88 to a 103?
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Stage IV
Joined: Jul 2014
Posts: 4
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From: Michigan
88 to a 103?
I'm considering putting a 2013 103" twim-cam in my 2006 Electra Glide Standard. Does anybody know what else I'll have to change to make this work? Will the 103" motor bolt directly to my 5-speed transmission? Will I need to change the ECM?
Thanks in advance for any help anyone may be able to offer!
Thanks in advance for any help anyone may be able to offer!
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
I'm considering putting a 2013 103" twim-cam in my 2006 Electra Glide Standard. Does anybody know what else I'll have to change to make this work? Will the 103" motor bolt directly to my 5-speed transmission? Will I need to change the ECM?
Thanks in advance for any help anyone may be able to offer!
Thanks in advance for any help anyone may be able to offer!
Intermediate
Joined: Mar 2012
Posts: 28
Likes: 0
From: Michigan
To echo Scott, a bridge too far unless you have a lot of time, a lot of mechanical skills/tools and, most importantly, a big pile of cash. You should pass on that idea and consider working with what you have as Scott has suggested. A well built 98"er will out perform that 103"er anyway and it is something you can do and won't break the bank.
I should leave well enough alone, but I like mixing and matching parts.. it's a sickness.
What does it take to drop a 07+ 4.375 bottom end into my TC88? I hear the 99-02 cranks are "better", but if I true an weld a 07+ crank.... why not make a 103 or 107 with factory bottom end and bored jugs?
I build V8's regularly, so I have the tools/ability to do the work, I'm still learning the interchange ropes on V twins..
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
I should leave well enough alone, but I like mixing and matching parts.. it's a sickness.
What does it take to drop a 07+ 4.375 bottom end into my TC88? I hear the 99-02 cranks are "better", but if I true an weld a 07+ crank.... why not make a 103 or 107 with factory bottom end and bored jugs?
I build V8's regularly, so I have the tools/ability to do the work, I'm still learning the interchange ropes on V twins..
What does it take to drop a 07+ 4.375 bottom end into my TC88? I hear the 99-02 cranks are "better", but if I true an weld a 07+ crank.... why not make a 103 or 107 with factory bottom end and bored jugs?
I build V8's regularly, so I have the tools/ability to do the work, I'm still learning the interchange ropes on V twins..
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
I should leave well enough alone, but I like mixing and matching parts.. it's a sickness.
What does it take to drop a 07+ 4.375 bottom end into my TC88? I hear the 99-02 cranks are "better", but if I true an weld a 07+ crank.... why not make a 103 or 107 with factory bottom end and bored jugs?
I build V8's regularly, so I have the tools/ability to do the work, I'm still learning the interchange ropes on V twins..
What does it take to drop a 07+ 4.375 bottom end into my TC88? I hear the 99-02 cranks are "better", but if I true an weld a 07+ crank.... why not make a 103 or 107 with factory bottom end and bored jugs?
I build V8's regularly, so I have the tools/ability to do the work, I'm still learning the interchange ropes on V twins..
Tame, those push 125/135, and have built them well north of that.
Scott
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Intermediate
Joined: Mar 2012
Posts: 28
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From: Michigan
Does anybody have a definitive answer?
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HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
I thought I made it pretty clear in #6 that dropping a 4.375" crank (OEM or aftermarket) in your 88" cases, without machine work, was a "bolt in" exchange. However, it would be wise to convert the crank roller bearing to the Timken bearing or the HD "Lefty" bearing unless you have an '02 or earlier 88"er that already has the Timken crank bearing. However, once the lower unit is out of the bike for the crank conversion, that would be the time to bore the cases for larger cylinders so, in the future, if you wanted to install bigger bore cylinders, the lower unit would not have to be pulled again for case boring. Believe me, when I pulled the lower unit in my '02 FLHT for case boring for bigger bore cylinders, the additional cost for a 4.375" crank would have been marginal and I have always regretted not going to 117" instead of 107". Just saying that once the lower unit is out for a crank exchange, if funds are available, get the other machine work done for a future upgrade in displacement.
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