Thread: Which skat trak for X
10-27-2008, 06:24 PM #1
Which skat trak for X
once again i need some helpful answers
heres the setup
ET-X 137 S/C, 60lb injectors, 8600 ecu, 84mm nozzle, 15/22r. im pushing out 14psi of boost and running a top speed of 78mph on a humid day with full take.
i know im in the 80mph but i ride on the bay so i will hardly ever use the top speed. i need acceleration. and i wish turbo was the answer but not yet. maybe one day.lol
question is which skat trak should i try?? 14/19, 14/18 (les cooke's one) or a 15/20. what are the closed course guys running?
10-28-2008, 04:01 AM #2
is anyone running a skat trak in there rxpx??
10-28-2008, 05:24 AM #3
Hi, i have one RXP-X with turbo system at 15Psi running with 14/19 skat and 215 nozzle,top RPM 8.750 and 123Km/h with a very good acceleration and almost nothing of cavitation..
10-28-2008, 05:51 AM #4
so then if only want a top rev at 8600 maybe go for the 15/20??
10-28-2008, 05:56 AM #5
Yes maybe, but depends for what are you looking for. With 14/19 you have a better holeshot, I have installed other skat 15/20 in other RXP (NO X) with turbo and my customer are running at 8.650RPM with 18Psi. and Riva ECU.
I think you have to try both impellers if you can and choose that you like more.
10-29-2008, 06:35 AM #6
any comments from the closed course race guys??? cheers
10-29-2008, 07:48 AM #7
I was running a 14/18 Skat-Trak 3-Blade at 8580 on my X. It ran about 69-70mph in race trim. I had heard that with a 3-Blade there is a flat spot in the acceleration and the X liked the 4-blade better. So I put in my stock x impeller and it's running 72-73mph in race trim.
I also compared the 3-blade and the stock x impeller in a short distance run(two tenths of a mile) and the 3-blade hit about 70 and the stock x impeller hit 71.5. RPMs at the time were 8580 for the 3-blade and 8200 for the stock x impeller.
10-29-2008, 12:51 PM #8
I think 14/18 is too smaller, maybe 14/19 with cone spacer and reduccion nozzle. But itīs only that i think. I didnīt test never 14/18.
For me personally i like more Solas 4 blade, in our racing boats we get a very good compromise between top end speed and aceleration without cavitation.
15/20 from Solas is one of the best impellers for me for close course.
10-29-2008, 01:37 PM #9
For my APBA Limited Class setup that was the pitch impeller Les Cooke suggested I get since I'm using a lot of his products on my X.
10-29-2008, 01:58 PM #10
Donīt get me wrong, i know Les Cook know a lot about performaces....
Only i,m suggestin other options. From my experience i think you need around 75Mph for close course but you need too get this speed instantly. Well i know itīs no easy, if this was easy everybody do it without problems.
Anyway i think each team or mechanical have his own way to do a good setup with differents options.
For me at the moment ( i donīt know if in a future i will change) i like too much more 4 blade impellers for 4 Tec Rotax engines.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By thetolleyman in forum Yamaha ClassifiedsReplies: 1Last Post: 03-28-2013, 02:30 AM
By BOUDHA in forum Sea Doo ClassifiedsReplies: 0Last Post: 02-23-2010, 07:51 AM
By BOUDHA in forum 4-Tec PerformanceReplies: 0Last Post: 02-23-2010, 07:51 AM
By Legdrag's in forum Kawasaki PWC Performance (4-stroke)Replies: 12Last Post: 04-23-2007, 12:13 AM
By Chezzy in forum 4-Tec PerformanceReplies: 22Last Post: 01-21-2007, 06:47 PM