Want more power where to start!!!!!!

[Michael211_2000]

The bike is bone stock ...i want it to run with other bikes just don't want to be the slowest one on the lake...

You're already going to be faster than the vast majority of the watercraft you'll meet on the water... most are going to top-out at 60mph if they can even go that fast (most are non-supercharged with lower horsepower engines).

You my friend are about to dump a lot of money into this watercraft (I prefer to call it a "watercraft") for maybe 2-3 mph extra top speed if your lucky (some have actually slowed theirs down by adding stuff to them, I've read on here myself). Most of that 2-3 mph extra speed will be achieved by pump improvements, an upgraded performance intake grate and a performance (Solas preferred) impeller will get you the most bang for the buck, most of the rest is just wasted money IMHO.

Small things many overlook that you can do yourself in an hour are filling all those ride plate bolt hole recesses with marine epoxy and sanding them flush, filling any and all gaps between the (upgraded performance) intake grate and the hull and the ride plate and the hull with black RTV silicone so that there are no gaps catching the waterflow. Fix any and all gelcoat scrapes/gouges in the bottom of the hull, out of sight does not mean they aren't causing drag the smoother the waterflow under your hull the better the performance will be!

You can also add a pump wedge, either 2 or 2.5 degrees, to get a little extra umph and better ride in rough waters (it causes the bow to ride a little higher at speed, less wetted hull less splash over the bow slightly improved performance). Again, pump upgrades are going to be the best money you can spend.

For reliability check your exhaust valve stems, you do not want the hollow sodium filled stems stamped number 72 you'd much rather have the solid upgraded valves with the number 75 stamped on them. They went to the number 75 upgraded solid stem valves sometime in the '06 year models.

All that other stuff... well if you got more dollars than sense then knock yourself out IMHO. You're already faster bone stock than most everything else on the water you'll ever meet, and ~70mph on the water on a PWC is already VERY VERY FAST you won't be going that fast most of the time the water just has to be near perfection to warrant that kind of speed on such a small watercraft I promise.

Regards.

- Michael

 

[Cotton03]

Thanx for all the info guys well to start it off I've ordered a 14/19 solars prop and a TORX 2.5 wedge R&D grate brand new XCHARGER 42lb injectors I've got it all on just waiting on a couple of other things before i drop it in the water for a taste RUN...WELL what do you guys think of this SO FAR is it in the right direction.

 

[Greg]

Let us know if there is anything else you need.. Use promo code SAVE7 at www.pwcmuscle.com to get 7% off your order.

 

[Cotton03]

Thanx i can really use that still got alot to buy...

 

[red2blue]

Thanx for all the info guys well to start it off I've ordered a 14/19 solars prop and a TORX 2.5 wedge R&D grate brand new XCHARGER 42lb injectors I've got it all on just waiting on a couple of other things before i drop it in the water for a taste RUN...WELL what do you guys think of this SO FAR is it in the right direction.

You're heading in the right direction, sure enough.

But if you forget the 4" front intake (or better)....you'll be very disappointed with result of all that $ and wrenchn.

 

[JoeZ]

You're heading in the right direction, sure enough.

But if you forget the 4" front intake (or better)....you'll be very disappointed with result of all that $ and wrenchn.

Agreed...gotta let it breathe. http://www.pwcmuscle.com/fizzle-4-air-intake-kit.html

 

[Cotton03]

Ive already got that taken care of...and ordered the rear exhaust and the opas blockoff kit to cant wait to get it put on..

 

[JoeZ]

Awesome. Sounds like you'll have a strong setup. Keep us posted!

 

[Brittons89]

I have a GTX-IS is that the same for mods?

 

[Cotton03]

I'm not for sure but their is some great guys on here that will no ..HEY CAN ANYONE ANSWER HIS QUESTION THANX GUYS, BRITTON JUST SEAT BACK AN WAIT U WILL GET ANSWERS..

 

[red2blue]

I have a GTX-IS is that the same for mods?

What model year?...motor...ect....heh

 

[Coastiejoe]

I bought goodies just as I stored my ski's last season. (Impeller, grate, wedge).

Looks like I need an intake as well. Just waiting for some decent weather to put the stuff on my RXT-X...

 

[Coastiejoe]

I bought goodies just as I stored my ski's last season. (Impeller, grate, wedge).

Looks like I need an intake as well. Just waiting for some decent weather to put the stuff on my RXT-X...

Got to thinking,,, Will I really gain anything with the upgraded intake as my max RPM's will be the same as I have a stock ECU?

Is there a low-end, mid-range or a top-end improvement with the intake?

Thanks in advance..

 

[JoeZ]

You'll gain acceleration, but the top end will remain the same. Gotta change the impeller or increase rpm. If you increase RPM though you really should upgrade the valvetrain. Have you checked your top speed stock? Might be fun for you to document the changes when you put all your go-fast parts on!

 

[Coastiejoe]

I bought an impeller, grate and a wedge to instal as soon as the weather breaks. Bought the 2.5 degree wedge as I hat VTS so I can adjust it down if I need/want to. lso bought the steering extension arm as the degree wedge is a pretty big difference.

I just bought a Etrex GPS a few days ago. I will take the ski out totally stock and see what I get and then swap the parts out and see what I get again. I probably will order the intake as well and put it on later and of course use the gps to see if there is any difference.

