Thread: Results: RXP-X Cut Intake Grate
04-28-2008, 10:43 AM #1
Results: RXP-X Cut Intake Grate
This weekend I broke down and decided to cut the wings off of my intake grate. In addition to cutting the wings off I sharpened every edge that comes into contact with the water. I also cut the lip off the reverse bucket. I had filled the rideplate holes too but found that after my first run they all came out, so I will fill them next weekend and see if I pick up more speed.
Results: My ski has 6 hours on it, stock air intake, stock prop, just cut reverse bucket and cut grate.
Before the cutting I was running 69.8 @ 8120 RPM constantly
After the cutting I could hit atleast 72.3 @ 8140 every time with the occasional 72.8 @ 8180 in perfect water conditions. In addition to the extra speed I truly believe the ski accelerates from a dig and pulls from midrange harder because the massive waterbrake is gone now, which is backed up by about a 40 RPM gain.
On the downside, there is no doubt the ski doesn't hook up as well. Some guys have reported no difference and it begs the question, how do they define rough water and hook-up? The ski still hooks up better than a standard 215 RXP but like I said, there is a difference in hook-up and how the rear of the ski feels.
The motor spins more freely now as well, not just by sound, but by feel too. I raced an RXT after the cut. He said to let him go first and then come after him. I left maybe 3-4 seconds after he did and in 30 yards I had caught him and in no time put about 10 ski lengths on him.
I will plug my rideplate holes next weekend and see if I can't get in the mid 73's.
Last edited by MPower; 04-28-2008 at 10:46 AM.
04-28-2008, 12:10 PM #2
- Join Date
- Apr 2008
Nice!! I cant believe that makes so much of a difference. I was thinking about doing the same to mine. What did you use to sharpen the edges??
04-28-2008, 12:33 PM #3
Just watch that buck. It will be interesting to see what happens. When you say you lost some hook up, do you mean while running in a chop, from a holeshot run, or just while turning in general? Great increase though.
04-28-2008, 04:27 PM #4
- Join Date
- Mar 2008
I have bought an extra grate for mine but, having recieved the RIVA package (minus grate and impeller), figured on waiting on the rest based upon the "Bucking" reports. I would love to be kept in the loop regarding your success.
04-28-2008, 04:30 PM #5
- Join Date
- Dec 2007
- Christchurch NewZealand
our rxp only bucked when we got over 77mph on glass water.
04-28-2008, 04:32 PM #6
Now get a wedge and I bet you will get atleast 74mph, 75 in cool conditions. It did not buck once on me going between 73 and 75 several times.
04-28-2008, 04:38 PM #7
Please be careful I ve seen a ski buck running 73-75mph over a long period of time at WOT.
Short runs i can t see it happening its over time it backs up.
04-28-2008, 04:44 PM #8
04-28-2008, 04:49 PM #9
Nice report, I'm waiting on the Riva grate. I can tell it was killing you. Hopefully not waiting til X-mas
04-28-2008, 04:49 PM #10
I have almost 2 hours on the X with this cut grate. No signs of the buck yet whether a short speed run or 1+ mile long speed runs.
I do think I will stop here however. Rideplate holes should get me past 73 mph and im calling it quits until the RIVA prop and grate come out.
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