Twin Cam Motors Twin Cam 1998 thru 2017

Stock vs billet cam plate

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  #11  
Old 12-06-2023, 04:13 AM
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Originally Posted by KK0G
I just want to say that is a sweet *** looking bike!
Thank you sir.
 
  #12  
Old 12-06-2023, 08:36 PM
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I've got a stock 2013 cam plate if you want it.
That said, if those lifters have .200 travel, I would reconsider your "within spec" to .140 if you want quiet.
 
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Old 12-07-2023, 02:04 AM
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Originally Posted by 60Gunner
I've got a stock 2013 cam plate if you want it.
That said, if those lifters have .200 travel, I would reconsider your "within spec" to .140 if you want quiet.
Thanks for the offer, let me get back to you on that. The thing keeping me from doing the conversion is the limited selection of that style cams, I have only seen Andrews, Wood and Feuling. Since my S&S heads have a quite low exhaust to intake flow ratio I think I will benefit from cams with a bit of bias to exhaust side, like S&S 570 or 585, the Feuling cams have that too but they seem to have quite a bad reputation, no one seems to like them.

When I still used adjustable push rods I tried preloads from 0.100" to 0.150" with absolutely no difference in noise. Going back to the stock push rods at around 0.095" made it clearly less noisy, its possible that the adjustable rods were hitting the tubes. but I could not see any witness marks on them. If I change cams and need a different length rod I will measure and then buy fixed rods of the right length.
 
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  #14  
Old 12-07-2023, 04:41 AM
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Make your own conversion cams it you like the S&S cams

Bearing races are available for the B-148 inner cam bearings. Bearings are standard bearings, not Harley specific. Cams can be machined to accept the races fit on to cams to make your own "conversion" cams. I had this done for me on a set of Dave Mackie cams. A good local machine shop should be able to do this for you
 
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  #15  
Old 12-07-2023, 06:56 AM
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Originally Posted by tdrglide
Make your own conversion cams it you like the S&S cams

Bearing races are available for the B-148 inner cam bearings. Bearings are standard bearings, not Harley specific. Cams can be machined to accept the races fit on to cams to make your own "conversion" cams. I had this done for me on a set of Dave Mackie cams. A good local machine shop should be able to do this for you
Thats a good idea, do you know where I could buy such bearing races?
 
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Old 12-07-2023, 08:14 AM
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I had this done years ago. IIRC, the machinist had to remove material from the inner cam journal to an OD that would allow the pressing of a bearing race onto the machined cam journal. Once the macinist knew what I wanted to do, he found the proper sized race for the job. This was years ago and IIRC, the cost at that time was about $300 USD. Since the plan is to have the cases machined for larger pistons, it might be cheaper to have the inner cam bearing bosses machined for larger bearings at that time.
 
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  #17  
Old 12-07-2023, 10:27 AM
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I believe they used inner ring IRA-10. A search found IRA-10 Koyo for about $15 ea.
I had HyperFormance in Pleasant Hill Iowa do it for me. About $160 for the pair. I just supplied them with the cams
 

Last edited by tdrglide; 12-07-2023 at 10:32 AM.
  #18  
Old 12-07-2023, 01:08 PM
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Originally Posted by tdrglide
I believe they used inner ring IRA-10. A search found IRA-10 Koyo for about $15 ea. I had HyperFormance in Pleasant Hill Iowa do it for me. About $160 for the pair. I just supplied them with the cams
Apparently, I paid too much.
 
  #19  
Old 12-07-2023, 08:37 PM
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Originally Posted by tdrglide
Make your own conversion cams it you like the S&S cams

Bearing races are available for the B-148 inner cam bearings. Bearings are standard bearings, not Harley specific. Cams can be machined to accept the races fit on to cams to make your own "conversion" cams. I had this done for me on a set of Dave Mackie cams. A good local machine shop should be able to do this for you
So you are saying that you took a set of early cams and increased the outboard race to fit a later cam plate?

Add:

Or are you saying use a late model cam plate and cam, then machine down the cam with a bigger journal to fit a sleeve then press on a hardened sleeve? Sounds like you are limited to having to do machine work for each cam. Personally I like the idea of machining the cases for the bigger bearing, especially since OP might like to try different cams and plans on machining the cases for 4 1/8 bore.
 

Last edited by Max Headflow; 12-07-2023 at 08:49 PM. Reason: add:
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Old 12-08-2023, 12:32 AM
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I used later style cam plate and chain drive cams and had the cams modified to fit earlier 99-06 cases.
Mackie did not offer early style chain drive for the 598 cams
Engine was already built and running gear drive cams but I wanted to switch to 07-up hydraulic chain drive cams. Hate to tear down an otherwise great running motor

But i do agree if buiding 99-06 new from cases up, best to just have cases machined to fit later style inner cam bearings. Have done that also

 
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