....because you shortened the effective tuned length of the pipe by the length of the silencer and whatever part of the stinger it was attached to.britincali wrote:And why on my AF (when the silencer fall of) did the bottom end all but dissapear but it would scream its ass off on top end?
Shortened silencer
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redrocket190
- Posts: 1229
- Joined: September 17th, 2007, 9:07 pm
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- Location: San Clemente, CA
Michael Stiles
2007 Honda CR500R-AF
2007 Honda CR500R-AF
All work in tuning the power band is done in the expansion chamber, the diameter and length all have seperate effects. The muffler does just that, muffle sound, at a SLIGHT expense in power. That is why you dont find them on dedicated drag race machines.
Bigger diameter of the chamber broadens the "hit" but reduces the peak and low end torque. A smaller diameter reduces the scavenging effect but has a better port blocking which is good for torque and fuel economy (increases dynamic comp ratio). This is why the stock pipe on a cr500 works so well.
Bigger diameter of the chamber broadens the "hit" but reduces the peak and low end torque. A smaller diameter reduces the scavenging effect but has a better port blocking which is good for torque and fuel economy (increases dynamic comp ratio). This is why the stock pipe on a cr500 works so well.
Faster then Speedy Gonzalez, slower then the Road Runner!!! MEEP MEEP
2002 CR80
1999 Cr500
2003 CR250R
2005 CRF250R
2006 YZ450F
2005 CBR1000RR
1997 Banshee
2002 CR80
1999 Cr500
2003 CR250R
2005 CRF250R
2006 YZ450F
2005 CBR1000RR
1997 Banshee