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View Full Version : New noise boat law, what brand are you considering?



riverbum
11-21-2004, 06:23 PM
As the new boat law is approaching, what brand mufflers are you considering?
I have looked into Gatlin, Rex Marine and GGB.

THOR
11-21-2004, 06:24 PM
I still dont know if I should change over. I have a 496 HO that idles below the water line and it quiet. It obviously gets louder while running. But, should I take a chance or no? If so, I will go with Rex or HPI.

MRS FLYIN VEE
11-21-2004, 06:25 PM
we can not find any that fit our boat :( :cry: :mad:

jbtrailerjim
11-21-2004, 06:28 PM
Mine exits under the water line. So, I will take my chances with how loud it is while I'm on plane. Hope they don't bother with me. If they do, I will probably go with the Rex mufflers. But damnnnn...... they are pricey.

RP1
11-21-2004, 06:30 PM
I still dont know if I should change over. I have a 496 HO that idles below the water line and it quiet. It obviously gets louder while running. But, should I take a chance or no? If so, I will go with Rex or HPI.
I wonder how the law reads... while in motion it will be difficult for them to guage your noise level. If so, I'm in the same situation as you :cry:

riverbum
11-21-2004, 06:36 PM
I still dont know if I should change over. I have a 496 HO that idles below the water line and it quiet. It obviously gets louder while running. But, should I take a chance or no? If so, I will go with Rex or HPI.
I have not heard of HPI. Do you know how they all compare?

Duck
11-21-2004, 06:36 PM
Have a set of Gatlins on the floor waiting for dull winter day to change. On the Daytona the bottom of the tips are just above the water. Like the look. ;)

CrazyHippy
11-21-2004, 06:41 PM
None :crossx:
Mercury 2.5... :boxed: :cool: :p
BJH

riverbum
11-21-2004, 06:47 PM
Have a set of Gatlins on the floor waiting for dull winter day to change. On the Daytona the bottom of the tips are just above the water. Like the look. ;)
I have seen Gatlins on a cat and liked the look also. I have been told on a new boat install Gatlin is the way to go.

Kim Hanson
11-21-2004, 06:48 PM
won't be long before they go after you guys :mad:
Im loud already, still haven't bothered me...yet! Ohh ya, this is Canada :wink: .........( . )( . )..............

Mrs CP 19
11-21-2004, 06:58 PM
delete the existing SAE J34 procedure for measuring recreational motorboat noise,
establish, for recreational vessel engines manufactured before January 1, 1993, a maximum noise level of 90 dB(A) when subjected to a stationary sound level test conducted in accordance with SAE standard SAE J2005,
establish, for recreational vessel engines manufactured on or after January 1, 1993, a maximum noise level of 88 dB(A) when subjected to a stationary sound level test conducted in accordance with SAE standard SAE J2005,
establish, for recreational vessel engines, a maximum noise level of 75 dB(A) measured as specified by SAE J1970, a shoreline sound level measurement procedure.
allow the aforementioned motorboat noise provisions to be operative within coastal waters, which are presently excluded.

burtandnancy
11-21-2004, 07:00 PM
Boat cop and Two hours left each have threads listed from the end of last week. In the near future there is going to be a lot on this subject. Also, someone wrote about some muffler tests being done at LHC in the next week or so. We're all going to be getting some information to help us decide how to go...

CJ
11-21-2004, 07:03 PM
Getting the 525EFI. Anyone have luck with those?
Eliminator has a pile of pipes that they will be testing over the next few weeks. They said they would install something until they find the perfect application, then swap it out. If I hear anything, I'll report back.
Sucks that we have deal with this now.

Kilrtoy
11-21-2004, 07:05 PM
Mine is water line also and not loud at all until on plane and its for sale.....

