04-22-2007, 10:32 AM #1
15/18R VS 15/19R 3 blade on modded RXT
I back to back tested the 15/18R and 15/19R 3 blades on a customers modded RXT yesterday.
With the 15/18R + 2 mm in the trailing edge the best i was able to get was 74.6 and was all over the limiter. We immediately went back and installed the 15/19R + 2 mm and the ski went 77.1 and was still all over the limiter. These 15/19R's are magical
81 mm nozzle on both tests.
On the 77 mph run throttle was only about 3/4 throttle to keep it off of the limiter. I put another mm pitch in it and may try a 80 mm ring.
Goal is 79-80 mph. This ski has no internal mods, just Riva valvetrain upgrade.
04-22-2007, 10:37 AM #2
If you added 2 mm to the props that would make them
15/20 & 15/21 right? This must be a stage 3 rxt 'eh?
04-22-2007, 10:40 AM #3
- Join Date
- May 2005
Is this a stage 3 or does it have a rude charger.
04-22-2007, 10:46 AM #4
04-22-2007, 10:52 AM #5
04-22-2007, 11:55 AM #6
- Join Date
- Jul 2005
- So. Cal.
04-22-2007, 12:06 PM #7
What im saying is bending the trailing edge + or - 2 mm does not change the pitch. It's just a "tweak" to the impeller.
Bending the trailing edge +2 mm does not make a 15/19R a 15/21.
04-22-2007, 12:44 PM #8
77.1, nice... I wonder what the official speed record is for the RXT?
Anyone know? I'll bet you get 80 too...
04-23-2007, 06:33 PM #9
- Join Date
- Jan 2006
- Puerto Rico
Another thing, i am still waiting for the info that i asked you in a PM a couple days back, tomorrow i am gonna install my digital boost gauge but before i take out my Riva S3 SC to send it to the new owner i am gonna take some boost readings @ 8100, 8200, 8300, 8400 and 8500 rpms, to compare the numbers vs the Rude SC and if by any reason i can't find the info that i am looking for here in your board there is no problem, i have a close friend that is willing to lend me his Rude charger for some testing cause his engine is out of the ski installing new pistons and rings, also looking about how fast my ski was running yesterday....... (all the people there was saying that my moded RXT was faster from the hole than all the others moded RXT'S including a few with the high psi Rude, B kit's and skat 3 blade props SO SHOW ME THE NUMBERS IF YOU WANT MY MONEY!!!, thanks
Last edited by GPR/STX-15F/RXT; 04-23-2007 at 06:35 PM.
04-23-2007, 09:51 PM #10
Originally Posted by GPR/STX-15F/RXT
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