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 Exhaust power cones?
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Joined: Apr 2007
Posts: 467
Adjunct
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OP
Adjunct
Joined: Apr 2007
Posts: 467 |
I seen some I believe they are referred to as power cones in the Dennis Kirk Harley catalog.They go in the exhaust header right at the beginning where they come out of the cylinder head.Suppose to give more torque.Has anybody tried these in the our bikes and if so did they give it any power gains.I see them ranging in price from about $25 to $80.Seems like they might help.There catalog says they help on straight pipes to help give them alittle back pressure.Seems like it could be a lower cost mod if they actually help on our bikes. 
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Re: Exhaust power cones?
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Joined: Jul 2008
Posts: 1,440
Learned Hand
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Learned Hand
Joined: Jul 2008
Posts: 1,440 |
Might be useful if you're running shorty straight pipes. Even so, I don't like to see the restriction that close to the engine. I think these are being sold as a bandaid for the HD guy who bought straights cuz his buddy did. That sort of thing probably happens a lot in HD-ville.
Jack
'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy
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Re: Exhaust power cones?
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Joined: Sep 2006
Posts: 1,457
Learned Hand
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Learned Hand
Joined: Sep 2006
Posts: 1,457 |
The stock mufflers have reducers right at the front end. I took them out of a set of pipes and lost quite a bit of low end torque.
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Re: Exhaust power cones?
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Joined: Aug 2008
Posts: 1,048
Learned Hand
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Learned Hand
Joined: Aug 2008
Posts: 1,048 |
The cones are anti reversion cones. They keep the exhaust from backing up into the combustion chamber, and increase the velocity of the exhaust gases, helping in scavenging.
Clay
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