Bottom end / connecting rod limits
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Intermediate
Joined: Oct 2013
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From: Clovis
Bottom end / connecting rod limits
I have a question for anyone who has a lot of experience with the bottom ends of the twin cams. I have a 06 dyna that I am having Scott at hillside do a build on. I was going to have the stock 88 crank welded and figured sense I'm doing that I can spend 600 and get the 07 and up flywheel to make it a 107 and have it welded I should be good right??? Well I called and spoke to a reputable crank shop (super nice and very helpful) and was told the big issue is the connecting rods and to upgrade those before anything heres my options.
#1 I'm looking at 580 for the stock 96 crank and 200 to weld it total 800$
#2 580 for stock crank 400 for the rod upgrade + balance and 200 to weld 1200
#3 s&s with "big end rods" welded 1300
#4 cvo crank and have it welded 1000 for the crank and 200 for the weld 1200
but the question is is it neccesary I plan on making in the 125hp range I want it to be reliable but I don't have money to burn thank you very much in advance
#1 I'm looking at 580 for the stock 96 crank and 200 to weld it total 800$
#2 580 for stock crank 400 for the rod upgrade + balance and 200 to weld 1200
#3 s&s with "big end rods" welded 1300
#4 cvo crank and have it welded 1000 for the crank and 200 for the weld 1200
but the question is is it neccesary I plan on making in the 125hp range I want it to be reliable but I don't have money to burn thank you very much in advance
Last edited by Chaddilac; Feb 18, 2014 at 06:07 PM. Reason: Cleaned it up out of respect for my elders
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From: South Carolina
A snotty post like that will can leave you in the dark.
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From: Clovis
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HDF Community Team
Joined: Jun 2006
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From: san antonio
If Scott is building the motor, put the question to him; he can advise the most cost effective way to get to 107". No reflection on Scott but it's a push to make 125HP with 107" but if you can hit that number, you should definitely address the crank.
Road Captain
Joined: Mar 2006
Posts: 741
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From: West Central WI
The 06 dyna should have the rods with the full small end bushing and not the tapered rods, at least my own and one other I did had the full rods. If you are going to build a 107 then the SE crank is actually a very nice unit as well as the press together R&R units, they have a dynamic balancing system that is second to none if you plan on doing a balance job as well. S&S would be at the bottom of my list for crankshafts.