Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 30
  1. #1
    BLACK MAGIC HEADERS hydrojunkie's Avatar
    Join Date
    Jun 2007
    Location
    new york
    Posts
    3,529
    +1
    3

    boost for rotax racing wheel

    what should i see as far as boost for a rr wheel. i have a sun pro boost gauge @ 7900 its 6 to 7 psi is the gauge wrong or leeking air somewere


  2. #2
    HOSS's Avatar
    Join Date
    Aug 2005
    Location
    Kenner, LA
    Posts
    4,759
    +1
    29

    Thumbs up

    One of the 2. I personnally wish I wouldn`t have given my RR wheel awayIf your staying with the stock intercooler, ecu and injectors,,it cant be beet! Now I`ve never even seen the green wheel so i cant say but from what I`ve read it would seem comparable or even better. 74 mph now on my friends 05 RXT. These are the mods,,and no bs! rr wheel, riva 3" intake, bone stock rxp prop, ride plate filled, riva intake grate(knifed), Riva catch can, reverse bucket carving, 2 degree wedge, strainer, metal washers, iridiums, lined up throttle blade, and I yanked the resonator. Average on glass is 74.6. Thats all the mods done. Just a completely reliable ski and faster than damn near most. Slower than a few. Oops,,,I flipped the wear ring. The ski NEVER breaks!

    I`m actually leaning towards another ski just to make this a flat water rocket (my `05 RXP). A Honda may be in the works for me,,,those things are light!

  3. #3
    AKA: Larry lafjax's Avatar
    Join Date
    Jul 2006
    Location
    Jacksonville, Fl
    Posts
    3,032
    Quote Originally Posted by HOSS View Post
    riva intake grate(knifed),
    Hoss, what does "knifed" mean, edges sharpened up? or wings cut off?

    I've got the mods below and can only reach 70.2 best.
    Last edited by lafjax; 08-03-2007 at 07:38 PM.

  4. #4
    HOSS's Avatar
    Join Date
    Aug 2005
    Location
    Kenner, LA
    Posts
    4,759
    +1
    29
    Yes,,,sharpenned and light material removed. I actually did alot to the "ramp" and shortenned them by about 1/4 inch. I know you dont wanna hear this but,,,can I give you a suggestion? I dont see ECU? If not, loose the 42`s. Next, for what you`ve got,,,the stock intercooler would be best. The S3 I found if you dont need off the line power for jumping waves,,,chit can it! For an RXT,,a bone stock RXP prop seems to work awsome. This was all done with GPS. I`m not a prop wizard but the stock RXP prop is the ticket,,at leat on this ski. He runs 93 from Chevron, all day long, its an `05 RXT,,best part is that its consistently dependable. Hell, I barely get to ride due to down time. This thing hits the 8150 mark at wot and stays pegged just like new. Not over propped or under. Just perfect as hell. Funny thing is he doesnt have VTS like all the RXP`s. This cat rocks from GO!

  5. #5
    AKA: Larry lafjax's Avatar
    Join Date
    Jul 2006
    Location
    Jacksonville, Fl
    Posts
    3,032
    Quote Originally Posted by HOSS View Post
    This thing hits the 8150 mark at wot and stays pegged just like new. Not over propped or under. Just perfect as hell. Funny thing is he doesnt have VTS like all the RXP`s. This cat rocks from GO!
    That's good information, I'll work on it some more...
    Thanks

  6. #6

    boost

    Quote Originally Posted by hydrojunkie View Post
    what should i see as far as boost for a rr wheel. i have a sun pro boost gauge @ 7900 its 6 to 7 psi is the gauge wrong or leeking air somewere


    i am getting around 9 at 8100 with xs and rear air

  7. #7

    Join Date
    Jun 2006
    Location
    toronto
    Posts
    965
    11.3 at 8550 at 80 degrees
    11.1 at 8550 at 90 degrees
    11.5 at 8550 at 70 degrees****

    ****only tried once.

  8. #8
    Moderator The Bandit's Avatar
    Join Date
    Jul 2006
    Location
    Wilmette, IL
    Posts
    8,373
    Quote Originally Posted by smc View Post
    11.3 at 8550 at 80 degrees
    11.1 at 8550 at 90 degrees
    11.5 at 8550 at 70 degrees****

    ****only tried once.
    Is that while riding superman?

  9. #9

    Join Date
    Jun 2006
    Location
    toronto
    Posts
    965
    No, I stand. Superman on Lake Ontario is one step short of death. Mark Underwood and I are trying to figure out why the boost is so high. At 8550 rpm the RR Wheel should push 10.7-10.8-10.9. I don't know what the wheel will do at around 8000, but your number seems low. There is a thread about 10 days ago trying to give numbers for all wheels.

  10. #10
    Quote Originally Posted by smc View Post
    11.3 at 8550 at 80 degrees
    11.1 at 8550 at 90 degrees
    11.5 at 8550 at 70 degrees****

    ****only tried once.
    You have to be running the spacer with the RR wheel to get those boost numbers.

Page 1 of 3 1 2 3 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. FS Complete Supercharger with Rotax Racing wheel and spacer
    By RXP-REX in forum Sea Doo Classifieds
    Replies: 8
    Last Post: 03-12-2009, 11:37 AM
  2. Rotax Racing Wheel
    By dave911rsr in forum 4-Tec Performance
    Replies: 1
    Last Post: 04-28-2008, 08:48 PM
  3. stg 3 and rotax racing wheels results
    By DIGGS in forum 4-Tec Performance
    Replies: 21
    Last Post: 07-17-2007, 05:55 PM
  4. Reflash to newer program for Rotax Racing ECU
    By Green Hulk in forum 4-Tec Performance
    Replies: 67
    Last Post: 01-08-2006, 03:41 PM
  5. More Air for Rotax Racing mods?
    By Jarrett in forum 4-Tec Performance
    Replies: 4
    Last Post: 05-31-2005, 10:46 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •