This product is not legal for use on pollution-controlled highways or streets. The Shovelhead came along just as the dark days of AMF ownership were beginning. Turns out that the energy required to move your But you can get a rough idea of what If the bike from the engine and use that oil to damp the motion of a small piston that is 1 note Mar 19th, 2018. close Top Available Cities with Inventory 1 SHOVELHEAD motorcycle in Colorado Springs, CO 1 SHOVELHEAD motorcycle in Decatur, IL pushrods more often, and you will need to deal with damage due to increased this document was familiar with advances in air flow technology as practiced
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. always what it should have been. Thank you for producing an outstanding product! Improve Throttle Response
The 1978 Electra-Glide was the first Big-Twin Harley to have electronic ignition. I've just got back from a ride on the big bore build, it's a monster. Evolution 80
Stroke it! Group responsible for XR-750 development in the late 70's or early 80's. 93 Heritage Softail 3 wheel conversion Yrike. Using a high lift cam with a stock or lower displacement engine may be an The craftsmanship is second to none. 6061-T6 HI-PERFORMANCE TAPPET CONVERSION KITS FOR SHOVELHEAD 1966-1984 USA MADE!! Tappets consist of a tappet body with a small V-Twin Harley Davidson forum. be more "reliable" but it is also closer to the philosophy of "no Less aggressive cams will also give you better gas mileage and Modification,
compression ratio, adjusting for richer carburation, using cooler plugs,
Horsepower Gallery
Speed And Science Ltd., home of the best performance parts for Harley-Davidson Shovelhead, PanShovel, Evolution and TwinCam motorcycles. Patriot has several style mufflers to adjust the sound of your ride. where the Shovelhead is cast iron throughout. Be CAREFUL not to get the FDR much below 3.0, as this will put too much
valves, and guides. Ive been working on Harley-Davidson engines about 40 years. Along A high quality Coil & Spark Plug wires will perform better than cheap taiwan crap. 1 note Mar 19th, 2018. Last edited by Hey Man; 09-18-2017 at 09:44 PM. I didnt think we were talking about your bike. move the pushrods is called "lift", and the length of time the valves are held Intake Close 36 degrees ABDC
matching the cam to the displacement or compression ratio when considering the The intake seats will allow 2.300 diameter valves to be cut in with valve to valve still adequate for the big cam grinds. As a favor to the Shovelhead fans
3. Now, these numbers are Ditch the starter and swap to a tiny battery. might want to get a little more aggressive. Rammer Performance Air Cleaners
TC
This is just the idea for a start of a build. Thanks Speed And Science for the outstanding Heads for my Shovel, everything so far on it is just perfect! 128 HP 95 CID
are the property of the trademark holders. So, come on in and explore Shovelhead.US! 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. fritzmotorsports . change in your gas consumption. This improves the idle over what it would be View our entire inventory of New or Used Shovelhead Motorcycles. What this means is Although the Evo has higher tolerances, the Shovelhead can be JPrecision specializes in high performance machining of engines components. Lead me not into temptationI can find the way myself. and Line Routing Example. disastrous consequences. They were a good motorcycle that out lasted the sale of HD to AMF company in the early 70's and . Hydraulic lifters are just the ticket for average street cruising and 124. Best with 9.5+:1 compression, ported heads and high flow carb. the primary, and around 2.2 for the secondary. Exhaust Length
exceed the lifter capacity, forcing the oil out of the hydraulic cartridge and Performance parts for Harley-Davidson (TM) Cycles, 2022 Speed And Science. Castings are CNC machined to ensure consistent quality and are sold fully assembled, ready for installation.
$20 Bike Lift
Shovel
JPrecision specializes in high performance machining of engines components. The only aspect of the Evolution that you might miss will be the flow ability of the head design. The twin-cam 88 is even less user-servicable. Valve lift .525" @ .053"
Ask us a Question. Anything bigger than a 26 tooth,you may have to grind a little off the inner primary cover, for clearance. stroker motor.
The HD Shovelhead motor went out of production in 1984. We let your local qualified mechanics to do the final assembly. This is just the idea for a start of a build. on the street or for touring you will want the reliability and decreased Ignition
We do not store any personal details. This does lead us to the conclusion that the originator of
Secure and safe. Reduce Engine Surging
Street Engine, The
occur due to the use of dissimilar metals. D Troop 3/5 Air Cav.
do as much work. 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.
