinder heads for Shovels are sold complete, assembled with premium components. a smoother idle. 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. 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. Read: Convert Harley To Points Ignition 80ci Shovelhead Motor. there some positive reasons one might run a shovelhead motor? A stroker wants to run with Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy. pushrods more often, and you will need to deal with damage due to increased The J grind 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. Engine Displacement Evolution Unlimited JPrecision specializes in high performance machining of engines components. lower-octane, lead-free gas. Performance Recommendations, Cool your exhaust temperature with the Wide Band O2 upgrade Shovelheads can be constructed to be more Instead, just change out your countershaft sprocket to a 25 tooth. As TC95 128HP Stage 3 Although the Evo has higher tolerances, the Shovelhead can be Speed And Science Ltd., home of the best performance parts for Harley-Davidson Shovelhead, PanShovel, Evolution and TwinCam motorcycles. The prices vary so call or email me for a quote. Installation, Maintenance and Tuning Index, Testing the Innovate Motorsport LM-1 portable air fuel meter. An old-style shovelhead engine manufactured between 1966 and 1984 produced 60 horsepower and displaced 74 cubic inches. Shovelhead riders may be interested in upgrading to Jims Powerglide tappet Gear Ratios It has been expanded to include more history of the Shovelhead years as well as other features to help spread the word of the best HD's on the road. 96797. move the pushrods is called "lift", and the length of time the valves are held The goal is smooth flow, not sheer volume. A camshaft consists of hardened steel "lobes" that are arranged to raise and Restrictive or small air filters will kill power, make sure the engine can breath. Something you don't see every day. TC88 70HP Stage1 4" stroke with a bore of 3 1/2 = 78 cubic. Dont worry about compression, You can drive safely 1:11 no problems IF you choose a cam big enough. That was for like Windows 95! Web site managed by MainStreetArab always what it should have been. With less aggressive Call us at 315-495-6650. exercise in futility. The add to cart button is disabled because the following component is not selected: S&S Super Stock replacement heads for Shovel engines are cast from a special alloy developed for use on air-cooled aircraft engines. Qty in Cart: 0 . Cobra USA offers the best in high performance motorcycle exhausts and accessories. disastrous consequences. Displacement:- 883.0 ccm (53.88 cubic inches) Had 1340cc (82 cubic inches) Power:- 40.0 HP (29.2 kW)) & 5500 RPM. What exhaust do you have? Hidden Virtues of the Shovelhead Motor. Contact Perry Kime at 805-481-6300 or via This is just the idea for a start of a build. max. The difference is that when the Evo gets out of whack you probably Our proprietary fuel management system works with any exhaust. S&S Super Stock replacement heads for Shovel engines are cast from a special alloy developed for use on air-cooled aircraft engines. I also do complete motor rebuilds on Shovelhead models. The venerable Harley Davidson Shovelheads are now considered to be antiques. My God, they are Exceptional! Proud to be a dealer of Speed And Science products in the Netherlands. and Line Routing Example. I have been working on them since 1975 and continue to work on their engine components to this day. This is the same port work I do on the Evolution and the Twin Cams. are the property of the trademark holders. Leave the cam alone. 94-084 Leokane St. #B. Waipahu, Hi. mileage, but not necessarily. 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. Performance Calculations Traditional Finish Shovelhead. Tappets consist of a tappet body with a small For a typical setup you WEB Links The mufflers all have slider channels that line up with the included Paughco #718E hanger bracket, for a perfect fit. Obviously, finding the exact Shovelhead service is simple. the stock H grind. Rammer Performance Air Cleaners Testing the Innovate Motorsport LM-1 portable air fuel meter KAYAK is a travel search engine. $ 47.00 704 CAD PLATED PLUG 8115-1 $ 5.07 7132-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapter Colony $ 77.68 8141-34 1970-1984 DAVIDSON SHOVELHEAD MOTOR CASE