Building an 89" Stroker
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Intermediate
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Building an 89" Stroker
So I just found out that my front rod bearing is laying down. So since I have to go that far into the engine, I figured that I'd go with some S&S wheels.
The question that I have is what kind of cam would be a good idea to get with it.
I have an 89 FLHTCU. Has a super e carb, V&H pro pipe, and single fire ignition. The pistons will be the S&S 9.25:1 pistons.
The EV13 is supposed to be a good cam for a bagger but my buddy suggested the EV51. Even thought about the S&S 510V.But given what I have now, and the direction that I am going, I'm not sure which direction to go. The EV51 does sound like a good time when I'm in "spirited" riding mode.
Kinda looking for people who built 89" strokers in baggers and how they like where the torque comes in at.
The question that I have is what kind of cam would be a good idea to get with it.
I have an 89 FLHTCU. Has a super e carb, V&H pro pipe, and single fire ignition. The pistons will be the S&S 9.25:1 pistons.
The EV13 is supposed to be a good cam for a bagger but my buddy suggested the EV51. Even thought about the S&S 510V.But given what I have now, and the direction that I am going, I'm not sure which direction to go. The EV51 does sound like a good time when I'm in "spirited" riding mode.
Kinda looking for people who built 89" strokers in baggers and how they like where the torque comes in at.
Last edited by ElectraRoadKing; May 15, 2016 at 11:24 PM.
Club Member
Joined: Jun 2007
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From: Bedford UK
I can't claim to have built mine, I got a local indy to do it. He used JIMS parts, KB pistons of around 10:1 and a Crane cam, although I don't recall which one, also ported the heads. You will also need a different ignition system, to provide a suitable advance profile and again mine was Crane. I say 'was' as I have moved on, to an S&S 107"!
If you are going to have your crankshaft built for you then ask for suggestions of cams, ignition etc. Things have moved along a lot since I did mine and there are tuning parts available today that weren't around back then. Also consider having your heads ported, to get the best of your build. It's only money....
If you are going to have your crankshaft built for you then ask for suggestions of cams, ignition etc. Things have moved along a lot since I did mine and there are tuning parts available today that weren't around back then. Also consider having your heads ported, to get the best of your build. It's only money....
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So I just found out that my front rod bearing is laying down. So since I have to go that far into the engine, I figured that I'd go with some S&S wheels.
The question that I have is what kind of cam would be a good idea to get with it.
I have an 89 FLHTCU. Has a super e carb, V&H pro pipe, and single fire ignition. The pistons will be the S&S 9.25:1 pistons.
The EV13 is supposed to be a good cam for a bagger but my buddy suggested the EV51. Even thought about the S&S 510V.But given what I have now, and the direction that I am going, I'm not sure which direction to go. The EV51 does sound like a good time when I'm in "spirited" riding mode.
Kinda looking for people who built 89" strokers in baggers and how they like where the torque comes in at.
The question that I have is what kind of cam would be a good idea to get with it.
I have an 89 FLHTCU. Has a super e carb, V&H pro pipe, and single fire ignition. The pistons will be the S&S 9.25:1 pistons.
The EV13 is supposed to be a good cam for a bagger but my buddy suggested the EV51. Even thought about the S&S 510V.But given what I have now, and the direction that I am going, I'm not sure which direction to go. The EV51 does sound like a good time when I'm in "spirited" riding mode.
Kinda looking for people who built 89" strokers in baggers and how they like where the torque comes in at.
Built many like that, some with over 20 years in service.
Scott
Stellar HDF Member
Joined: Nov 2007
Posts: 2,121
Likes: 300
From: New Mexico-No, you don't need a passport.
I have an Ultima 89" stroker kit with a Crane cam, heads ported to match an Edelbrock manifold with a Super G in my 95 FLHT. I am getting 80 and 80.
Most of my riding is above 5000 feet.
What else should I do to see 100/100?
Most of my riding is above 5000 feet.
What else should I do to see 100/100?
