3rd rave valve????

[wutagoalie]

1998 GTX Limited

Just cleaned my rave valves (2 of them) on the engine, noticed near the back of the machine on a largw black tube ( maybe exhaust muffler?) there is another rave valve, should i clean that one as well????? what is it for??

also i noticed that the two main ones on the engine, the red caps are screwed all the way down. But that third valve near the back, its red cap is loosened almost right up?

just wondering

 

[scooper77515]

That is not a RAVE valve, but is a regulator for the water that is sucked into the engine for cooling.

DO NOT ADJUST it! It is set at the factory and should never be adjusted or you could blow up your engine.

The two actual RAVES on the engine are usually set either all the way down or flush with the top. Those CAN be adjusted, and will affect how soon the valves open up and let the engine hit it's "power band". I have never messed with them, and run mine flush to the top, and both my toys run fine that way. I may someday crank them down to see if I even tell a difference.

 

[wutagoalie]

Thanks scoop, so i guess i better leave that one alone. So if that one was taken apart the inside would be totaly different from the rave valves on the actual engine. My rave valves on the engine are screwed all the way down, i will try and back them off so they are flush, just want to see what the difference is.

Also, i took pictures when i took my rave valves off and cleaned them, how do i go about starting a sticky on that post, and whats the best way to add all those pictures?

 

[scooper77515]

It isn't a RAVE valve so when you take it apart, it will have an entire different assembly under it. Not sure why they used the same type of housing as the RAVEs. Probably just to confuse people.

PM a moderator Kustom Karl or Seadoosnipe and get instructions for the sticky, unless it is in the instructions, which I could not find it there. It may have to be set up by them.

 

[wutagoalie]

thanks, yeah using the same housing is dumb, i was ready to take it apart. Thanks

 

[Chester]

That is not a RAVE valve, but is a regulator for the water that is sucked into the engine for cooling.

DO NOT ADJUST it! It is set at the factory and should never be adjusted or you could blow up your engine.

The two actual RAVES on the engine are usually set either all the way down or flush with the top. Those CAN be adjusted, and will affect how soon the valves open up and let the engine hit it's "power band". I have never messed with them, and run mine flush to the top, and both my toys run fine that way. I may someday crank them down to see if I even tell a difference.

It cannot blow up the engine. It ONLY affects the water that gets injected into the exhaust system. It has nothing to do with the engine cooling system. If it were to fail, you only risk overheating the rubber hoses in the exhaust system. If you have a close look at it, and the way the water lines are routed to and from it, you would understand how it works. I have been adjusting the water regulators on Sea-Doos since 1995 for my customers. They usually want a little more top end so I adjust them all the way out.

Chester

 

[scooper77515]

I don't have access to it from my laptop, but if i am not mistaken, the BOOK says to not mess with it as it "may" cause catastrophic engine failure if you mess with it (and don't know what you doing, which MOST of us don't).

 

[Chester]

I don't have access to it from my laptop, but if i am not mistaken, the BOOK says to not mess with it as it "may" cause catastrophic engine failure if you mess with it (and don't know what you doing, which MOST of us don't).

Oh I do know what the book says, and you are right that it does say that. I also know what works and how it works. Changing the adjustment will only change the amount of water that is injected into the headpipe. Having said that, if you were to actually completely pinch off the water line from the regulator to the headpipe, the exhaust chamber would overheat and melt the hoses. That's about as catastrophic as it would get. The engine itself (or the cooling to the engine) would not be affected at all.

Chester

 

[wutagoalie]

Chester, is that why that one valve is backed way off? compared to the exhaust valves that are all the way down. regardless, i wont mess with that one anyways.

Thanks guys

 

[Chester]

Yes, at that setting the pipe is dried out somewhat allowing the engine to rev higher.

Chester

 

[scooper77515]

Chester, I agree, and I know you know your stuff, but what I was getting at was most of us don't know how to adjust that thing (many of us don't even know what it is!), so I don't tell non-pros that it is adjustable. I stick to the book when people don't have the knowledge to mess with something or know how it works. Just safer that way.

So, if I was going to make any adjustments to that thing, I would be asking you through PM, rather than tossing out there for all the non-pros to give me mixed feedback.

So anyone who thinks it is a RAVE valve, I am going to give them the book answer which is "Don't Touch!" :cheers:

 

[Chester]

Chester, I agree, and I know you know your stuff, but what I was getting at was most of us don't know how to adjust that thing (many of us don't even know what it is!), so I don't tell non-pros that it is adjustable. I stick to the book when people don't have the knowledge to mess with something or know how it works. Just safer that way.

So, if I was going to make any adjustments to that thing, I would be asking you through PM, rather than tossing out there for all the non-pros to give me mixed feedback.

So anyone who thinks it is a RAVE valve, I am going to give them the book answer which is "Don't Touch!" :cheers:

Fair enough. :cheers:
Chester

 

[KSUBrian]

It cannot blow up the engine. It ONLY affects the water that gets injected into the exhaust system. It has nothing to do with the engine cooling system. If it were to fail, you only risk overheating the rubber hoses in the exhaust system. If you have a close look at it, and the way the water lines are routed to and from it, you would understand how it works. I have been adjusting the water regulators on Sea-Doos since 1995 for my customers. They usually want a little more top end so I adjust them all the way out.

Chester

My book says the proper adjustment is to tighten it all the way in until resistance and then back it back out 3 whole turns. This leaves the red screw about flush with the top of the black cap. To increase top end from that point, do I need to screw it in or out? I would think screwing it in (putting more pressure on the spring) would restrict water flow into the tuned pipe & water box and out would let more in.

 

[Chester]

Turning it out will restrict the water to the headpipe for more top speed. I doubt you will get much more out of it.

Chester

 

[KSUBrian]

Turning it out will restrict the water to the headpipe for more top speed. I doubt you will get much more out of it.

Chester

Thanks Chester. Probably not worth the risk of changing what factory recommends if not getting much more out of it.