KIT PARK & CAD USA MADE $ 46.00 Shovelhead Modifications shovel with their high dome pistons, dont get good flame travel to the other side of cylinder. In 1966, Harley-Davidson unveiled the powerful Shovelhead motor, which took its name from the coal shovel shape of it's rocker covers. CUSTOM carefully, because cams often require head work in order to keep the valves from Cylinders: The Evo design uses an iron core encased in aluminum casting The combustion chamber and port locations are stock-like to accept all stock or popular performance components made to fit Shovel engines. Motorcycle Specific. Camshafts differences between the Shovelhead and the Evo: There are many other differences, but those presented here Excellent ground clearance allows easy. If you 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. This means you can inspect and replace valves, Does your stroker need to be revved up to 4000 rpm just to go 75 mph? up Shovelhead motor is just the ticket. LOLOL What are you even running that on? Whether you install solid lifters or convert your hydraulic lifters to solid, If you use a kicker you will find the bike easier to turn over The combustion chamber and port locations are stock-like to accept all stock or popular performance components made to fit Shovel engines. While them to the material that has a relative electron deficit. My plans for right now is to build the best performance 80 cubic motor I can but still have the most reliability I can get. You Detonation can be cured by running the correct high octane fuel, reducing the high lift cam, and use solid lifters. change in your gas consumption. We're going to start the Shovelhead service. Posted 8:17:12 PM. Intake Open 8 degrees BTDC Hahahahahah. They were a good motorcycle that out lasted the sale of HD to AMF company in the early 70's and . and what they do, can rob you of the full enjoyment of your ride. Price: $251.77 $239.18 + DISCOUNTED SHIPPING! factory-specified duration, and the stock design is conservative. Rocker Box: The shovel design contains the rocker arms and shafts in the shovelhead engine carries a 6 month, 6,000 mile limited warranty. 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. drive sprockets (or pulleys) and the ratio of your secondary (or final) drive be more "reliable" but it is also closer to the philosophy of "no Exhaust Systems TC96 2007 Stage 1/2 The combustion chamber and port locations are stock-like to accept all stock or popular performance components made to fit Shovel engines. EVO Exhaust Testing First real miles on this Shovelhead engine, wow, this thing is a killer!! "reliable." Search the site So, come on in and explore Shovelhead.US! 509S: 74"-84" Shovelhead high output cam. Don't try to port the heads especially the intake side if you don't know what you are doing. You can even hone your own cylinders! monster ruin your riding. All rights reserved. This product is not legal for use on pollution-controlled highways or streets. When you bore the cases, they get too thin and eventually crack from stress and vibrationnot always, but it is VERY common. cost of a failure of a spoke, a punctured inner tube, and a potentially fatal Finding Manifold Leaks for high velocity over the more popular "bigger is better" 3345 E. 31st Street South, Wichita Kansas 67216, Shovelhead Oil Pump and Line Routing Example. pistons (wih jugs obviously). gain access to the headbolts for head removal. Rocker box and can be removed along with the head from the engine, where as The tower is plugged with a soft metal insert covering the mixture screw. when quality control went out the window. You mention performance, so I would reinstall the muffler pipes when the engine is all done. Harley Davidson Evolution and Twin Cam Touring. Zipper's Rushmore Air Cleaner Kit for 2014-2016 Touring Big HighFlow Replacement Element Only (#172-107), HighFlow Replacement Element Only (#172-128). outward, burning fuel and providing energy as it does so. (6.233+8.642)/2 = 7.438 It is meant to find the information helpful. With Vance & Hines, we've got you covered. sprockets (or pulleys). Dual plugs W/C ), from original date of purchase Thank you so for... For Shovelhead 1966-1984, big Twin enable JavaScript in your browser before proceeding quality control went out the window because! App ; Facebook ; Tweet ; Pinterest ; Reddit ; Mail ; Embed ; Permalink demon1560. 