Wet exhaust

[Blackmagic94]

Do I legally need wet exhaust on a jet boat for lake Havasu City

 

[BoatCop]

Wet or dry doesn't matter. You need to have an effective muffling device installed, in constant operation, and can't exceed certain noise levels.

I won't go into all the noise (decibel) level stuff, but if there's a muffling device (including those that inject water directly into the exhaust stream at the individual header pipes) installed and working, AND aren't being an asshole, then LE will pretty much leave you alone, for the most part. But if you're blowing pipes just for the sake of blowing pipes and showing off, OR using an exhaust cut-off to bypass the muffler you WILL get a talking to.

 

[mash on it]

I've been checked for baffles (if you want to call them that, as little baffle as possible) several times and they were OK with that. Water injection too. Dry was way too hot. This on a stock-ish Sbc.

Dan'l

 

[Blackmagic94]

So actually mufflers or baffles and I’m legal. Check

 

[wzuber]

So actually mufflers or baffles and I’m legal. Check

No..not "legal"...re-read what boat cop said.
I have yet to see tests where the typical basset style baffle/muffler or water injected headers PASS a decible test. I recommend you research that, especially with the blower.
If you boat under the influence it could potentially create a lot of trouble for you. Having excessive exhaust noise will potentially get you a visit, most certainly if your being unsafe, obnoxious or somebody complains about you etc. It's just another reason/opportunity for them to hassle you, board your vessel and see what they can trip you up on. Having fun yet? haha

 

[Blackmagic94]

Wet or dry doesn't matter. You need to have an effective muffling device installed, in constant operation, and can't exceed certain noise levels.

I won't go into all the noise (decibel) level stuff, but if there's a muffling device (including those that inject water directly into the exhaust stream at the individual header pipes) installed and working, AND aren't being an asshole, then LE will pretty much leave you alone, for the most part. But if you're blowing pipes just for the sake of blowing pipes and showing off, OR using an exhaust cut-off to bypass the muffler you WILL get a talking to.

so if I have mufflers on the headers installed on the jet boat but no water injection. Legal or not? If it is within the dB threshold.

 

[n2otoofast4u]

so if I have mufflers on the headers installed on the jet boat but no water injection. Legal or not? If it is within the dB threshold.

You don’t want to play the DB game. The SAE J2009 or whatever the fuck it is, places the DB limits at unrealistic levels.

Just make an attempt to quiet it down a bit, and don’t act like a jackass!

 

[Carlson-jet]

So you have everything dialed in close and are ready for a test run?

 

[n2otoofast4u]

This was my program on my hydro here in Oregon, where they are noise assholes! It never actually passed, but it was the attempt that made them leave me alone!

 

[Blackmagic94]

So I am going to run a wide band hence why I don’t want water anymore

Should I block off the water feed line to the wet exhaust or should I make that hose run all the way to the transom and dump to keep flow up.

 

[mesquito_creek]

Small block chevy with lightning headers with water flowing, through the hull exhaust just at the waterline be considered a good neighbor to the cops?

 

[wzuber]

So I am going to run a wide band hence why I don’t want water anymore

Should I block off the water feed line to the wet exhaust or should I make that hose run all the way to the transom and dump to keep flow up.

depending on how you've run it either will work.

 

[Blackmagic94]

Would blocking off the line that fed the exhaust cause a flow issue in the block


an-08 feeds and splits to both headers with the t valve that opens at 1800 rpm

an-08 on other side of intake goes straight to bulkhead fitting at transom.

 

[wzuber]

Would blocking off the line that fed the exhaust cause a flow issue in the block


an-08 feeds and splits to both headers with the t valve that opens at 1800 rpm

an-08 on other side of intake goes straight to bulkhead fitting at transom.

block it at the T and run it. If you can't balance the oper. temps like that you can add the 2nd. outlet. Have a contingency plan for it in mind just in case.

 

[Sharp Shooter]

It depends on the cops where you're boating. I've seen people get away with zoomies right in front of cops and also seen completely legal set ups and the owners getting hassled. Back when I ran my Hondo flat (several times a month all over the river and local lakes including Havasu), I had water injected Bassett headers with Bassett mufflers and never had a problem. Decades ago I was out with my Dad on his boat on Mohave. He had a Flat bottom with ot wet logs and mufflers and all we were doing was skiing. We were told to leave the lake or get a ticket. It's luck of the draw with whomever LEo is working that day.

