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88" Stock 03 Heads VS 06 Heads?

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Old Sep 27, 2011 | 07:16 PM
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Default 88" Stock 03 Heads VS 06 Heads?

Can someone tell me what the differance between the 88" Stock 03 and the 06 head. I heard that the 06 Heads have better flow out of the box VS the 03's. Then again I hear it doesnt matter if they are going to be ported!



03 ultra 88", S&S 510's, Fueling oil pump and cam cover,V02 naked intake, V&H 4" slip-ons
 
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Old Sep 27, 2011 | 07:21 PM
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I just put these heads on my bike last week. I have a 2002 twin cam with a 95" build and 203 cams. there is a noticeable difference with these3 heads without porting or anything. They take a better breather among other differences like better flow, beehive spings, etc.

Drew
 
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Old Sep 28, 2011 | 03:13 AM
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Originally Posted by Race freak
Can someone tell me what the differance between the 88" Stock 03 and the 06 head. I heard that the 06 Heads have better flow out of the box VS the 03's.
Probably more info on the subject than you want to know.
http://neverworld.net/socalnetscum/f...BStudyRel1.pdf

Originally Posted by Race freak
Then again I hear it doesnt matter if they are going to be ported!
In the hands of a good machine shop/porting service, '99 casting heads should flow better than 260 cfm @ 28" at .600 lift. So no, doesn't really matter.
 

Last edited by Weevil; Sep 28, 2011 at 03:20 AM.
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Old Sep 28, 2011 | 05:47 AM
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Originally Posted by Race freak
Can someone tell me what the differance between the 88" Stock 03 and the 06 head. I heard that the 06 Heads have better flow out of the box VS the 03's. Then again I hear it doesnt matter if they are going to be ported!



03 ultra 88", S&S 510's, Fueling oil pump and cam cover,V02 naked intake, V&H 4" slip-ons

They do, and it doesn't.
Scott
 
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