Stroker crank and case borking question - Road Glide Forums
Engine Related Engine Builds and more for Road Glides

 3Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 19 (permalink) Old 01-12-2016, 02:40 PM Thread Starter
Member
 
BigNorm's Avatar
 
Join Date: Feb 2014
Location: Minden, NV
Posts: 420
Stroker crank and case borking question

What would the displacement be of a stock 103 with a S&S stroker crank? My guess is a 113. Is case boring necessary to fit a larger cylinder or for clearance for a larger crank? This is for my general knowledge. Thanks as always for your help.

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BigNorm is offline  
Sponsored Links
Advertisement
 
post #2 of 19 (permalink) Old 01-12-2016, 03:09 PM
Administrator
 
JacktheBagger's Avatar
 
Join Date: Apr 2010
Location: Bama
Posts: 9,568
Garage
Without boring , the 103 is a 4.375" stroke

a 4.500" stroke is a 106

a 4.625" stroke is a 109

boring to 4.00"

stock stroke is a 109

4.500" stroke is a 113

4.625 stroke is a 117

increasing one or the other .125" yields around 3 c.i.


JtB
BigNorm likes this.

So Many Highways So Little Time
2011 Ultra
JacktheBagger is offline  
post #3 of 19 (permalink) Old 01-12-2016, 03:27 PM Thread Starter
Member
 
BigNorm's Avatar
 
Join Date: Feb 2014
Location: Minden, NV
Posts: 420
Thanks. I just saw I wrote case borking. lol. Is the case boring needed to clear the new stroke?

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BigNorm is offline  
 
post #4 of 19 (permalink) Old 01-13-2016, 06:34 AM
Grey beard
 
Join Date: Oct 2011
Location: Munnsville,N.Y.
Posts: 1,432
With a 4.375" crank,(103") it is very common to bore the cases to
accept a 4 1/8" cylinder allowing 117" total swept volume to be established.
Longer stroke engines require the C/L of the wrist pin bore to move up into the ring pack, 1/2 the length of the total stroke increase, and can pose a problem as far as a piston being available.
Iron XL's with 4 5/8" stroke actually have an aluminum botton that rides in the end of the wrist pin, to support the oil control ring, as the wrist pin bore is well into the oil ring groove.
Not the greatest way to fly.
Wood's site shows a street-driven touring 4 3/8" X 4 1/8", 117" at 141/144 that we built yeeears ago.
Scott
Hillsidecycle.com is offline  
post #5 of 19 (permalink) Old 01-13-2016, 08:16 AM Thread Starter
Member
 
BigNorm's Avatar
 
Join Date: Feb 2014
Location: Minden, NV
Posts: 420
Since I have my current build figured finally I'm researching for when I have to rebuild. Hopefully not soon. It seems that the crank is the weak link so when rebuild time comes at 200k (lol) I can do a total rebuild. It looks like S&S is the way to go with a crank. I'll probably go with a 4.625 crank and have it welded for extra security. I like that you can just bolt on an extra 14 cubes but how much is too much before you compromise the crank shaft? I'm looking for usable torque not drag racing rpms. I appreciate everyone's help and advice here. I'm learning and I'm having fun with it.

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BigNorm is offline  
post #6 of 19 (permalink) Old 01-13-2016, 11:30 AM
Member
 
SMOKENJOE's Avatar
 
Join Date: Mar 2011
Location: Oregon/Arizonia
Posts: 339
If it was me i would sell the engine in the bike and put a S&S 124 in it just my thoughts


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
POLARIS SLINGSHOT VERY FAST Viet Nam Vet 1966/1967 HAD TO SELL 2010 ROAD GLIDE DUE TO BAD BACK
SMOKENJOE is offline  
post #7 of 19 (permalink) Old 01-13-2016, 12:01 PM Thread Starter
Member
 
BigNorm's Avatar
 
Join Date: Feb 2014
Location: Minden, NV
Posts: 420
Thanks Joe. That may be the direction I head in eventually. Right now I'm learning and seeing what works and what doesn't. I love to ride but I also like to know how the nuts and bolts go together. The whole process fascinates me. I haven't built a motorcycle engine yet but I have done a few V8s in my time. I can't wait to get my hands in there. Thanks again.

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BigNorm is offline  
post #8 of 19 (permalink) Old 01-13-2016, 12:37 PM
Member
 
SMOKENJOE's Avatar
 
Join Date: Mar 2011
Location: Oregon/Arizonia
Posts: 339
Good for you it is not as easy as you would think if you build one from the bottom up. It takes a full shop of equiptment like balancing the fly wheels one screw up there and the build goes up in smoke. I have been working on bikes from the 60s Indians/Harleys no Jap bikes and one thing I always had done by others was the fly wheels I never got the hang of static balancing or dynamic balancing I only do my own work now because I have nothing to do with my time. Good Luck


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
POLARIS SLINGSHOT VERY FAST Viet Nam Vet 1966/1967 HAD TO SELL 2010 ROAD GLIDE DUE TO BAD BACK
SMOKENJOE is offline  
post #9 of 19 (permalink) Old 01-13-2016, 01:41 PM Thread Starter
Member
 
BigNorm's Avatar
 
Join Date: Feb 2014
Location: Minden, NV
Posts: 420
I just like to do my own work because I like knowing what I put in there and it's therapy for me. Although all the obsessing I do prior to a build probably offsets the therapeutic value.

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BigNorm is offline  
post #10 of 19 (permalink) Old 01-14-2016, 05:00 AM
Grey beard
 
Join Date: Oct 2011
Location: Munnsville,N.Y.
Posts: 1,432
S&S cranks are the industry standard, and yes, your OE crank would need to be attended to prior to the advent of a 4 1/8" cylinder kit.
We pin/weld those here.
Scott
BigNorm likes this.
Hillsidecycle.com is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Road Glide Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Crank no start, crank start Sam07 Troubleshooting for Road Glides 10 05-15-2018 09:03 AM
big crank or mega crank battery Onthehunt49 General Off-Topic Discussions 7 04-10-2016 06:27 PM
Stock crank vs. S&S crank HDBAGR Engine Related 11 05-23-2015 04:21 PM
Quick Question On the Top 3 Crank Case Bolts! RGKen Do-IT-Yourself 7 03-10-2015 01:59 PM
Wtb 4 5/8 stroker crank buell95 Wanted! (Buy or Trade) 0 01-05-2013 07:39 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome