06-26-2009, 07:36 PM #1
After X-Charger ( impeller or Nozzle )
I just check my RXT (2007) after last modification
The maximum RPM 7800 RPM Speed ( GPS 71.5 mph ) The boost 9 PSI !!
The Temperature was 109 F - sea level - water Temperature 89 F
X-Charger + ( Riva Washer )
Rotax R Thermostat
4" Air intak
XS InterCooler +Filter
Riva Pro Block off OPAS
Solas 15/20 ( out of box )
Riva 2 degree wedge
Wallbro fuel bump
Riva Water Box
oil - check the level is okay
The med range is Awesome ( Awesome acceleration )
i ask some professional
Some say : depitching your trailing edge of the impeller 2 mm
other Say : just machine the Nozzle to 86 mm
* i never depitching impeller before
* by the way what the original size for Stock RXT and RXP ??
Thanks in advance
06-26-2009, 07:39 PM #2
- Join Date
- May 2008
06-26-2009, 07:41 PM #3
06-26-2009, 07:59 PM #4
06-26-2009, 08:21 PM #5
06-26-2009, 10:46 PM #6
I wouldnt change stock nozzle to 86 mm as then you are stuck with 86 mm nozzle when it cools down. Better would be machine your nozzle to accept rings or you could get a pro nozzle. get rings from 81 to 85 and run a 85 and you might gain 100 rpm. THen when it cooled down you could put a 83 back in.
I think in your heat you need to take a little pitch out of prop and that would be my best reccomendation and run stock nozzle.
06-26-2009, 10:54 PM #7
06-26-2009, 11:00 PM #8
06-27-2009, 02:55 AM #9
Need to get the RPM up a little. It sounds like the impeller is loaded just a little too much.
Try a 14/19 solas, reduce the ring to 1mm less.
So there's the shopping list.....
Too hot for me mate, unless am on the water skiing..!
06-28-2009, 07:27 PM #10
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