I would agree with your thoughts though, if there is any top end gain it will be minimal. I expect to feel it low and mid-range..

 

[red2blue]

Got to thinking,,, Will I really gain anything with the upgraded intake as my max RPM's will be the same as I have a stock ECU?

Is there a low-end, mid-range or a top-end improvement with the intake?

Thanks in advance..

Somehow missed or forgotten your earlier telling of the new goodies. A 4" front will typically net you an increase of 100-150 rpm over oem. Now your question is...will it increase your top speed if you're already on the limiter? No....of course not. So why do it? Because you're adding other things to the equation...no? Those other things will hopefully put a greater load on your motor...thereby taking you off the limiter...allowing you to take advantage of the extra rps your new air intake will net....which will hopefully bring you back to the limiter. What would that do?...increase top speed.

A wedge...will ease the path the water will travel from pump through the nozzle....an easier "bend" in the water's path is more efficient...which should then ease hp requirements allowing you "spend it elsewhere. I say should because I've never seen an rxt use one with vts...rxp's, yes...dunno why no rxt's. Over all a wedge isn't a big speed increase type of mod...in boats w/o vts it helps get more of the boat outa the water...but give a bit of a squirrely ride because of that. I remedied that squirreliness by adding skegs.

A grate....an after-market intake grate is a drag. By forcing more water into the tunnel you'll get two benefits. Better more even flow of water to the prop especially in choppy water..giving you better "hook up"...allowing your motor to keep more power to the water...more speed. It'll also help keep your prop fully loaded on glass....more speed. The down side..that extra drag requires some hp to overcome. That's why I don't advise someone with a stock ski to get a better grate alone...for top speed that is....w/o the extra ponies it'll slow the ski a bit because of the extra drag. Some say their ski handles better because of the more aggressive grate....I can't say that my Riva did so for me.

Now...you already have an overly aggresive grate...the x grates were made for one reason...to slow your boat down and keep you under the magic "70mph" CG approved top speed. Hopefully you got the R&D grate for t-x. If so it'll be less aggressive...less drag....more speed....once your off the limiter by use of...

Prop....which prop?

If all the above is true...and I'm betting it is...you'll see your biggest improvement by swapping your oem grate and adding your new prop.

Do keep a log...add one item at a time...air/water temp..fuel load...vts setting...water conditions...and corresponding mods.

 

[Coastiejoe]

Somehow missed or forgotten your earlier telling of the new goodies. A 4" front will typically net you an increase of 100-150 rpm over oem. Now your question is...will it increase your top speed if you're already on the limiter? No....of course not. So why do it? Because you're adding other things to the equation...no? Those other things will hopefully put a greater load on your motor...thereby taking you off the limiter...allowing you to take advantage of the extra rps your new air intake will net....which will hopefully bring you back to the limiter. What would that do?...increase top speed.

A wedge...will ease the path the water will travel from pump through the nozzle....an easier "bend" in the water's path is more efficient...which should then ease hp requirements allowing you "spend it elsewhere. I say should because I've never seen an rxt use one with vts...rxp's, yes...dunno why no rxt's. Over all a wedge isn't a big speed increase type of mod...in boats w/o vts it helps get more of the boat outa the water...but give a bit of a squirrely ride because of that. I remedied that squirreliness by adding skegs.

A grate....an after-market intake grate is a drag. By forcing more water into the tunnel you'll get two benefits. Better more even flow of water to the prop especially in choppy water..giving you better "hook up"...allowing your motor to keep more power to the water...more speed. It'll also help keep your prop fully loaded on glass....more speed. The down side..that extra drag requires some hp to overcome. That's why I don't advise someone with a stock ski to get a better grate alone...for top speed that is....w/o the extra ponies it'll slow the ski a bit because of the extra drag. Some say their ski handles better because of the more aggressive grate....I can't say that my Riva did so for me.

Now...you already have an overly aggresive grate...the x grates were made for one reason...to slow your boat down and keep you under the magic "70mph" CG approved top speed. Hopefully you got the R&D grate for t-x. If so it'll be less aggressive...less drag....more speed....once your off the limiter by use of...

Prop....which prop?

If all the above is true...and I'm betting it is...you'll see your biggest improvement by swapping your oem grate and adding your new prop.

Do keep a log...add one item at a time...air/water temp..fuel load...vts setting...water conditions...and corresponding mods.

NICE post RedBlue, I appreciate the input.
Don't recall the specs on the impeller but I researched it heavily, so pretty confident I got what I need. Main reason I got the wedge was for a dryer ride. Even with the VTS all the way up the hull throws enough water forwards that its a fairly wet ride. The wet is not so much the issue by it forces me to wear glasses or googles and then they get so wet I can't see well.

Will post how it all turns out.

Thanks again,,,

 

[red2blue]

anytime....

You should wear glasses anyway....wet/dry or otherwise. Keep a dry t-shirt in the bin and clean them every once in a while...I can't ride w/o shades...and they're safety glasses to boot.

If it was me....I'd add the etrex first...seriously though....prop first...why?...biggest change...for sure to see some loss in rpm....(15/21?....15/22?)

...next the grate

...then the air

save the wedge for last....you might decide to sell it on ebay...heh.

 

[Coastiejoe]

I ALWAYS wear glasses at the very least...

The ride is just a bit more wet than I would like in regards to actually being able to see at 50 plus MPH... LOL