Question About 88 c.i. upgrade
Outstanding HDF Member
Joined: Nov 2009
Posts: 2,666
Likes: 133
From: TEXAS
Not to beat a dead horse here, but what is a good size cam if I stick with the 88 c.i. set up and try to get the most out of some quick back roads four lane highway action, and still be able to keep those cams when I upgrade up to 96 c.i.? I know it's hard to get the best of both worlds with compromise but will anything work?
These guys know way,way more about this than I will ever come close to knowing. My solution was to use Andrews 37 with a 4* advance sprocket on my stock 88 then when I bumped it up to 98" I could remove the advance and run it straight up . That was like 4 years ago and my bike is still 88". Still thinking about going 98", just haven't done it yet .
Not sure if that is a good option but it is what I did. Also I just planned on stayin with the tensioners.
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
These guys know way,way more about this than I will ever come close to knowing. My solution was to use Andrews 37 with a 4* advance sprocket on my stock 88 then when I bumped it up to 98" I could remove the advance and run it straight up . That was like 4 years ago and my bike is still 88". Still thinking about going 98", just haven't done it yet .
Not sure if that is a good option but it is what I did. Also I just planned on stayin with the tensioners.
Not sure if that is a good option but it is what I did. Also I just planned on stayin with the tensioners.
Outstanding HDF Member
Joined: Nov 2009
Posts: 2,666
Likes: 133
From: TEXAS
The 4* advance sprocket moved the 37 intake close from 38* to 34*; the 48 intake closes at 29*. The earlier intake close increases corrected CR and CCP which converts to more torque assuming all other factors are equal. Right now, your static CR is barely 9:1 but increasing to 98" and retaining the 4* advance sprocket, static CR will increase to about 9.6:1, corrected CR to about 9.1 and CCP to about 187, depending on sea level; removing the advance sprocket will result in not effect static but will reduce corrected CR and CCP. If you want to run the 37s in the 98" configuration, leaving the 4* advance sprocket would be a good idea. JMHO.
When I get ready to do it I will be seeking advice. Thinking about next February, that is the only month I don't mind not havin a bike while it is on the lift. As you know our winter here is usually about 2 weeks long.
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
Outstanding HDF Member
Joined: Nov 2009
Posts: 2,666
Likes: 133
From: TEXAS
I could start collecting parts I suppose , I will start s new thread cause I have lots of questions
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
Collecting parts is a good idea but you have to have the plan nailed down solid and once nailed down, don't be swayed from your path or you will end up spending money on parts you don't need. You can PM me anytime if you want to run things by me. If I don't know the answer, I will tell you so; I will never blow smoke up your a$$.
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Tourer
Joined: Jan 2010
Posts: 296
Likes: 4
i just made mine 98 ci and head work with andrews 57 same spec than 37 with higher lift hydro chain tensionner sm brother adj push rod cv carb port intake i.9 valve intake stock ex valve supertrapp supermeg 2 in 1 20 disc close end cap just 100 mi on it last year before winter really love it not dyno yet but this thing is smooth at low speed good manneer and rev fast fun to ride in my road king
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