Thread: Today's Speed Run Results
12-30-2008, 06:57 PM #1
Today's Speed Run Results
I had a perfect day to test the repitched prop and new grate today . The water was unusually calm with few (if any) boats on the river. And to top it all off, a friend showed up on his 08 RXT right after I put mine in the water. With the tank topped off right to the cap and the engine warmed up I GPS'd
a 71.7 peak and a 71.5 average at 8100-8120. We went and cruised the river for an hour and a half and I dropped him off at his place (on the river). Then I headed back to the air base's cove which is sheltered from the wind to see what it would do after burning off 2/3 of the tank. Average top speed was 72.5 and peaked at 72.6. By this time rpm's had dropped to 8060 from heat soak. I could have burned off some more gas but I figured that was good enough. I had hoped for a little more but I'm not complaining.
12-30-2008, 07:01 PM #2
12-30-2008, 07:11 PM #3
YO GOAT - That's one fast couch good job! Are you running stock air intake or 4" Kanaflex? What did you re-pitch to? My research is showing 75-76gps T-X's re-pitching to 12/23 with 83mm nozzle. Your getting close!!!
12-30-2008, 07:15 PM #4
It's got all the factory plumbing with an R&D 4" filter stuck on the end of it. I intend to go with the kanaflex, maybe at tax time. So I guess it's a 4" stock intake. The ski was hitting the limiter real bad so I did the prop myself. It's now a 13/24. Originally it was a 13/13/14/14/by 21/21/21.5/24.
12-30-2008, 07:41 PM #5
mmm, that stock impeller was dead on, probably custom tweeked for your ski on the factory line, what made you think you needed to change their settings??
12-30-2008, 07:44 PM #6
btw , thats all you got in it?? a grate and a 4" intake filter?
and the seagoated impeller??
thats good #'s for what is basically a stock ski!
what was the stock impeller supposed to be??
12-30-2008, 07:56 PM #7
12-30-2008, 09:25 PM #8
Glad you got out and got your ski off the limiter. Nice job, some times is comes in 1mph bits or less, but eventually it pays off.
Not to mention thats one time out.
So whats your first feel of the grate difference. You were running a stock (not cut) grate????
I saw you said something about cavitation now.
How would you say your acceleration felt???
Just testing you.
12-30-2008, 09:50 PM #9
I didn't really test for acceleration although I did nail it a time or 2 from idle.
Cavitation was noticeable for the first 2? ski lengths. Which made the hole shot feel limp and weak. Once on plane it was fine but most of my runs were from 50 to top end. Overall, I'm not impressed with the R&D so far. I've run 70.9 totally stock so 72.6 with a new grate, 4" filter, and the ride plate holes filled plus the repitched prop doesn't quite add up. But I am running faster then most other T's with the same or similar set-up so I won't bitch. My friends RXT w/wedge could only muster a 65.6 with the same gps unit (mine).
12-30-2008, 10:02 PM #10
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