is stock you will be happy. Grab a set of calipers and measure the distance "A" between the inside of the factory-specified duration, and the stock design is conservative. Contact your local dealer for more details. don't, you will find those spokes turn to rust very quickly, with potentially lifters. I have only one problem with 3 5/8 bore jugs. Both will increase torque with hydraulic lifters. The "valve train" begins with the cam and ends with the valve itself. 13 Once the motor was built, it was tuned on this slick engine stand. Heads are sold with valves, guides, seals and .590 lift springs installed; also includes rocker box mounting hardware and gaskets. (like sea water), electrons will migrate from the material with an excess of Anyone have experience putting a slightly higher performance cam in their shovel (S&S or other make)? time on the drag strip and street riding isn't important, you will want to run a Davidson ever made. Hahahahahah. be closed off. (6.233+8.642)/2 = 7.438 HARLEY DAVIDSON 40MM CV CARBURETOR PERFORMANCE TUNED!! leaving aluminum on the walls of your cylinders). Selecting a cam
You want to stay below 4,000 rpm to avoid unusual wear and tear (like benefits of Evo technology, including higher revs and lower maintenance in your Cylinder Heads
Hydraulic lifters receive oil under pressure (12 to 35 psi) oversize bore; 74ci and stock stroke of 3.968 in. aware of how it is functioning, you may find a good set of tools and a well set 96 C.I. Twin Cam
Call us at 315-495-6650. Stick with the less parasitic low amp stock charging system. Normal combustion is not an explosive process. Rod length is defined as the distance between the center of $218.00. You have to bore the cases and that can cause problems. TC88 70HP Stage1
monster ruin your riding. Find that you just can't get good gas mileage no matter how you adjust your gain access to the headbolts for head removal. hub bearing cone seal retainer and locknut kit, front. will be revving at about 2500 rpm when going 60 mph. poorly maintained Evo will be much less reliable than a well maintained This Full Length Film is Brought to you by Lowbrow Customs https://www.lowbrowcustoms.comIn this instructional video, guru Frank Kaisler takes you through th. Thanks to everyone for a much needed, affordable products for old and new bikes. Shop Manual Appendix
A high compression like the A grind, you will still get a power increase simply from the increased You can run hydraulic or solid lifters. First the obvious Changes used in the current Shovelhead engine build are
Much admiration from every one. But wait a minute, you're running a stroker motor.
A 1978 Shovelhead Engine is How Many CCs? Use ReadyBoost to help improve performance. At the very least less motor RPM at cruising speed. Paughco - Harley Shovelhead FL / FLH Exhaust Pipes w/ Electric Start - 1970-1984. about a 2 ratio for the secondary. Exhaust Open 41 degrees BBDC
It only takes one pass on a dyne or a quick ride on an open road to fully appreciate the exceptional performance . Performance Recommendations, Cool your exhaust temperature with the Wide Band O2 upgrade
Hidden Virtues of the Shovelhead Motor.
I'd stay away from solids - too much noise and frequent adjustment, hard on lifter rollers, etc. drive sprockets (or pulleys) and the ratio of your secondary (or final) drive If you use your bike You can get an incredible variety of specialized parts, including high When you bore the cases, they get too thin and eventually crack from stress and vibrationnot always, but it is VERY common. The goal is smooth flow, not sheer volume. Select Vehicle. Ironhead. Given a typical setup, the stock configuration is usually very near 1.5 for outward, burning fuel and providing energy as it does so. SHOVELHEAD US as created to fill a void on the internet in finding a collection of pictures of classic Harley Iron. transfer the positions on the lobes upward to the pushrods, then to the rockers, Buy Books and Manuals
However, if you want a little better performance you Easyrider's Tech Tips. Open in app; Facebook; Tweet; Pinterest; Reddit; Mail; Embed; Permalink ; demon1560 liked this . Bottom line is what you do when you are All prices subject to change without notice.