THOR
11-21-2004, 07:45 PM
I have not heard of HPI. Do you know how they all compare?
I dont know of any torque or HP curves, but Ultra uses them on their new one. Call them for the 411

Tinkerer
11-21-2004, 07:54 PM
I have silent choice but with 670 HP NA motors running almost dry headers I don't think that I would pass the test in silent mode.
This boat wakes the dead in open mode. :D

diggler
11-21-2004, 07:56 PM
I was ticketed for a noise violation this past July. (I have OT headers). I just had to install baffles, and then the ticket was dismissed. Would I pass it with baffles? not sure... but at least I've installed them.

GlastronGuy
11-21-2004, 07:58 PM
None

572Daytona
11-21-2004, 10:05 PM
Here's HPI's website, I bought a pair of their clampons off of Ebay to try next season.
http://www.hpisilencers.com/

Jerrys59
11-22-2004, 04:27 AM
Anyone know anything about these ? GGB Exhaust Tech.

NOTALENT
11-22-2004, 06:58 AM
are they only ticketing at the launch ramps?? or will they get u on the lake as well?? My buddie has his own launch ramp on the Ca side, that I can launch at.

Havasu_Dreamin
11-22-2004, 07:07 AM
As the new boat law is approaching, what brand mufflers are you considering?
I have looked into Gatlin, Rex Marine and GGB.
Rex Marine Power silencers, only way to go IMHO. They work, that is they meet the new CA law which is WAY more restrictive than the AZ law, and they look good as well. Some of the mufflers out there look like beer can's with the ends cut off and then clamped on. :yuk: A lso, no loss of HP or speed with the Rex Marine Power Silencers.

Havasu_Dreamin
11-22-2004, 07:09 AM
I wonder how the law reads... while in motion it will be difficult for them to guage your noise level. If so, I'm in the same situation as you :cry:
There is a "drive-by test" part of the law as well. But it appears to be very difficult to administer requiring a set course and multiple passes at WOT and the like. Kind of difficult to do out in the middle of the lake.

Essex502
11-22-2004, 07:09 AM
me to,i have a hp500efi and headers but not that loud @idel,so?we will see whhat happens ,if i have to ,rex
Mark...trust me...you're not quiet enough to pass the California test unless your exhaust exits below the water at idle. Buy the Rex Marine. They worked on a HP525 which is louder than your HP500.

Havasu_Dreamin
11-22-2004, 07:10 AM
Getting the 525EFI. Anyone have luck with those?
We have the same motor and the Rex Marine Power Silencers brought us to the legal limit per the CA law.

OGShocker
11-22-2004, 07:11 AM
As the new boat law is approaching, what brand mufflers are you considering?
I have looked into Gatlin, Rex Marine and GGB.
Rex.!.

Essex502
11-22-2004, 07:12 AM
I wonder how the law reads... while in motion it will be difficult for them to guage your noise level. If so, I'm in the same situation as you :cry:
California has two tests in effect for 2005....the J2005 stationary test measured 39" off your transom where you must be 88 dB(A) or less. Also the J1970 test which is a moving test where 75 dB(A) 50' away.
Arizona is 86 db(A) 50' away at any throttle position.
The Lake Havasu Marina "law" (snicker) is 86 dB(A) three big steps or 10' which ever is less accurate - away from the boat.

Essex502
11-22-2004, 07:13 AM
Getting the 525EFI. Anyone have luck with those?
Eliminator has a pile of pipes that they will be testing over the next few weeks. They said they would install something until they find the perfect application, then swap it out. If I hear anything, I'll report back.
Sucks that we have deal with this now.
CJ - Rex on the HP525 with an Essex Alandra "blew" 87.9 dB(A) under the California J2005 test procedure.

Essex502
11-22-2004, 07:15 AM
are they only ticketing at the launch ramps?? or will they get u on the lake as well?? My buddie has his own launch ramp on the Ca side, that I can launch at.
Under the California law you can be ticketed anywhere including within 3 miles of the shoreline on the ocean.

Tequila-John
11-22-2004, 07:21 AM
I think DANA carries an insert that helps bring the noise level down. I can get the info if needed..

