SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: iloveitloud on August 13, 2010, 04:31:05 PM

Title: Boat mufflers???
Post by: iloveitloud on August 13, 2010, 04:31:05 PM
My jetboat is the only one around here, and also the loudest boat around here by a long shot. I have had a number of complaints, and to be honest, it's to loud for me, and everyone in the boat too. It has the "log" type manifolds, with "snails", and then about 6" of hose to the exhaust tips. Is there anything that fits where the connecting hoses go, or actual tips with mufflers in them that I could fit in there?  The motor is out of the boat this week, so I can get at everything better now than ever, and I NEED to do something, because everyone on the lakes around me are getting really pissed!
Title: Re: Boat mufflers???
Post by: lbhsbz on August 13, 2010, 04:35:28 PM
Logs are about as quiet as it gets. 

Here's an idea...throw a set of dry headers on it for the weekend and run it around a bit, then put the logs back on.  By comparison, it'll be much quieter and they will thank you for your efforts.
Title: Re: Boat mufflers???
Post by: Marcsrollin on August 13, 2010, 04:58:57 PM
Sounds to me like you need to change your screen name! ;D
Title: Re: Boat mufflers???
Post by: GeneralLee on August 13, 2010, 05:12:59 PM
+1 ^^^^^^

Iloveitloud eh??? I dunno man screen name change is called for. Just busting chopps hehehe. Yeah from what I know snails is the the less obnoxious exhaust out there. You want quiet, get an outboard hehehe. I think they make a super queit exhaust with adjustable sound but you'll be 5gs out of pocket.

Should've heared my bassetts dry at 5K....yeah baby! I LOVE IT LOUD. Again just busting chopps.

Good luck brother but again, snails is the quietest you'll get (if quietest is even a friggin word, excuse me I've had a couple of jack and cokes).
Title: Re: Boat mufflers???
Post by: GT Jets on August 13, 2010, 07:09:30 PM
Have used these with good success, the rob a little bit of HP at the top, but do quiet them down...

http://www.hardin-marine.com/detail~ID~313.aspx (http://www.hardin-marine.com/detail~ID~313.aspx)

GT
Title: Re: Boat mufflers???
Post by: GlassCutter on August 13, 2010, 09:12:22 PM
Dang it GT   there you go again.

You teach me something just about every day on here.   I have NEVER EVER heard of mufflers for a log exhaust.
Title: Re: Boat mufflers???
Post by: GT Jets on August 13, 2010, 09:18:26 PM
Dang it GT   there you go again.

You teach me something just about every day on here.   I have NEVER EVER heard of mufflers for a log exhaust.

You have to remember, I was a boat mechanic for years and years......I still learn something new every day... ;)

If you have been a boat mechanic, it's amazing how many unsolicited friends you get to have the pleasure of knowing.. :screwy:

GT
Title: Re: Boat mufflers???
Post by: IRRebel on August 13, 2010, 09:19:37 PM
Dang it GT   there you go again.

You teach me something just about every day on here.   I have NEVER EVER heard of mufflers for a log exhaust.

Won't fit on most of our lil boats though......too long......But a grand Idea!!!  :thumbup: Maybe snail up some exhaust hose.........

Sounds counter productive to me. Been running open O/T headers since I started all this and Moo 2.0 may well likely gonna be running dry Zoomies......ILoveItLoud? Bah hrumph!

Don't worry about the locals complaining. It's jealousy and envy, likely. Only worry about the Po-Po complaining......otherwise, run the friggin thing!  ;)

Ray
Title: Re: Boat mufflers???
Post by: GlassCutter on August 13, 2010, 11:07:17 PM
Loveitloud --
Run some of them Borla's like the NW guys seem to do.   That will at least look familiar to them.  ::)
Title: Re: Boat mufflers???
Post by: iloveitloud on August 14, 2010, 04:30:18 AM
Thanks for the idea GT. I have seen this kind of muffler before, but I will need to get some exact measurements of a few different ones to see if any will fit. I don't have alot of room, but if I could cut a bit off each end of the muffler, they might fit.-----Oh, bye the way... The "ILOVEITLOUD" handle comes from my love of vintage audio gear, but an unkorked big block is pretty cool too.
Title: Re: Boat mufflers???
Post by: iloveitloud on August 14, 2010, 04:34:01 AM
I forgot to ask. Are there any servicable parts inside "snails" that could wear out or have been removed that might be making them louder?  I have never pulled out any of the plugs in them to see what is in there.
Title: Re: Boat mufflers???
Post by: Nordie on August 14, 2010, 07:51:24 AM
negative...there is no serviceable parts in the snails....
Title: Re: Boat mufflers???
Post by: 65BEAVER on August 15, 2010, 10:43:43 AM
Borla has new mufflers getting released soon that  kill no power at around 1,200hp and like 40hp at 1,400hp. I"ve got pictures on my phone and they are huge! Being water jacketed and all and I beileve around 20-22inches long. They are marketed for the off shore guys making decent steam.
Title: Re: Boat mufflers???
Post by: iloveitloud on August 15, 2010, 06:45:37 PM
I'm only running about 395-410 horsepower, but the boat performs well enough for me. The issue is that around here, everybody runs 75-120 horse outboards, with the occasonal 225 5.0 liter I/O. When I bring my BIG BLOCK BAJA out for a ride, it sets off everybody's radar.  I have had people give me the finger, and even come to my house, and complain! I have heard my boat with somone else driving it, and it is "NOT THAT BAD"---to me, but is no doubt, way, way louder(better) than anything that has been around here for at least 25 years. I have not had an encounter with the local cops, or DNR yet, but the wisconsin laws say 87 decibles...PERIOD, and you must participate in any form of test a DNR warden feels like performing. I am a vintage audio freak, so I know for sure that my boat won't even pass an 87db test on the trailer with the exhaust under water, let alone when the boat is on plane, and the exhaust is fully out of the water. I may have to resort to fabbing up some 90 degree elbows with down-tubes, to shoot the exhaust right into the water at the same level as the bottom of the boat.