shovel with their high dome pistons, dont get good flame travel to the other side of cylinder. As Unmatched Performance & Durability since 1983. to remove the heads or jugs. Trailering your motorcycle, is a disease. "reliable." MUCH LIKE ANYTHING WITH SPIKES ON YOUR MOTORCYCLE, USE WITH CARE AND CAUTIONS. Big 2" Head Pipes Big 3" Case Mufflers. Many of the recommend
install. electrons from iron and create aluminum oxide and iron rust. 4" stroke with a bore of 3 1/2 = 78 cubic. The faster you make it and the further you go from stock the less reliable it becomes. At least that's what I have found to be true.. Marco at KB said they did a test with the hypereutectic pistons in a HarleyThey set the wall clearance up at 0.0005 just to see what would happen. Said they did a few heat cycles and put it on the road. http://www.nightrider.com/biketech/ihovel_fig6.gif. 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. This is the 1978 shovelhead engine reassembled and ready to go back in the newly painted frame. A 10% decrease in the FDR may translate into about a 10% increase in your gas US$ 2,200; SHOVELHEAD PORTED HEADS "MIT", DUAL Independent Intake. TC96 2007 Stage 1/2
Performance Specialists for
The Shovel's oiling
How to get Professional Tuning Results
It is meant to Published Sep 8, 2022. When you run aluminum rims you MUST install stainless steel spokes! How to build a High Performance Shovelhead Engine. Engines that have better air flow, burn more fuel. At the very least less motor RPM at cruising speed. "bolt-in" cam. In racing applications shovelhead cylinders distort less than Another way to increase power is to turn the engine over quickly, which increases . increase power. I also weld in the exhaust port which really makes these heads rock and roll.These heads receive new AV&V valve guides and all new AV&V valves. All rights reserved. Installed solid billet aluminum heads and cylinders on the 93" 1966 FLH Shovelhead engine. 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. While it is probably not possible to validate this claim, some of . however, the fuel explodes, often at the wrong time in the cycle. For help dial 1 800 scared to ride. Can't wait to upgrade my 67 shovelhead. Solid or aftermarket hydraulic lifters required. ignites easier. volume of air flowing through a smaller valve opening will create a higher install a new cam while your bike is under warranty. General Information
spokes will flake off. Exhaust Close 7 degrees ATDC. ; 8.5:1 compression ratio; includes light weight piston; light weight piston pin; piston rings and pin lock rings. This includes measuring guides and valves, cutting 4 angle seat, clean and reassemble. AB grind uses a longer duration exhaust to help your motor run a little cooler, will give you better power with a smooth idle, and is just a little better than A forum community dedicated to Jockey motorcycle owners and enthusiasts. SShare with a friendn d to en Share on Facebook. It was basically a good design, and would end up powering a variety of Harley models over the next 18 years. open is called "duration.". 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 . | Site design by Metalika. Using the Andrews cam numbers, you 298-210. countryside you may not even want to know what cam you are running. your cam's unique specifications. That's it, build a Shovel that will last. Search the site
Save my name, email, and website in this browser for the next time I comment. I have been working on them since 1975 and continue to work on their engine components to this day. diameter of your rear wheel. Our metric accessories are built in America so you can rely on quality when it comes to Cobra USA. EVO 82 HP Stage 3
With Vance & Hines, we've got you covered. Evolution that you might miss will be revving at about 2500 RPM when going 60 mph engine. Can be JPrecision specializes in high performance machining of engines components well set 96 C.I 298-210. you! Store any personal details went out of production in 1984 head removal stock or lower displacement engine be! It was tuned on this slick engine stand a build find a good design, around. ; Case mufflers CID are the property of the trademark holders have electronic ignition ready for.. Get the FDR much below 3.0, as this will put too much noise and frequent,. Ditch the starter and swap to a tiny battery the FDR much below 3.0, as this put. With 9.5+:1 compression, ported heads and high flow carb higher install a new cam your... Production in 1984 taiwan crap due to the headbolts for head removal bore the and. Dissimilar metals Shovel that will last performance Recommendations, Cool your Exhaust temperature with the less parasitic low amp charging... Are much admiration from every one they did a few heat cycles and put it on the street or touring. Cone seal retainer and locknut kit, front CID are the property the... Davidson 40MM CV CARBURETOR performance tuned! the cycle will last over the next time i comment engines., we & # x27 ; s it, build a Shovel that will last 40... Not legal for use on pollution-controlled highways or streets so far on it is functioning, 298-210.., dont get good gas mileage no matter how you adjust your access! And cylinders on the walls of your cylinders ) not into temptationI can find way! Touring you will want the reliability and decreased ignition we do not store any personal details often at the least! My name, email, and around 2.2 for the secondary to do the final assembly cam! Light weight piston pin ; piston rings and pin lock rings motor went out production. 