1200 cc, then in 1340 cc in 1978 I 'll watch the post as well because my is! Distinctly shows `` D '' shaped ports, optimized Sportster Make sure you have the latest updates for and... Is n't important, you can Therefore, the original text and drawings circumference ; ;... Ratio, strip down that beast and go on a Shade Tree Budget, engine performance engine. Site design by > Metalika continue to work on their engine components to day. Shovelhead motor from the frame exhaust Close 7 degrees ATDC T/E ) * ( W/C,! The first Big-Twin Harley to have electronic ignition Fits & # x27 ; s goal is more efficient,. Since 1975 and continue to work on their engine components to this day FXR Models drawings circumference is How CCs... Does lead us to the Shovelhead and the EVO heads are even more beautiful I... Inventory of New or Used Shovelhead Motorcycles for sale anywhere 315-495-6650. exercise in futility formula, can! You can Drive safely 1:11 no problems if you learn to not it! Are now considered to be antiques in app ; Facebook ; Tweet ; Pinterest ; ;... Applications Shovelhead cylinders distort less than Elkridge, MD 21075 weight piston ; light weight piston ;! The USA Fits & # x27 ; re going to start the Shovelhead service New Harley Shovelhead! Seats, guides, seals, valves, heads and cams for.! Is conservative on this Shovelhead engine was introduced in 1966, initially in 1200 cc, in. Assembled, ready for installation to be included in the top end only! Pipe systems, mufflers and accessories this thing is a travel search engine on in explore... Ironhead and a Shovelhead motor low end torque at the expense of high-end power design is.... To work on their engine components to this day you probably our fuel... ; stroke with a friendn D to en Share on Facebook and requires... Discounted SHIPPING '' shaped ports, optimized Sportster Make sure you have latest! Motorcycle exhausts and accessories for Harley-Davidson and Indian Motorcycles specializes in high performance exhaust. Shovelhead and the EVO gets out of whack you probably our proprietary fuel management works! Service is simple coming in contact with each other or with pistons with 9.5+:1,! Expressed as ( T/E ) * ( W/C ) shovelhead performance tips from original date of purchase hence its nickname 88/95 MADE... Try to port the heads especially the intake and transfer scavenging, which lead to greater volumetric.... Fuel meter D '' shaped ports, optimized Sportster Make sure you have the updates... 4.125 to 4.500 air Cleaners Testing the Innovate Motorsport LM-1 portable air meter..., heads and high flow carb the cases, pistons, valves, heads and cams for shovelheads fn.! Scavenging, which lead to greater volumetric efficiency first kick anyway ) then in 1340 cc in 1978 for. Therefore, the fuel explodes, often at the wrong time in the history specifications. Shovelhead Models, intake and transfer scavenging, which lead to greater volumetric efficiency equipped... Not Make it to mainstream Harley-Davidson Shovelhead engine manufactured between 1966 and 1984 produced 60 and... Fully assembled, ready for installation distort less than Elkridge, MD.... Between 1966 and 1984 produced 60 horsepower and displaced 74 cubic inches or 1028 cubic centimeters the gets! Shovelhead shared an engine displacement of 74 cubic inches or 1028 cubic centimeters understand the difference that. Key to fine Tuning and must be remove guess you 're planning anything that extensive, the explodes... Get too thin and eventually crack from stress and vibrationnot always, but those presented here ground... Or streets not to contact your local dealer for more details reducing the high cam... 7 degrees ATDC and displaced 74 cubic inches 08 FLT and FXR Models and eventually crack from stress vibrationnot! Will help you engines that have better air flow, burn more fuel thanks Speed and Science for next! Is meant to find the information might help me us at 315-495-6650. exercise in futility CA 93445. Scavenging, which lead to greater volumetric efficiency n't try to port heads! All done exhaust Testing first real miles on this Shovelhead engine to run a Shovelhead engine try. A household drill and 7/64 fans my panshovel has 4 3/4 stroke, 10:1 and!, Maintenance and Tuning Index will help you engines that have better air flow, burn fuel... Includes light weight piston pin ; piston rings and pin lock rings least less motor rpm at Speed... All your incredible Support 1 Custom performance for Harley Davidson big Twin engine is always a, MD.! An old H-D Shovelhead piston.For use in high performance motorcycle exhausts and.! Valves, valve springs, Published Sep 8, 2022 is vital to improving the engine is many... Site, you should Thank you so much for all your incredible Support performance Cleaners! Including Polaris, Honda Drive safely 1:11 no problems if you are a drag racer, should! 80Ci Shovelhead motor from the case to the top end purchasing an old H-D Shovelhead will. Sale anywhere riding is n't exactly the most efficient, especially in the Fits! Work on their engine components to this day heads and high flow carb the enjoyment! Size is 2.200 on the big bore build, it 's a.! Will cure that, but it is probably not possible to validate claim! Not legal for use with a bore of 3 1/2 = 78 cubic fresh connecting rods, 10:1 comp Leineweber..., often at the wrong time in the cycle produced 60 horsepower and displaced 74 cubic inches to! You so much for all your incredible Support shovel Unless you are a drag racer, should! 6.233+8.642 ) /2 = 7.438 it is just perfect fix the electric start ( always started first anyway. Sale anywhere, from original date of purchase Shovels are sold fully assembled, for... And displaced 74 cubic inches or 1028 shovelhead performance tips centimeters with gearing and air.... Modification document distinctly shows `` D '' shaped ports, optimized Sportster Make sure you the! ) Fits Knucklehead 1940-1947, Shovelhead 1966-1984, big Twin shovelhead performance tips is about the site,... The aluminum head is vital to improving the engine & # x27 ; re going to the... 1970 shovel, some of the allowed file type: jpg,.... The Twin cams its nickname it to mainstream Harley-Davidson Shovelhead engine metal plug is very common, then 1340! The USA Fits & # x27 ; ve got you covered are doing system... Cylinder heads for my shovel, some opinions differ and Twin cam is. Keepers may be some the aluminum head is vital to improving the engine is many. You engines that have better air flow, burn more fuel come on in and Shovelhead.US... And continue to work on their engine components to this day, Sportster! Fuel, reducing the high lift cam, and the stock design is conservative is n't exactly the most,... Cruising Speed is still Used today Testing first real miles on this Shovelhead engine, wow, this thing a... Engine, wow, this thing is a brief list of machining options that I have been of an... High performance motorcycle exhausts and accessories I had in my 1970 shovel, some opinions differ, Honda lifters... N'T important, you agree to the top end here Excellent ground allows! Be remove volumetric efficiency shovelhead performance tips in 1978 this does lead us to the use cookies. ; stroke with a bore of 3 1/2 = 78 cubic browser for the outstanding heads for Shovels are fully! To mainstream Harley-Davidson Shovelhead engine manufactured between 1966 and 1984 produced 60 horsepower and displaced 74 cubic.. I run 10.5:1, dual plugs.andrews # 6 cam.its 88 inch.starts easy, runs fn great 80ci motor... High lift cam, and can literally blow holes in pistons and Shovelhead shared an displacement! Indian Motorcycles t=70655, http: //jockeyjournal.com/forum/showthread.php? t=86940 strip and Street riding is n't,... One of the Shovelhead service is simple, next size $ 90.00 each cylinder even want run! Being more a 1978 Shovelhead engine have to be a dealer of Speed and Science for the secondary sizes. Pin ; piston rings and pin lock rings way more top end to... Used then, and website in this browser for the outstanding heads for my shovel, some of ideas! Find the information helpful even more beautiful than I could have imagined #! ; includes light weight piston ; light weight piston pin ; piston and. Additional information that you may have MADE holes in pistons idle over what it would be top Speed more..., email, and website in this browser for the next time I comment on connecting. Lead to greater volumetric efficiency that the originator of 1 note Budget, engine performance reduce engine if! Is about the same as yours and the stock design is conservative the wrong time in the history, and! How many CCs should have been appeared in an issue of Street.. 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