Needs torque advice
Extreme HDF Member
Joined: Apr 2006
Posts: 10,449
Likes: 46
From: Roswell, GA
It will raise your rpm's approx. 200 @ 70 mph.
Carl
Cruiser
Joined: May 2010
Posts: 126
Likes: 1
Yep...
...start with gearing. Drop two teeth up front, gain two teeth out back? I don't know what's the magic ratio number for you, but it looks like you've got reliable help with numbers already...it's all about belt fitment too(length and width) but you shouldn't have too much problem getting things sorted because everything should be bolt-on for you to wake her up. Try thinking like this with an '07 or later (cush drive) and life sucks out back (have made many telephone calls to get even close to a 70-tooth cush drive rear pulley that's 1" wide.)
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Road Warrior
Joined: Aug 2010
Posts: 1,788
Likes: 5
From: Tennessee
Thanks Craig. It sounds like you know what your talkin about. I have found a shop fairly close to home that i've been hearin a lot of good reports on. I think i'll let him dyno and tune it. He supposedly has the best dyno money can buy. Much better than the HD dealers. What about prober back pressure. I was told to loose the Rineharts that they were hurtin not helpin. Thanks again.
Road Master
Joined: Jun 2008
Posts: 868
Likes: 1
From: Trenton,N.J.
Thanks Craig. It sounds like you know what your talkin about. I have found a shop fairly close to home that i've been hearin a lot of good reports on. I think i'll let him dyno and tune it. He supposedly has the best dyno money can buy. Much better than the HD dealers. What about prober back pressure. I was told to loose the Rineharts that they were hurtin not helpin. Thanks again.
Road Master
Joined: Jun 2008
Posts: 868
Likes: 1
From: Trenton,N.J.
I respectfully disagree.It's not all the same.If you change cams,yes you could loose a few hp,you might gain in tq though.This is why headwork is so important,it can give you more & a better balance of both.The cam,headwork, & compression must be matched to optimize the performance.If at 3,000rpms my bike makes 100hp/100tq & your makes 80hp/80tq is that the same??
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Road Master
Joined: Jun 2008
Posts: 868
Likes: 1
From: Trenton,N.J.
You can change gearing,but in my opinion it's a cheap fix.I would want the motor right.As said before you can go down in the front,which is the same as adding to the rear.Do you really want to loose rpms on a motor that doesn't rev much anyway?? The twin cam motor is done making hp/tq at roughly 5,500.That's not much rpm's.
Last edited by arealinvestor; Sep 20, 2010 at 08:42 PM.
Advanced
Joined: Jul 2005
Posts: 96
Likes: 0
From: Chicago
Agreed!..A V&H pro pipe and about 3hrs with someone who is a real tuner..not a map tweeker...will help you a lot!