03-05-2012, 03:47 PM #1
need help acceleration and top speed between 15/20 and 15/22
Hi top riders from the usa
My friend did a race yesterday with a rxtx 260 homemade flaps, my supercharger (et 68/140) aftermarket admission, aftermarket lemoine ecu 8700rpm, riva valve train.
The problem is that he has on his ski a solas 13/18. From reading on you're all experience and from what I saw during the race I found that the solas 13/18 give him good acceleration but low top speed. He was like 116km/h on speedo with rrpfr at 45 psi and stock injectors.
It appears that on the greenhulk store, when you buy a Vtech ecu with 8800rpm they preconize you to buy the solas 15/22.
My question is: if he put the 15/22 will he gain top speed compare to the 13/18 and will he loose or gain acceleration? he doesn't want to loose acceleration and the races he does are mainly OFFSHORE.
Can you please help me?
03-05-2012, 03:52 PM #2
Any ski turning 8100 or more we recommend the 15/20R impeller.
For the stage 1 tune and stock boost levels the 15/22R is recommended for 2010 and older skis and 15/20R is recommended for 2011 skis due to the difference in nozzle sizes.
03-05-2012, 03:54 PM #3
oups my bad.... But compare to the 13/18 will he gain top speed ? and acceleration on the rxtx 260?
03-05-2012, 03:57 PM #4
can a moderator change the title of the thread for me 15/22 to 15/20R thanks I appreciate
03-05-2012, 04:04 PM #5
A 13/18 doesn't sound tall enough to me for your setup. What rpms are you turning?
If you go to the 4 blade you will definitely pick up top speed but you will sacrifice some hole shot.
03-05-2012, 04:11 PM #6
03-05-2012, 04:13 PM #7
the thing is that I have a 15/20 on my ski so he wants to try it but it's a 3 blade not 4... so I don't know if it's going to be good skat trak 15/20 on a rxtx 260
03-05-2012, 04:14 PM #8
- Join Date
- Oct 2007
03-05-2012, 06:58 PM #9
As I thought, he's on the limiter with that prop. He could add pitch to his prop and pick up some more speed, but it will still be a few mph behind a 4 blade. My ski has similar mods and runs a skat 15/19 +1 mm and runs 120km/h @ 8520.
03-05-2012, 07:26 PM #10
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