Thread: Need a little help please...
09-06-2006, 05:24 PM #1
Need a little help please...
I need a little help please. ’04 GTX-SC 3-seater couch, 66 hours.
At 30 hours I was running 64-64 mph on the ski speedo, rpm not available. (Yep, not accurate.)
I installed Riva Blow off valve.
I installed Riva Power Filter and my dealer installed the metal washers.
Speed went down to 56.4 on gps @7250. (57-58 on ski speedo)
I was disappointed with this. I know I should be getting more with the filter.
Could the washers be installed wrong?
I tore up my impeller and wear ring with rocks.
Replaced ring and impeller with Solas 13/20R, added a 2.25 wedge, Riva OPAS Competion Kit, Riva gate. All installed carefully per Jerry’s instructions. Installation went fine.
My speed now is 57.4 - 58.6 on gps @ 7250 rpm (59-60 on speedo).
Shouldn’t I get more from this setup. After reading the gains you fellows get here I am disappointed in my results. I wanted 65…
Shouldn’t the ski run up at least 8100 rpm’s.
Appreciate your comments…it’s fast but not as fast as I hoped,
Pluses, hole shot is unbelievable with the new prop and ring.
Last edited by lafjax; 09-06-2006 at 05:42 PM.
09-06-2006, 05:39 PM #2
your ski will only run 7600-7650 rpms at it's peak performance
13/20 may be too much pitch for your mods... i know riva recommends a 12/20 with their GTX SC stage 1
how is acceleration? improved or kinda laggish?
i'd say 1 of two things.... supercharger needs shims for proper torque specs or the prop is not yet dialed in with the correct pitch.
09-06-2006, 05:44 PM #3Originally Posted by Shibby1485
Acceleration is super....I have to really hold on.
09-06-2006, 05:46 PM #4
- Join Date
- Oct 2005
Shibby is correct
You need an ECU to get that couch to 8100 R`s...PR...
09-06-2006, 06:52 PM #5Originally Posted by Pale Rider
09-06-2006, 08:12 PM #6
- Join Date
- Jul 2005
- Lake Dunlap, Texas
Get all your upgrades from GreenHulk.
09-06-2006, 08:29 PM #7
i dont think u need an ECU personally, that's not what i was saying... was just clarifying that ur stock ECU is not capable of 8100 like an RXP/T
if u wish to attain 65 mph, it should be feasible with your stock ECU no problem... the setup to run 63-64 is already there, we just gotta find wtf is messed up
it COULD be the SC needing a shim
there's definitely 2-3 mph left in the rpms your missing.
your blow off valve could be leaking?
09-06-2006, 09:05 PM #8
I'm in the same situation. 04 GTX SC 22 hrs. Installed Riva cold air kit, Riva wedge, Riva Bent Concord impeller, stock grate and opas blocked up. 62.5 @ 7500 RPM's.
Now I did suck a rock before I GPS'd it. I got lucky just a ding on one trailing edge, bent it back tonight, new wear ring.
Got 63.8 on GPS last season @ 7650 RPM's stock with block ups.
I think it's in the impeller.
09-06-2006, 09:36 PM #9Originally Posted by Shibby1485
Ride plate holes filled...
I guess I'll have to pull the SC and check the torque on the nut. 10 hours with new metals should still be in good shape.
09-06-2006, 09:55 PM #10
are the blowoff valve deals a rip off or do thay actually help??
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