Page 1 of 4 1 2 3 ... LastLast
Results 1 to 10 of 34
  1. #1

    Join Date
    Jul 2005
    Location
    Central North Carolina
    Posts
    3,847
    +1
    528

    Exclamation Are you getting the most speed out of your ski you can?

    After working on several Fzr/Fzs This is what I have came up with as far as BEST speed numbers. These speed numbers are based on IF you have air intake, exhaust, rideplate, water intake grate,prop/nozzle, ecm reflash or aftermarket ecm and all the normal things everybody does plus your ski is tuned correctly you are testing in good water conditions and running the ski as free as possible also............ stock sc wheel and no reflash= 73-74 mph add a reflash or aftermarket ecm 7-9 psi of boost= 76-79 mph, 10-12 psi of boost= 80-82 mph, 13-15 psi of boost= 83-85 mph, 16-18 psi of boost= 86-88 mph and over 18 psi of boost 89 mph and up depending on how much boost you can get. This is just what I have seen. Head porting , cam gears and camshafts can give you a even better speed at these boost numbers also. I know some of you are not getting these speed numbers but if everything is done correctly you should be close to these speeds. If you are running these speed numbers or better with that amount of boost then you have done a good job on your ski! If not you need to look and see where you are not getting the best out of your ski. These speed numbers will be less in hot and humid weather also. If you choose to run your ski tighter to the water your ski will be slower. Feel free to respond to this post if you like. Tommy Jordan
    Last edited by 2fast4u; 05-08-2011 at 04:56 PM.


  2. #2
    lets race.... mikeFZR's Avatar
    Join Date
    Mar 2009
    Location
    MA
    Posts
    4,134
    +1
    205
    Great info Tommy
    IMO it is not about putting the most parts on your ski, it's about tuning the ski and making the parts work for you. I think a lot of speed is lost in poor pump set ups on a lot of skis.

  3. #3
    hitman's Avatar
    Join Date
    Aug 2006
    Location
    Ft. Lauderdale, FL
    Posts
    4,328
    +1
    12
    Awesome post Tommy. I agree 100% with the expected speeds vs boost levels and all other supporting mods.

  4. #4
    YoYamma's Avatar
    Join Date
    Aug 2006
    Location
    Central Florida
    Posts
    21,591
    +1
    4,798
    Quote Originally Posted by 2fast4u View Post
    7-9 psi of boost= 76-79 mph, 10-12 psi of boost= 80-82 mph, 13-15 psi of boost= 83-85 mph, 16-18 psi of boost= 86-88 mph and over 18 psi of boost 89 mph....
    300 psi of boost =



  5. #5
    Quote Originally Posted by YoYamma View Post
    300 psi of boost =

    made me laugh, good start to my mourning. thanks for that.

  6. #6
    Kristian Keppel Waterholics's Avatar
    Join Date
    Apr 2010
    Location
    Trinidad & Tobago
    Posts
    1,405
    +1
    38
    I just wanna get some stuff straight her.
    Now I'm fairly new to the PWC world and I know with my mods I am no where near these speeds. So my question is how much MPH off should I be if I ride in 93* saltwater in closed course trim ???

  7. #7

    Join Date
    Jul 2005
    Location
    Central North Carolina
    Posts
    3,847
    +1
    528
    Quote Originally Posted by Waterholics View Post
    I just wanna get some stuff straight her.
    Now I'm fairly new to the PWC world and I know with my mods I am no where near these speeds. So my question is how much MPH off should I be if I ride in 93* saltwater in closed course trim ???
    with hot weather and a closed course set up you can easly deduct 3-5 mph off these max speed numbers.

  8. #8
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
    Join Date
    May 2008
    Location
    Houston
    Posts
    4,486
    +1
    320
    So 300 psi of boost makes your yamaha into a kawi with wings? That is a good mod!

    Sean

  9. #9

    Join Date
    Jul 2005
    Location
    Central North Carolina
    Posts
    3,847
    +1
    528
    Looking back at all my notes over the years of pwc info 80 mph was the magical speed everyone was trying to reach with a modded gpr. Now 80 mph on a sho/fz is a good baseline to start from . Amazing how the speeds have gained in just the past 2-3 years. Tommy Jordan

  10. #10

    Join Date
    Jul 2005
    Location
    Central North Carolina
    Posts
    3,847
    +1
    528
    ttt

Page 1 of 4 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. How do you get the intermediate shaft out of housing?
    By boostcrazy99 in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 06-30-2016, 08:49 AM
  2. Easiest way to get some more speed out of an RXT 260.
    By tomespo in forum 4-Tec Performance
    Replies: 16
    Last Post: 09-09-2015, 10:26 PM
  3. Are you getting the most speed out of your ski you can?
    By 2fast4u in forum Yamaha PWC Performance (4-stroke)
    Replies: 32
    Last Post: 01-21-2014, 02:26 PM
  4. 4-Stroke NY Fzr project. Trying to get as much speed out of fzr without engine mods
    By Champion Ed FZR in forum Yamaha Projects & Build Threads
    Replies: 38
    Last Post: 07-05-2012, 09:35 AM
  5. How do you get the trim box out of a '94 SS Xi?
    By TenTwelve in forum Kawasaki How To & FAQs
    Replies: 2
    Last Post: 06-13-2011, 10:56 PM

Posting Permissions

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