Not So loud pipes

 Bike:  2006 Harley Davidson Street Glide (FLHXI) with Screamin' Eagle
103ci bore & stroke (Stage I) kit; cams, air box mods, race tuner,
etc.

(All measured four feet from the rear of the bike at 4 feet elevation)

Pipe:   Screamin' Eagle Race Pipes "for off road use only."

Idle:   86 dbA
Redline (6,300 rpm):  106 dbA

Pipe:  OEM CVO Harley Screamin' Eagle Electra Glide 1650 (103ci) EPA
compliant stock mufflers:

Idle: 79 dbA
Redline: 102dbA

It is AMAZING how much louder that small increase in measured decibels
makes!   I'm glad I have my quiet pipes back on, but I think most
people would consider the SE Race pipes to be "quiet" by aftermarket
Harley exhaust system standards.

 On Mon, 26 May 2008 17:37:41 -0700 (PDT), "tomorrow@erols.com"


I am surprised there is that much difference too.

I missed out on the HD Touring mufflers I was looking at, but after
this weekends ride I will be ordering a set new. I can't take the
Ovals.
  

--
See Ya On The Road


2000 Yamaha Venture Millennium
2004 HD Road King

 "tomorrow@erols.com" wrote:


They're logarithmic.  7 dB, the SPL difference between these pipes at
idle speed, is a power ratio of just a bit more than 5:1


========================================================================
          Michael Kesti            |  "And like, one and one don't make
                                   |   two, one and one make one."
    mrkesti at hotmail dot com     |          - The Who, Bargain

 In article


79 dB to 86 dB is 7 dB, more than four times as loud.
102 dB to 106 dB us 4 dB, more than twice as loud.

How far away did you measure this? In an open field or with buildings
around? What did you measure it with? Did you to an open-throttle  
ride-by test?

--
Timberwoof <me at timberwoof dot com>
faq:  http://www.timberwoof.com/motorcycle/faq.shtml

 wrote:

See quote, above.


open field


http://tinyurl.com/2bfsvt

Did you to an open-throttle  ride-by test?

no