Road Master
Joined: Aug 2007
Posts: 942
Likes: 323
From: Grew up in Texas, moved to AZ
If you build out to an 89 cubic, do you need to look at other components on a 1989 EG, such as clutch, tranny etc...?
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,079
Likes: 2,151
From: Ohio
Your EV51 has 256 and 252 duration with 44 intake, it will be a marshmellow down low with the compression you mentioned, not ideal for a big bike, will need to get to 3500 before giddy up comes in. The 4 5/8 stroker kit takes a flat top piston that puts it around 9.75-1 so a dome piston isn't going to work on the street because it will be in the 11-1 range, plug in the Big Boyz compression calculator to check desired compression, it is really important for cam selection
If you do some head work with springs the W6H will work, if no head work with stock springs the Comp Cams 3010 is easy on the valve trane, W6 or EV27 is badazz but will need some detailed lifter adjustment, personally think the EV13 will hit hard with the 4 5/8 flywheel but shoot it's wad early and not let the stroker work thru the midrange
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Seasoned HDF Member
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From: Ohio
Extra plate clutch will help and a stock 5 speed will work fine.
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Thread Starter
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Intermediate
Joined: Mar 2010
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Have ran this same combination for 6 years before going to big cubes, a solid set up that provides low power that will go deep into rpm's when called upon.
Your EV51 has 256 and 252 duration with 44 intake, it will be a marshmellow down low with the compression you mentioned, not ideal for a big bike, will need to get to 3500 before giddy up comes in. The 4 5/8 stroker kit takes a flat top piston that puts it around 9.75-1 so a dome piston isn't going to work on the street because it will be in the 11-1 range, plug in the Big Boyz compression calculator to check desired compression, it is really important for cam selection
If you do some head work with springs the W6H will work, if no head work with stock springs the Comp Cams 3010 is easy on the valve trane, W6 or EV27 is badazz but will need some detailed lifter adjustment, personally think the EV13 will hit hard with the 4 5/8 flywheel but shoot it's wad early and not let the stroker work thru the midrange
Your EV51 has 256 and 252 duration with 44 intake, it will be a marshmellow down low with the compression you mentioned, not ideal for a big bike, will need to get to 3500 before giddy up comes in. The 4 5/8 stroker kit takes a flat top piston that puts it around 9.75-1 so a dome piston isn't going to work on the street because it will be in the 11-1 range, plug in the Big Boyz compression calculator to check desired compression, it is really important for cam selection
If you do some head work with springs the W6H will work, if no head work with stock springs the Comp Cams 3010 is easy on the valve trane, W6 or EV27 is badazz but will need some detailed lifter adjustment, personally think the EV13 will hit hard with the 4 5/8 flywheel but shoot it's wad early and not let the stroker work thru the midrange
Also, it seems as though .510" lift is the limit with stock spring. Then you go with the beehive style springs, and then you have to cut reliefs into the head. At what point do you move from high lift springs alone to needing machine work done.
I wasn't planning on doing too much to my heads this round except for cleaning up the ports a little.
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,079
Likes: 2,151
From: Ohio
When I look online, I don't see much listed for 4 5/8" stroke in terms of piston selection. So that is the reasoning behind going with S&S pistons. The 10:1 ratio sounds more appealing to me. So if any of you know some specific part numbers, or who to call for that, I'd appreciate it.
Also, it seems as though .510" lift is the limit with stock spring. Then you go with the beehive style springs, and then you have to cut reliefs into the head. At what point do you move from high lift springs alone to needing machine work done.
I wasn't planning on doing too much to my heads this round except for cleaning up the ports a little.
Also, it seems as though .510" lift is the limit with stock spring. Then you go with the beehive style springs, and then you have to cut reliefs into the head. At what point do you move from high lift springs alone to needing machine work done.
I wasn't planning on doing too much to my heads this round except for cleaning up the ports a little.
Cast flat tops has been the only pistons available but I noticed some forged flat tops somewhere, not aware of domes so maybe you are ahead of me on pistons if you found domes listed. Still take a look at doing the heads for $600 and so many giddy up cams and flat tops can come into play that makes the 89" optimal