My old Hondo

Dad's flatty

 

[wettrthebettr]

I had sprint race car headers mounted up side down dry stacks on my Flatty, we called it the bat mobile, then later put wet logs threw the transom
At Bullards Bar Reservoir up northern Cali, No Sheriff patrol to worry about, in 80's,90's, in 2000 Sheriff's would Patrol.
When we wanted to Race or show off we would wait till the sheriff Cruises by then the coast is clear to Race or show off.

 

[HALLETT BOY]

It all depends on the officer , these guys were working with Lake Mead National Recreation area Rangers , I have water jacketed , non-removable Imco Gattlins , still got a ticket . Do a search here , there’s a thread .

 

[Blackmagic94]

National park Nazis no wonder

 

[BoatCop]

So I am going to run a wide band hence why I don’t want water anymore

Should I block off the water feed line to the wet exhaust or should I make that hose run all the way to the transom and dump to keep flow up.

Blocking off any muffling device is illegal. Water flowing to just the exit point of an exhaust is NOT a muffling device. It's just a river-water recirculating device.

In order for a "wet" exhaust (water only) to be accepted as a muffling device:

(1) water must be injected (sprayed} into the individual elbow(s) of the headers in sufficient amount to muffle the noise of the exhaust, or

(1a) Be part of an enclosed exhaust manifold system, including risers, with water flowing throughout the exhaust stream.

(2) There must be no devices in the system (remote operated solenoid, diverter valve, etc) designed to shut off or re-direct the water flow away from the exhaust

(3) If no water flows at idle, (to prevent inversion) it must be designed to automatically open before the engine reaches a RPM to begin producing "unreasonable" noise.

 

[wettrthebettr]

It's the law!!! If you get Caught

 

[Blackmagic94]

So I’ll ask this again if the headers have welded on mufflers and absolutely no hook ups for any kind of water to flow through the exhaust is a dry exhaust legal with an actual muffler?

 

[RiverDave]

So actually mufflers or baffles and I’m legal. Check

If you aren’t being a dickhead about it nobody is gonna harass you.

 

[RiverDave]

So I’ll ask this again if the headers have welded on mufflers and absolutely no hook ups for any kind of water to flow through the exhaust is a dry exhaust legal with an actual muffler?

yes

 

[getreal]

But you can have a sound system that is 10 times louder than your exhaust

 

[TITTIES AND BEER]

It's the law!!! If you get Caught

I never got checked mine was loud but I also didn’t run around being a dick was on mead one weekend going through the narrows about 50 mph went by a cove as I passed the guy with me saw the cop and he turned on the lights we hit the big basin 4’ rollers hang on once he / she ? hit them off went the lights and turned around

 

[KevinR]

Will have to wait and see about this set up come summer. Ran it a few times in the fall and no issues.

 

[Blackmagic94]

Will have to wait and see about this set up come summer. Ran it a few times in the fall and no issues.

View attachment 849485

Turbos are a very effective muffling device

 

[wzuber]

Turbos are a very effective muffling device

yes indeed...nothing like reasonably quiet hi power of a turbo motor.

 

[Tank]

Mmmmmmmmm....Love the sound of dry exhaust in the morning.

 

[was thatguy]

Will have to wait and see about this set up come summer. Ran it a few times in the fall and no issues.

View attachment 849485

Good God...

 

[KevinR]

Good God...

View attachment 849569

Hahaha!
Some of you may remember this Schiada was Steve-Os. We did not get to meet him. When we posted some shots of the renovation last year on the Schiada thread a number of you mentioned you knew him and the boat well, in its original configuration.

 

[Blackmagic94]

 

[Blackmagic94]

Muffler assembly need to weld it up still. Blower install moving along

 

[n2otoofast4u]

LOL...... you might as well just write yourself a ticket now! You’d be better off with nothing, and playing dumb!

 

[Blackmagic94]

Why it’s quieter then what I was running. The wet exhaust doesn’t flow at idle to 1700 rpm. At least this has a muffler for all rpm now

 

[motormonkey]

You might want to run those with some 90s up dry or out to the sides with water after your 1700.
I say those things above as everytime I was checked with headers, they would stop me before I even launched. They would look down the headers for a baffle device.

 

[floatn turd]

I scrolled thru this thread and maybe I missed it.
But I'll spout my worthless opinions anyway.

If your boat is small and a jet, you really can't run it at Havasu most weekends anyway.

It will straight sink in those shitty ass 5ft waves.
And that's also when the cops are plentiful as well.

If you go during the weekdays the water is nice, the cops ain't out and the noise won't matter at all.

You'll also get better water and zero cops if you launch out of Park Moabi as well.

I have never been hassled by "the man" for mine at either Havasu or Moabi.
You just have to lay low, boat right and avoid certain launch ramps.
I wouldn't worry too much about it the noise.

IMO, I would not dump a bunch of money into the exhaust to change it until you have had a problem with "the fuzz", but I doubt you ever will.

But that's just me.

FT

 

[vstdispatch]

View attachment 850436 View attachment 850437 View attachment 850438

No offense but why did u put a blower on your boat and now put mufflers on? Kind of seems like your ruining the whole point...

 

[mash on it]

No offense but why did u put a blower on your boat and now put mufflers on? Kind of seems like your ruining the whole point...

It's not a top fuel motor.

Even logs and snails would be fine.

It's not the route I'd go either.

Dan'l

 

[EL PROPO]

I have DRY exhaust CMI headers on my 540 blown bbc , that are jacketed and water exits out tail pipe tip . They sound amazing and loud and have yet to have a problem!

 

[rivermobster]

I scrolled thru this thread and maybe I missed it.
But I'll spout my worthless opinions anyway.

If your boat is small and a jet, you really can't run it at Havasu most weekends anyway.

It will straight sink in those shitty ass 5ft waves.
And that's also when the cops are plentiful as well.

If you go during the weekdays the water is nice, the cops ain't out and the noise won't matter at all.

You'll also get better water and zero cops if you launch out of Park Moabi as well.

I have never been hassled by "the man" for mine at either Havasu or Moabi.
You just have to lay low, boat right and avoid certain launch ramps.
I wouldn't worry too much about it the noise.

IMO, I would not dump a bunch of money into the exhaust to change it until you have had a problem with "the fuzz", but I doubt you ever will.

But that's just me.

FT

View attachment 850804

This x1000

 

[Blackmagic94]

No offense but why did u put a blower on your boat and now put mufflers on? Kind of seems like your ruining the whole point...

Because I’m eliminating the wet exhaust. I’m running a completely different set of headers that have no water injection and the reason that the water injection was removed is because you can’t have water flowing over an oxygen sensor. I will be running a wide band oxygen sensor to be able to dial the carburetors and perfectly for the air fuel ratio because it’s 2020 and not 1950 any more

 

[Blackmagic94]

This x1000

You know I have a 35’ cigarette for real water right

 

[Blackmagic94]

I have DRY exhaust CMI headers on my 540 blown bbc , that are jacketed and water exits out tail pipe tip . They sound amazing and loud and have yet to have a problem!
View attachment 850904
View attachment 850905

so the water out the pipes is dry? Lol

When I mean dry I mean zero water in the exhaust

 

[rivermobster]

You know I have a 35’ cigarette for real water right

You know this thread is about your jet bote, right?

 

[Blackmagic94]

Well then we don’t need to discuss the merits of what and when a jet botë is safe to operate.

 

[EL PROPO]

so the water out the pipes is dry? Lol

When I mean dry I mean zero water in the exhaust

Yes no water in my exhaust it is just to cool the pipes they are jackets

 

[vstdispatch]

Because I’m eliminating the wet exhaust. I’m running a completely different set of headers that have no water injection and the reason that the water injection was removed is because you can’t have water flowing over an oxygen sensor. I will be running a wide band oxygen sensor to be able to dial the carburetors and perfectly for the air fuel ratio because it’s 2020 and not 1950 any more

Lol ok got ya well maybe just put bigger jets play it safe and check plugs like its 1950 but u must be trying to set the world on fire. Remember loud pipes save lives

 

[River Runnin]

All I know is!! Mine sounds Awesome!

 

[floatn turd]

Well then we don’t need to discuss the merits of what and when a jet botë is safe to operate.

It's all good brotha.

As I have never met you and didn't know your boating history.
I was simply going off the size of your squirter, from the pictures you posted and trying to give some context as to why quieting down your motor may not necessarily be needed, if fear of fines / tickets were the only motivation while on the Lake.

IF you did happened to be "new" to the world of small jet boats, information could be King on a Lake of weekend 40ft monsters.

A safety lecture was not the intent.

Us little boats gots to stick together!
#jetboatsmatter



FT