rxtx speedos do they read higher then 70mph. so when i start doing mods from you guys at rivia i can see those results on the dreammeter or do i use my gps

It's always best to use a GPS or radar gun for testing. The stock speedo's just aren't accurate enough.

Make sure you baseline your craft before you begin modifying it so you have a starting point to work. After each modification or change do a run and document the results. Set up a special notebook (test log) to track your mods, results, etc so you can go back any reference should you ever have a problem or just want to look back on what you did and the affects it had.

okay sounds good 67.5 stock is what i ran so far but have not been on glass water yet.and they get there faster than 07 rxt didnt run into any rxp or rxpx yet does the rxtx have a better holeshot then rxp or rxpx. i just ordered they intake grate for it from you guys last night

Comparing stock craft set up identically (fuel level, rider weight, trim in nuetral, etc) a RXP-X will accelerate faster than a RXT-X. A RXT-X should accelerate faster than a RXP. All will do about the same top speed in stock form.

That's "great"!! That's the first key to unlocking the speed potential of the X-boats. Because our intake grate is more efficient than the stock grate you might experience a little more cavitation upon initial acceleration. You can try repitching the stock prop, but it will be hard to get rid of because of it's design. Once you upgrade to the 'R' Series 15/22 Solas Impeller and Pro-Series Reduction Nozzle the cavitation won't be an issue.

so the grate will unlock 2 mabe 3 mph then keep adding the rest of the stage one kit as i gps each part as i go like you point out in the post. what part rises the rpms prop or nozzel or both

Yes. As you add more components of the kit you will see increases in performance.

The grate and impeller allow the rpm to rise some. The most significant increase will come from the Performance Power Filter Kit.

The increased rpm provided by these components requires you to install the Pro-Series Reduction Nozzle so you don't hit the rev limiters. The stock reduction nozzle is 87mm. Our nozzle closes the outlet down to 82mm. Optimal engine rpm is 8,000 with the stock ECU.

is the stock rev limter 8150 i had a 05 rxp and on glass water 8050 was the sweet spot ishould have the grate in 4 days i think

The stock limiter on the X-boats is 8,100. But, that's the hard rev limiter. A "soft" limiter kicks in around 8,050 (+ or -). It's subtle at first, but becomes more noticeable as you approach 8,100. That's why we state the optimal peak rpm for the X-boats is 8,000.

thanks riva so thats what i shoot for is 8000with all the goodys from stage 1 kit installed sweet

Riva My RXT-X tach showed 8060rpm at one time, So the limiter is only 100rpm more? at 8100rpm, why so close most give a couple hundred like 8400rpm what happen to that? Mine seems to hesatate when you give it a hand full of throttle is this right. because if you ease in to the throttle it doesnt do that. Or is that cavitation, to me it seems like its cutting off the fuel or power. never had a boat do that kind of power loss, my other boats never did that.

Actually, 100rpm is a lot. If you're seeing 8,060rpm regularly I would recommend having your prop repitched slightly. There are many vairables that come into play that could allow your craft to run a at slightly higher rpm as compared to another.

What you're experiencing is the hard rev limiter. If the prop slips enough to allow the engine to rev to 8,100rpm (even for a split second) the rev limiter will kick in basically killing the power.

It only hit 8060rpm one time so far, most of the time its 8000rpm. the hesatation starts around 7000rpm then i back off the throttle. So hopefully the shop will find this problem when i take it in monday for 10hrs check up.

sounds like 8000 rpms is premo for sweet spot depending on glass water or rough

quote:

sounds like 8000 rpms is premo for sweet spot depending on glass water or rough

i still havent seen over 70 mph on the speedo mabe you half to be doing over 70mph on the speedo to see it move to 71 or 72 !!!!!!!!!!

so does any one here have the answerfor the speedos on rxtx boats when iam dun puting in the the stage one kit will my stock speedo start reading over 70 or not

The speedo won't go over 70mph no matter how fast you are going. My speedo reads 70mph from 68-76mph on the GPS.

what kit do you have on your rxtx stage1 from rivia is that how you are getting 76mph

tell u the truth i hit 8040-8060 night and day im 260 bodybuilder and mostly raced with full to half tank of gas. there is 6 other rxp-x in my hood and raced them all, all summer flat water i would b a half ski ahead of them, every since i got a rock in the prop and had to change it and the liner i have not gone over 7960rpm and ive been even with all the skis i was half a boat ahead. so take it for what its worth but 100 rpm helps

top speed on this boats are there ill tell you water temp 66 degs first run 69.1 sec run 69.6 third run 69.9 not glass water yet so 08 rxtx stock with riva intake grate 44hrs on it know