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Resonator???

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gtfireftr

gtfireftr

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I think that is what they are called..... Plastic looking units that go on either side of the hull in rear with a hose attached to them and exit out the side of the ski (I think anyway). The one on the left side has some type of epoxy on it.... maybe to patch a hole..... I did a search, and I think there is a way to bypass the whole deal.... anyone have any input on this....
I know Grizz had made a post.... Just looking for advice...... this forum has been a great resource, and I thank everyone who has helped me......
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My boat also has one of those resonators installed in the bottom port side of the bilge, I'm pretty sure it's made of HDPE (High Density Polyethylene)

Personally, I think I'd rig a bypass using PVC pipe & fittings from home depot and if too noisy use that until I located a replacement OEM part. There are no good solvents for welding HDPE that I know of, but might be possible to thermally weld a repair using a technique called "thermoplastic welding" as a third option depending on the circumstances, but I'd probably skip that option.

http://www.ehow.com/about_5563302_types-thermoplastics.html
 
Does water go through that system, so it would have to be water tight? Not exactly sure how it works..... Perhaps someone could chime in and explain it to me???

Thank you
 
Yes, the water injected into your exhaust system serves two important functions. The first is the water provides a measure of cooling to keep temperatures in the safe range, and secondarily specific to two-stroke engines, the sonic length of the expansion pipe is dependent on how much water resides in the expansion pipe under specific conditions, for a kind of "turbo-charging" effect that benefits from exhaust reverberations and savaging of exhaust gasses from the cylinder.

So, it's important your exhaust water injection system is working correctly, this includes any clogging of the injection hoses and fittings with sand or marine debris, some of these hose adapter fittings are of a specific diameter chosen by the factory to optimize the water injection, and effect the combustion process, maintaining the exhaust system tune by controlling the volume of water injected under a variety of operating conditions.

In general, it's best not to change the design inadvertently if possible unless maybe you are familiar with tuning 2 stroke exhaust systems and how they function, there is an art to this. Remember, some of the parts are specifically chosen for a purpose and play an important role in maintaining the engine's tune.
 
Sportster, so you are basically saying that the resonators are not necessarily required, but they are useful for an optimal tune, and therefore longevity and performance of the engine?

Thanks for the detailed info......
 
im at work right now, but in the past, ive posted how to elimate all that crap, and put a hose like i have ....
go to my profile and i have some albums, look at the album -- under the seat and you will see my exhaust with just a single hose eliminating all that, i have the part number some where, later tonight i will look in the garage at the part number on the hose, but will be like 8;00 or so ... look and see what i did in the pics, if you search forum here, i posted part number before ...
 
I did see that grizz....... I just want to be sure that if I eliminate the resonators there are no collateral issues with the new motor etc...
Thanks
 
No, it will just make it louder and maybe a couple HP increase. As long as you dont modify the cooling system (which you wont) it will be just fine.

I do have good used ones in stock if you decide to go that route.
 
Thanks Nick,
So just a hose from the water box to the output of where the left side resonator dumped out???
 
Yeah, it's the dynamic balance in the expansion pipe that's most important. I wouldn't expect to see much if any difference if the resonator was bypassed b/c it's so far back in the exhaust any changes there probably won't have much notable effect other than change the sound maybe. Loud sounds faster, right?

Edit: Maybe the extra sound waves exiting from behind actually help to push the transom forward? (kidding!) :)
 
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I had to bypass a melted one on my 99GSX ltd due to it being a not replaceable or really obtainable part. Had I had the option, I'd have bought the $30 part. I don't notice or feel any more Hp, I just live in fear that my PVC exhaust will come undone a mile off shore and sink my ski.... So yeah....
 
So I removed the 2 resonators on either side of the hull, then I noticed what I think is another one on the left side tucked up under the lip, on top of some foam. Should I remove this one as well?? I ordered the hose that Grizz had posted, but not sure if it goes to that one or just eliminate it all togather.

Thanks.
griz400 said:
here is the link where we talked about it before, i posted part number there before, http://www.seadooforum.com/showthread.php?49491-New-Resonator-or-Bypass-it-99-GTX-RFI also, mine has been working fine for quite some time ...
Click to expand...
 
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