Warren
Kosikov 6/10/05:
Family
and Performance Boating
- Buckaroo Communications
Scope:
To install and test the
Gibson marine muffler on a high performance
boat that does not meet the new noise standard.
Gibson Bullet - Part
#110001
Test Boat:
Ron Porco owns this 1999
Carrera 257 Effect-X 26’ cat. Engine is
a 510 ci big block Chevy. Highly modified with
a supercharger. Estimated horse power is 825
HP. Top speed has been measured at 109 mph on
GPS.
Had
7” long stainless thru tips. Lightning
tubular headers. No flappers. (they keep blowing
out)
Test Location:
T & R Performance’s
Lake Havasu facility. On water testing, Lake
Havasu.
Test Procedure:
Used Calif J2005
Pic
# 1
Boat before installation.
7” long tips 4” in diameter.
Pic#
2
Side view, before install
Pic#
3
Cut stainless tips to
required 3” long. Only took one new blade.
Pic#
4
Cut tip using sawzall.
Pic#
5
Cut tip
Pic
# 6
File edges to remove burrs
Pic#
7
File edges
Pic#
8
Pre fit mufflers
Pic#
9
Pre fit mufflers
Pic#
10
Mufflers installed
Pic#
11 Mufflers installed
Pic#
12 Mufflers installed
– side view
Pic#
13
Gibson Bullet Muffler
Pic#
14
Mufflers installed on
the water
Pic#
15 Shot of sound
level meter before mufflers “110 db”
Pic#
16 Shot of sound
level meter after muffler install “89
db”
Pic
# 17 & 18 In-water shots
of complete installation. Flappers were added
before....
...testing began. Both
with and without
Conclusion:
The mufflers made a
huge difference in the sound of this boat.
It took the “bark” out of the
exhaust but still has a good high performance
sound to it. Top end performance may be affected
but we didn’t test for it. High speed
sound level was greatly reduced.
We
asked owner if it mattered to him that speed
may be reduced and his response was “
this boat has gone 109 mph, if it only goes
106 do I care – NO The mufflers stay”.
Comments:
Testing of the new spec
is very difficult. Trying to find the ideal
conditions proved to be a challenge, a lot
of uncontrollable variables. I really don’t
know how law enforcement is going to be able
to test on water and be fair.
<View
the actual Magazine Article.
Gibson
Performance Mufflers are in Compliance
with the New J2005 Sound Ordinance
PROUDLY
MADE IN THE U.S.A Gibson
Performance, Inc. "Mild
to Wild, Humble to Rumble"™ -
1270 Webb Circle, Corona, CA 92879 USA
(800) 528-3044 | (951) 372-1220 | FAX: (951) 372-1233 - 8:00 a.m.
- 5:00 p.m. PST
