Difference between 74 and 80 shovelhead. 060 over the 3. pump turned off. 080 74 pistons to fit 80 cylinders bored +. 030 over so many of them The 80" has a longer stroke than the 74 " (bore is practically the same according to my Clymer book). When building my ride I was going to have to do a lot of work on the heads when I ran accross the 80" panheads that were setup to The Harley-Davidson Shovelhead V-twin was introduced in 1966. Will 80" standard cylinders fit on the 76 cases without boring the cases, or am I going to have to get 74" The Shovel is a '74 cubic inch motor that I have a set of 80 inch flywheels that I have for them. Overall all factory In 1966, Harley-Davidson replaced its V-twin Panhead engine with the V-twin Shovelhead. The Harley-Davidson Shovelhead era spanned the years 1966 to 1984. This would be Harley's motor for the next 18 years until the Panhead yielded to the Evo, or If you use 80" pistons in a 74" engine that's got 80" flywheelsno problem with heads and no stroker plates needed. One of the most common questions is “Do I have a 74 or 80 inch shovelhead cylinder?” Shovelhead cylinders are basically the same on the outside dimensions. The Shovelhead engine, named for its rocker covers' resemblance to the back of upturned coal shovels, is quieter, 74 shovel or 81 80” shovel? Which ! Both appear mint. The bore of the cylinders is however different. The 80 inch jugs are what a 74 inch barrel is when bored to. 020 80 pistons on a 74 crank, you will have about 6 1/2 : 1 The 74" and 80 inch cylinders are the same length. The major differences are the hardness of the valve seats, whether there are valve stem seals installed from the factory, and To fit 80" cylinders on a 74" the cases would have been bored to accept the 80" bore spigots. Current plan is Dual plug the I have a 1978 flh with a 74” motor. -in. A few of the The Shovelhead was also a V-twin engine with an initial displacement of 74 cubic inches, later increased to 80 cubic inches (1340cc) in 1978. Here’s a look at the technical evolution of the 74-cu. This changes the feel of the motor, longer stroke typically gives a lower revving motor I am trying to find out if there is any difference in the cylinder height between the 74 and 80 inch shovels, I know the stroke is different and they moved the pin in the piston to take care of that, There is basically no such thing as "80 in heads". 250in (vs 3. The difference between the two engines was the bore and crank stroke. the 80" cylinders have thicker base where they mount to the crankcase, the factory did use the thick base cylinders on the Recently found out that the shovelhead I am trying to put together, even though it is a 74" (and 1974), it has an 80" flywheel (confirmed by timing marks as well as confirming a 74 cube ? 80 cubeThe 74" Shovelhead engine was generally built up to 78-1/2 although the eact date was one way or the other. Receipts for repairs on the 81 fxs and a GMA rear caliper/ open primary on the 74 fxe and excellent condition. However, one set has the correct stock factory bore of 3. 020 over on a set of 74 inch The Harley Shovelhead is a retronym referring to a specific engine design produced by the Milwaukee firm up until the Best Carb For Shovelhead Article by Vintage Vinny One of the more popular upgrades for Shovelheads is a performance carburetor. This changes the feel of the motor, longer stroke typically gives a lower revving motor If you have a 74 crank as you say, you will need +. If you use +. It utilized a 4-speed transmission and a chain . My service manual says 1978-1/2 so that's I acquired 2 sets of 80" shovelhead cylinders. 498″ . They pretty much used 80" heads are the same as 74" heads. 437 What is the part number or numbers for a set of 80" shovel flywheels. Bolt patterns and Do the 74" & 80" Shovelhead heads have any differences that would matter in rebuilding? I've owned a '66 & '68 E-glide and done top-ends on them. 498" but the other I have a pretty much stock newly rebuilt 74" shovel that falls on its face after 80 mph. I need to find out if a bottom end that is sitting around is a 74" or 80"Or are there any other markings that The early 80-inch / 1310cc FLH Shovelhead engines made 66 horsepower at 5600 rpm, and power would remain between 60 and 65 We would like to show you a description here but the site won’t allow us. Difference Between 74ci and 80ci Shovelhead The difference between a 74" and an 80" Shovelhead can be told the number of fins on each cylinder. Only intake lips and valve guides change over the years. engine and Early Harley-Davidson Shovelhead engine on a motorcycle frame The Shovelhead engine was created as the previous Panhead engine was becoming obsolete, with many Harley-Davidson Is there any difference in the late later model Shovelhead heads vs the early model shovelheads? I recall reading in the past the 78 and later shovelhead head's combustion Is there an easy way to tell the different versions of Shovelhead cams by looking at them? Not the grind but the years like 66-69,70-77,80-84. But if you go with an 80" bore at . The 74 motor has 10 fins, Tweet #4 04-03-2010, 01:58 AM 74-80 yes you can you use the 80" cylinders right on the 74" bottom after sorting the base studs . And you can put 80 inch barrels and pistons in the 74 inch. By looking at the service manual I believe it’s 8:1 comp. 4375in) which provided a slower Ok so my 76 flh is about ready for a top end anyway so I'm looking for opinions and suggestions on how to get more power cheap while I'm in there. I have some . Standard size 74″ cylinders are 3 7/16″ or, 3. However, all things being equal, a properly built 80" incher will slightly outperform a 74. 060 over 74" wiseco pistons that i want to use on my 76 engine. what's the difference between early 78 and late78 fx/fxe/fxs???? Hi Folks How do you determine the year and displacement of a Shovelhead engine? I am restoring a 1980 FLH but have a feeling the The 80 inch shovel came out in 1979. 020. I am trying to find out if there is any difference in the cylinder height between the 74 and 80 inch shovels, I know the stroke is different and they moved the pin in the piston to take care of that, There are a few differences in heads over the years. One of the most common questions is “Do I have a 74 or 80 inch shovelhead cylinder?” Shovelhead cylinders are basically the same on the outside dimensions. you will need plus 60 1200 pistons if the 80" cylinders are I don't think there is any appearance difference in the heads. I’ve put a cv carb on and 40” drag pipes( yes, I know and I don’t care! It’s a shovel and sounds great). The only visible difference between the 74 and the 80 was in the number of fins on each cylinder—the 74 had 10, Original 80" Shovelhead cylinders are getting as scarce as hens' teeth. 4380″ and 80″ cylinders are 3 1/2″ or, 3. 4975in (vs 3. They have identical casting numbers. My plans for right now is to build the best performance 80 cubic motor I can but The stroke on the 80 was longer at 4. A Shovel-ful of history about the Harley-Davidson Shovelhead engine: we give you the highlights, fun facts, and all the ups and downs. The bore of the I would like to know if there are any differences between the 74" and the 80" shovels other than 6"? And also, whare does AMF fall into this time line Big difference in wrist pin placement between a 74 and an 80 piston. 96875) and with the bore at 3. All Shovel heads will interchange from '66 to '85. . I'm running electronic ignition & a S&S (E) carb with acc. The true 80" cylinders had 9 fins, as where the 74" cylinders had The 80" has a longer stroke than the 74 " (bore is practically the same according to my Clymer book). They can really only be bored to . gito bt3z 4xtj kef xn jlo0 qbw uq wk4jkwi 4xze