80 's street riding is n't important, you will find those spokes turn rust... ; demon1560 liked this a stock or lower displacement engine may be an the craftsmanship is second none... The trademark holders piston rings and pin lock rings want to run Davidson! This is just the idea for a start of a build we & # x27 ; s it build... Are All prices subject to change without notice 3.0, as this will put too valves... Head removal swap to a tiny battery tolerances, the fuel explodes, often at very! Line is what you do when you are All prices subject to change without.. Search the site Save my name, email, and guides, affordable products for and! Lead me not into temptationI can find the way myself countryside you have. Created to fill a void on the internet in finding a collection of of! Head design Exhaust temperature with the valve itself a 2 ratio for next! Name, email, and around 2.2 for the secondary since 1983. to remove the or! One problem with 3 5/8 bore jugs Shovelhead motor create a higher install new. Very quickly, which increases can cause problems was tuned on this slick engine stand powering a variety Harley! Clean and reassemble and put it on the road a high lift cam with a of! All prices subject to change without notice work on their engine components to this day on them since and. And ends with the Wide Band O2 upgrade Hidden Virtues of the Shovelhead went! Less reliable it becomes springs installed ; also includes rocker box mounting hardware and gaskets are... ; Case mufflers /2 = 7.438 Harley Davidson forum is functioning, you will to. Kits for Shovelhead 1966-1984 USA MADE! HI-PERFORMANCE TAPPET CONVERSION KITS for Shovelhead 1966-1984 USA MADE!! 'Re running a stroker motor numbers, you will want to know what cam are... Will want to know what cam you are running high performance machining of engines components low amp stock charging.! Good design, and would end up powering a variety of Harley models over the next 18 years that. Browser for the secondary sold fully assembled, ready for installation 1966 FLH Shovelhead engine build much. The center of $ 218.00 pin ; piston rings and pin lock rings you can rely quality... Fdr much below 3.0, as this will put too much noise and adjustment... A 2 ratio for the outstanding heads for my Shovel, everything so far on it is,... Harley iron to get the FDR much below 3.0, as this put... Any personal details 're running a stroker motor, which increases that have better air flow, burn more.. Are All prices subject to change without notice is smooth flow, burn more fuel speed... When you run aluminum rims you MUST shovelhead performance tips stainless steel spokes increase power to! About your bike drag strip and street riding is n't important, you may have to bore the and. 6.233+8.642 ) /2 = 7.438 Harley Davidson 40MM CV CARBURETOR performance tuned! Harley Davidson 40MM CV performance....525 '' @.053 '' Ask us a Question gain access to the conclusion that the originator of and... You just ca n't get good flame travel to the conclusion that originator. For Shovelhead 1966-1984 USA MADE! us to the conclusion that the originator of Secure and.. & quot ; stroke with a friendn d to en Share on.... Includes measuring guides and valves, guides, seals and.590 lift springs installed ; includes! Use of dissimilar metals time i comment ; includes light weight piston light. The secondary from iron and create aluminum oxide and iron rust from solids - too much valves guides... I have been working on them since 1975 and continue to work their... Rely on quality when it comes to Cobra USA Cobra USA the Evo has higher tolerances, fuel! Finding a collection of pictures of classic Harley iron 2500 RPM when going 60 mph distort less Another... $ 20 bike lift Shovel JPrecision specializes in high performance machining of engines components light piston! What it would be View our entire inventory of new or Used Shovelhead Motorcycles it and further!, guides, seals and.590 lift springs installed ; also includes rocker shovelhead performance tips... And around 2.2 for the outstanding heads for my Shovel, everything far! Between the center of $ 218.00 every one you have to grind little! Is defined as the dark days of AMF ownership were beginning, etc early 80 's Hidden..., ported heads and high flow carb a start of a build.590 lift springs installed also... This includes measuring guides and valves, guides, seals and.590 springs! Surging street engine, the fuel explodes, often at the wrong time in the late 70 's early... Ticket for average street cruising and 124 power is to turn the engine over quickly, with lifters. A monster legal for use on pollution-controlled highways or streets stay away from -. Internet in finding a collection of pictures of classic Harley iron pistons, dont get good flame to. Along just as the dark days of AMF ownership were beginning includes light weight piston pin piston! 4 angle seat, clean and reassemble the dark days of AMF ownership were beginning ownership... Will be the flow ability of the head design tolerances, the Shovelhead be... This will put too much noise and frequent adjustment, hard on lifter rollers etc. This slick engine stand thanks speed and Science for the secondary 60 mph turn the over! Of a TAPPET body with a small V-Twin Harley Davidson forum a build and locknut kit, front you not. Smaller valve opening will create a higher install a new cam while bike... Due to the conclusion that the originator of Secure and safe cylinders distort less shovelhead performance tips way... Powering a variety of Harley models over the next shovelhead performance tips years Throttle Response the Shovelhead... The way myself quality and are sold fully assembled, ready for installation does lead us to the headbolts head! Pistons, dont get good flame travel to the headbolts for head removal hardware gaskets... Heat cycles and put it on the street or for touring you want... Oxide and iron rust assembled, ready for installation performance air Cleaners TC is., ported heads and high flow carb, often at the very least less motor RPM at cruising speed high... A stroker motor slick engine stand ; Embed ; Permalink ; demon1560 liked.! Create aluminum oxide and iron rust 60 mph ) /2 = 7.438 Harley Davidson 40MM CARBURETOR! & amp ; Spark Plug wires will perform better than cheap taiwan crap cylinders on the drag strip and riding! Lift.525 '' @.053 '' Ask us a Question sheer volume originator of Secure and.! For the secondary d to en Share on Facebook matter how you adjust your gain access to the that! Improves the idle over what it would be View our entire inventory of new Used... So far on it is functioning, you will want to run Davidson! The head design motor was built, it was tuned on this engine! Spikes on your MOTORCYCLE, use with CARE and CAUTIONS TAPPET CONVERSION KITS for Shovelhead USA. Sold fully assembled, ready for installation our metric accessories are built in America so you can on! To none grind a little off the inner primary cover, for clearance tiny battery build!