Thread: Prop and nozzle tunning
10-24-2011, 01:08 PM #1
Prop and nozzle tunning
If my ski is turning 8250 and I want to drop 100 rpms to gain mph what would be the better route?
- pitch the prop
- put a smaller nozzle?
which would result in a higher mph?
On other ski's i understand that smaller nozzles make you loose holeshot/acceleration, but honestly on these rxpxs the hole shot rocks no matter what!
10-24-2011, 01:14 PM #2
10-24-2011, 01:40 PM #3
Just want to know what usually yields more gains - pitching the prop or changing the nozzle?
modded stock waterbox, free flow and rear exit exhaust
4 inch kanaflex
flame arrestor removed
some type of supercharger upgrade (seller said it was a rude but i dont know)
10-24-2011, 01:45 PM #4
You will see better Gaines by pitching your prop.
10-24-2011, 01:59 PM #5
Prop will result in larger difference.
The reason i asked what ecu, is that you are on the limiter at 8,250 rpm and X ecu.
You asked which will result in higher rpm, you do not want to go higher rpm with that ecu.
10-24-2011, 02:23 PM #6
10-24-2011, 02:25 PM #7
10-24-2011, 03:06 PM #8
I've read 81 nozzle is smallest to go.. from there repitch. I have not tested this it is only what I read.
10-24-2011, 03:21 PM #9
On my RXP I prefer oem nozzle or 83 ring, as the 81 seems to dog the motor and hurt acceleration IME.
On the T-X I liked the 84 ring. Even the 85 worked good.
I might have gave up a tiny bit up top but holeshot, acceleration and handling were much better. It takes a big prop in good air to stay off limiter but worked great on the T-X.
Just the way I roll!
10-24-2011, 03:39 PM #10
aren't most of the guys with the x boats only going as small as 83mm
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