NOTALENT
11-22-2004, 07:53 AM
Under the California law you can be ticketed anywhere including within 3 miles of the shoreline on the ocean.
His private launch is at Havasu...I should have clairfied that. Is this the same??

dirty old man
11-22-2004, 08:21 AM
good to know about the rex mufflers, my dealer at lake mead handles them

Cas
11-22-2004, 08:27 AM
I took the OT's off and went with TT Bassett headers. I also made my own baffles that insert into the tips. I just went down to the local muffler shop and had him flare both ends of some 3" pipe just enough so they would slip tightly into the tips. I then drilled 15 holes around each flared end and then tacked welded them in place.
With the water dumps being in the collectors and with these "baffles' disrupting the water flow just enough, it idles well below the legal limit (83 db).
I started my own little R&D back in July so I could do the testing in the warmth of summer :)
My thoughts are I'm not losing any performance, actually gained with the change. Went from logs and OT's to headers and baffles....works for me.

Whipped Caliber
11-22-2004, 09:23 AM
Anyone know anything about these ? GGB Exhaust Tech.
I'm running the GGB, put them on a 565 Q-Rotor 1.021 hp.
http://www.irnoyfb.com/wc/dr3.jpg
Great so far!! Sleeper :jawdrop:

OutCole'd
11-22-2004, 10:15 AM
I'm running the GGB, put them on a 565 Q-Rotor 1.021 hp.
http://www.irnoyfb.com/wc/dr3.jpg
Great so far!! Sleeper :jawdrop:
Are those clamp on?

Essex502
11-22-2004, 10:30 AM
His private launch is at Havasu...I should have clairfied that. Is this the same??
The launch isn't the issue. The noise laws of California apply to the whole of Lake Havasu as do the Laws of Arizona. The LE of either state can cite a loud boat anywhere on the lake or Colorado River.

Whipped Caliber
11-22-2004, 11:30 AM
Are those clamp on?
Yes :)

OutCole'd
11-22-2004, 11:54 AM
Yes :)
Gotta link??

jackpunx
11-22-2004, 01:33 PM
Mark,
are those working?..

Rexone
11-22-2004, 01:43 PM
Also the J1970 test which is a moving test where 75 dB(A) 50' away.
Arizona is 86 db(A) 50' away at any throttle position.
Actually the J1970 test (CA) can be any distance (shoreline test is what they call it but it can be administered from a platform {boat} as well) closer or further than 50' (distance is not specified). This was done to make the test easier to administer (exact 50' measurement is pretty tough to achieve in the field).
The J34 test (present test till Jan) is the one with the 50' measurement attached.
Don't confuse any of the above with J2005 (dock test) which is a separate test. LE in Ca as of Jan 1 will have the latitude of using either or both J1970 and J2005 test standards. AZ remains as it has always been.

Mrs CP 19
11-22-2004, 08:28 PM
All the manufacturers are scrambling to get thier muffling systems done due to the testing coming up. I heard it was originally set for 1 day, now due to overwhelming interest and new muffling device, the tests should take 2 days. HB will get everyone the info they need. Jill

77charger
11-22-2004, 08:32 PM
I plan on sticking with my thru hub exhaust seems to be very quiet ;)

Mrs CP 19
11-22-2004, 08:34 PM
We had used 2 different types of muffling devices on our BBC OT headers, before we went to Twin turbo (which is very quiet). We lost 300 or so on RPM, and a lot on performance. Hopefully this issue will be addressed in the test procedure. We used a set of Bassetts which were the best at muffling and less HP loss.

cyclone
12-06-2004, 04:36 PM
Pick up the March issue of Hot Boat for all the info on the new law and testing of 20-plus clamp-on mufflers.

unleashed
12-06-2004, 05:34 PM
How are the GGB clampons?? I need some input on these from anyone. I have a gift certificate for a pair.
Thanks
Deano
Unleashedclothing (http://www.unleashedclothing.com) :devil: