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This is a discussion thread titled "How should I do through hull custom exhaust on my jet boat??", within the Off-Topic forum, part of the General Forums category.
How should I do through hull custom exhaust on my jet boat??
I have a 2007 Sea Doo 150 Speedster 215hp jet boat and am trying to get a better exhaust note and maybe free up some more hp by opening up the exhaust a bit and shooting it through the hull in the rear and out the back. Anybody have experience with this sort of thing and what types of tubing should I use for a marine exhaust system? Thanks
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Re: How should I do through hull custom exhaust on my jet boat??
not sure on your boat. the wife and i have almost decided our next boat will be the yamaha twin jet boat but just so u know i heard one the owner had done exhaust work on and on that boat it sounded very weird....of course that boat is a 23 foot boat and yours ismore sporty i guess but id be leery of what it would sound like. same reason we dont have thru hull on my 3.0 sterndrive......
Re: How should I do through hull custom exhaust on my jet boat??
Quote:
Originally Posted by FIVEPOINTSEVEN
I have a 2007 Sea Doo 150 Speedster 215hp jet boat and am trying to get a better exhaust note and maybe free up some more hp by opening up the exhaust a bit and shooting it through the hull in the rear and out the back. Anybody have experience with this sort of thing and what types of tubing should I use for a marine exhaust system? Thanks
Stick a couple of fat chicks in there and the engine will probably make a sound similar to what youre trying to get
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Re: How should I do through hull custom exhaust on my jet boat??
You could get a custom exhaust by putting a Trojan Magnum at the end. My friend's thought it'd be funny if they put one on my 4runner. Well, I guess he wasn't going to use it for anything else.
-rockstate
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2007 Toyota Tundra 5.7, 4x4
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Re: How should I do through hull custom exhaust on my jet boat??
Quote:
Originally Posted by rockstate45
You could get a custom exhaust by putting a Trojan Magnum at the end. My friend's thought it'd be funny if they put one on my 4runner. Well, I guess he wasn't going to use it for anything else.
-rockstate
Now THAT is funny
__________________
2007 Tundra DC 4.7 SR5 TRD 4X4
Pyrite Mica
Clear Bra
ARB Bumper w/hidden winch &
added 2.4" Ready Lift
Line-X
325/60/18 Nitto Terra Grapplers
18" KMC XD Hoss Black
ARE CX Series Topper
KC Rally 800 long range lights
Tinted windows
Wet Okoles Frt & Rear
Weather Tech rain deflectors
Weather Tech floor liners frt/rear
Garmin GPS
Bel Vector 995 Radar Detector
Cellular booster
Debadged except TRD sticker
Roxy Sticker
____________________________
Wish list:
Horn Blaster train horn, ARB rear bumper w/guards (if they ever make one), TRD sway bar, Winch and a TS tank top
__________________________________________
Re: How should I do through hull custom exhaust on my jet boat??
Quote:
Originally Posted by FIVEPOINTSEVEN
I have a 2007 Sea Doo 150 Speedster 215hp jet boat and am trying to get a better exhaust note and maybe free up some more hp by opening up the exhaust a bit and shooting it through the hull in the rear and out the back. Anybody have experience with this sort of thing and what types of tubing should I use for a marine exhaust system? Thanks
You'll have to use Stainless Steel. Contact your local marine and I'm sure they'll be happy to set you up....for a nominal fee of course.
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Re: How should I do through hull custom exhaust on my jet boat??
Stainless or aluminum. You could actually use stainless with silicone joints since there is water being injected into the exhaust. The water cools it enough so that it doesn't melt the silicone.
I have the resonator removed from my rxp-x but it still exits in the stock location. It sounds pretty good, but I'm going to do a through hull soon as well as gutting the water box. Should sound pretty nice after that.
Re: How should I do through hull custom exhaust on my jet boat??
Quote:
Originally Posted by rx7vert
Here's what one sounds like with full exhaust. This is an RXT, the 3 seat seadoo with the same 215 motor as your boat.
I just ordered a modified custom waterbox and I'm removing the resonator this week also. I switched out my intake to a K&N cold air with 3.5" piping and am going with a Solas 14/19 Concord prop. Also getting the R&D C3 supercharger wheel and possibly injectors, intercooler, etc...Maybe skegs too...I'm busy with this boat hehe.
__________________
DCSB SR5 2WD
-THE MONSTROUS 5.7
-6SPD AUTO
-STEBEL 300HZ TRUCK HORN+2 FACTORY HORNS
-K&N 77 SERIES INTAKE
-TOYTEC 3" LIFT
-DEBADGED
-SYLVANIA H9 LOW BEAM MOD (2100 LUMENS)
-HIR1 HI BEAM MOD (2350 LUMENS)
-SILVERSTAR EURO SIGNALS
-BLACK HEADLIGHT MOD
-BLACK BADGE
-JBL 440W SYSTEM W/ NAV W/ BACKUP CAM
-SONAR
-ESCORT PASSPORT 8500 X50 RADAR
-MOTO METAL 951 18" RIMS
-MAGNAFLOW 14" 2 IN/2 OUT CATBACK EXHAUST -SYSTEM WITH 4" MAGNAFLOW TIPS
-BFG TA KO 285/65/18's!!(32.7")
-CHROME TOYOTA NERF BARS
-BEDLINER
"As I walk through the valley of the shadow of death I have no fear because I am the meanest motherf*cker in the valley"
Re: How should I do through hull custom exhaust on my jet boat??
If you get the C3 wheel, you will need either 42lb injectors, or a rising rate fuel pressure regulator. If you run the C3 on the stock 38lb injectors with no mods, you'll lean out the motor.
The intercooler alone will net you about 30hp. Don't go with the riva intercooler though, we've seen problems with them leaking water into the intake. the core is not very good in them. The XS intercoolers or the stock intercooler out of a rxt-x or rxp-x are the best 2 out right now.
Oh, and go to www.greenhulk.net to get some really good info on these motors. I might have told you that before, not sure though...
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How should I do through hull custom exhaust on my jet boat??
Re: How should I do through hull custom exhaust on my jet boat??
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