Page 1 of 4 123 ... LastLast
Results 1 to 10 of 31
  1. #1
    Redrockat's Avatar
    Join Date
    May 2015
    Location
    South Africa
    Posts
    265
    +1
    23

    Seadoo 300 Riva xxx supercharger boost

    What boost are you seeing from this supercharger on data logging ? Iím at high altitude ď4500ftĒ but not really seeing that high boost .


  2. #2
    DooX's Avatar
    Join Date
    May 2015
    Location
    S.W. Ontario
    Posts
    271
    +1
    7
    Quote Originally Posted by Redrockat View Post
    What boost are you seeing from this supercharger on data logging ? I’m at high altitude “4500ft” but not really seeing that high boost .
    What rpm are you at?

  3. #3
    www.eastcoastpwc.net Scott's Avatar
    Join Date
    Jul 2007
    Location
    NJ
    Posts
    8,755
    +1
    591
    Quote Originally Posted by DooX View Post
    What rpm are you at?
    ^this

    And is this 142mm Charger?

  4. #4
    Redrockat's Avatar
    Join Date
    May 2015
    Location
    South Africa
    Posts
    265
    +1
    23
    Hi Iím currently at 8620rpm and yes itís the 142mm wheel . Running it in a rxtx 260 2010 . Not really making speed out of this . Boost is at 13.9-14.1 on the old data logger ...

  5. #5

    Join Date
    Jun 2017
    Location
    Kuwait
    Posts
    49
    +1
    4
    You might have a boost leak

  6. #6
    www.eastcoastpwc.net Scott's Avatar
    Join Date
    Jul 2007
    Location
    NJ
    Posts
    8,755
    +1
    591
    Quote Originally Posted by Redrockat View Post
    Hi Iím currently at 8620rpm and yes itís the 142mm wheel . Running it in a rxtx 260 2010 . Not really making speed out of this . Boost is at 13.9-14.1 on the old data logger ...
    Iím going to assume you modified the pto to fit the 300 charger since the ski is a 2010

  7. #7
    Redrockat's Avatar
    Join Date
    May 2015
    Location
    South Africa
    Posts
    265
    +1
    23
    Yes all the mods done to fit the charger .

  8. #8
    Water4fire's Avatar
    Join Date
    May 2005
    Location
    New Braunfels TX.
    Posts
    10,391
    +1
    880
    MY 135XX made more than that.

  9. #9
    Banned User
    Join Date
    Jun 2007
    Location
    My House
    Posts
    4,108
    +1
    335
    At 4000 ft above sea level we need to figure out what 40.8% greater than ambient is. 12.7 X1.408 = 17.88 psi absolute. Thatís a loss of 13.624% pressure from sea level. This is what a mechanically driven supercharger will yield if it is designed to provide 40.8% more air (6 psi at sea level)


    At 5000 ft above sea level we need to figure out what 40.8% greater than ambient is. 12.23 X 1.408 = 17.22 psi absolute. Thatís a loss of 16.81% pressure from sea level. This is what a mechanically driven supercharger will yield if is designed to provide 40.8% more air (6 psi at sea level).




    https://www.rx8club.com/series-i-tec...ressure-52371/

    these example figures I found based on sea level psi boost pressure of 6 psi in this post but should b relevant in theory.... it looks to me & this seems to confirm the higher u go the less air their obviously is so it takes more to do the same hence the psi % loss as u go higher & higher.......so maybe u r not down its just altitude..........Good Luck!!!

  10. #10

    Join Date
    Jul 2005
    Location
    Lake Dunlap, Texas
    Posts
    1,616
    +1
    38

    Reid is right on.

Page 1 of 4 123 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. SOLD Riva XXX supercharger for 185/215/255/260 engine
    By toxicgun in forum Sea Doo Classifieds
    Replies: 4
    Last Post: 03-21-2018, 05:53 PM
  2. FS - Parts Riva XXX Supercharger
    By JP_RACING_INC in forum Sea Doo Classifieds
    Replies: 1
    Last Post: 10-03-2017, 07:14 PM
  3. FS - Parts ***Brand New (batch 2) Seadoo 300 RIVA Solas 13/18r impeller*** $150
    By Jwall in forum Sea Doo Classifieds
    Replies: 19
    Last Post: 05-06-2017, 03:25 PM
  4. FS - Parts Seadoo 300 riva intercooler piping brand new in the box
    By WICKEDSEADOO in forum Sea Doo Classifieds
    Replies: 3
    Last Post: 12-05-2016, 10:46 PM
  5. The Riva XXX Supercharger With Closed Loop Cooling??
    By switchblade in forum 4-Tec Performance
    Replies: 18
    Last Post: 03-30-2014, 04:18 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
  •