Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13
  1. #1
    JROD06's Avatar
    Join Date
    Mar 2014
    Location
    Mobile, AL
    Posts
    51
    +1
    3

    2014 fzr svho impeller

    Was curious if anyone has done any testing of impellers on the new svho fz ski. I have been an avid reader of GH and decided to join now so maybe I can make a contribution since I have a new ski that I am beginning to mod. currently I have done the power filter and intake upgrade at the 2.5hr mark. I am going to wait till they have a true flash for this ski before I proceed there but was wondering if a different prop would get me more RPM or if it will just be tuned back by the ECU. Also I have noticed that I will get approx. 7800rpm for maybe 10 sec and then it drops off to 7300ish is this part of a 10hr break in or will that always be there. I can blip the throttle and it will jump back to 7800 for another 10sec or so and then fall off again. thanks for any help


  2. #2
    zone5's Avatar
    Join Date
    Feb 2013
    Location
    West of Blue Mountains, Australia
    Posts
    373
    +1
    36
    I understand that the rpm behavior is part of the way Yamaha do the speed limiting.

  3. #3
    wotxxxsd's Avatar
    Join Date
    May 2012
    Location
    Orlando
    Posts
    3,928
    +1
    472
    Welcome aboard the Hulk...

    I see you've already caught the mod bug...

  4. #4
    JROD06's Avatar
    Join Date
    Mar 2014
    Location
    Mobile, AL
    Posts
    51
    +1
    3
    Thanks,

    and yes I already have a 2012 VXR that is slightly modded but told the wife as soon as it was paid off she could have it cause I was stepping up, so needles to say the day I payed it off was the same day I purchased the FZ.

  5. #5
    mike1706's Avatar
    Join Date
    Dec 2008
    Location
    ,Florida
    Posts
    1,691
    +1
    16
    With a tiny tach this yamaha 2014 turns 7680 rpms and then go down to 7280 and i did run 70.9 to 70.2 mph the ski is bone stock.

  6. #6
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Quote Originally Posted by JROD06 View Post
    was wondering if a different prop would get me more RPM or if it will just be tuned back by the ECU.
    The ECU's limiter will just bump it back down to 7300. You will need a reflash before you can get any significant gains out of this ski.

  7. #7
    JROD06's Avatar
    Join Date
    Mar 2014
    Location
    Mobile, AL
    Posts
    51
    +1
    3
    Well I know with boat props SPEED = (RPM/GEAR RATIO)*(PITCH/1056)-%SLIPAGE so I guess what I am really wondering is if I go from a 14/20 pitch to a 14/23 shouldn't I pick up some speed from the larger pitch even if I'm held at 7300rpm, because the motor should have plenty of power to push the 23 or maybe even larger. I know a pump wont have a gear ratio like outboards do but should be similar concept correct? thanks for any input as I am new to this with impellers but have done it a lot with outboards as we own a boat dealership here locally.

  8. #8
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Quote Originally Posted by JROD06 View Post
    Well I know with boat props SPEED = (RPM/GEAR RATIO)*(PITCH/1056)-%SLIPAGE so I guess what I am really wondering is if I go from a 14/20 pitch to a 14/23 shouldn't I pick up some speed from the larger pitch even if I'm held at 7300rpm, because the motor should have plenty of power to push the 23 or maybe even larger. I know a pump wont have a gear ratio like outboards do but should be similar concept correct? thanks for any input as I am new to this with impellers but have done it a lot with outboards as we own a boat dealership here locally.
    I wish i were that easy, but not the way it works with a jet pump that's spinning on a 1:1 ratio with the engine.
    If you go with a 23 pitch then you won't be held at 7300 RPM when the limiter kicks in.... it will be more like 7000 RPM.
    With these jet pumps RPM = Speed. Give up 300 rpm you are giving up 2.5-3 mph.

    Not only that, running an impeller that's pitched too high will cause the ski to feel sluggish.

    It's very important with a jet pump that the impeller is perfectly matched to the mods on the ski and in the case of the SVHO Yamaha nailed the pitch perfectly. The stock pitch impeller is also working great on a ski running a reflash.

  9. #9
    mike1706's Avatar
    Join Date
    Dec 2008
    Location
    ,Florida
    Posts
    1,691
    +1
    16
    Quote Originally Posted by JROD06 View Post
    Well I know with boat props SPEED = (RPM/GEAR RATIO)*(PITCH/1056)-%SLIPAGE so I guess what I am really wondering is if I go from a 14/20 pitch to a 14/23 shouldn't I pick up some speed from the larger pitch even if I'm held at 7300rpm, because the motor should have plenty of power to push the 23 or maybe even larger. I know a pump wont have a gear ratio like outboards do but should be similar concept correct? thanks for any input as I am new to this with impellers but have done it a lot with outboards as we own a boat dealership here locally.
    Jrod06 are you hitting red line with the ribbon deleted , and power filter ? I think you should go with a 14/22

  10. #10
    fx160's Avatar
    Join Date
    Nov 2005
    Location
    gold coast australia
    Posts
    2,409
    +1
    193
    It's an artificial red line
    So it will always be on it

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 2014 FZR SVHO $16100 Ski Only
    By YamahaManny in forum Yamaha PWC Performance (4-stroke)
    Replies: 71
    Last Post: 04-06-2014, 08:03 PM
  2. FS 2014 fzr svho parts
    By shrabber in forum Yamaha Classifieds
    Replies: 10
    Last Post: 04-05-2014, 06:26 PM
  3. 2014 fzr svho vs 2014 fx svho
    By thereturn in forum Yamaha PWC Performance (4-stroke)
    Replies: 27
    Last Post: 04-05-2014, 04:12 PM
  4. The 2014 FZR SVHO invading the bayous of South Louisiana!
    By GH Forums in forum The Watercraft Journal
    Replies: 6
    Last Post: 12-18-2013, 07:47 AM
  5. Got the chance to ride the ALL NEW 2014 FZR SVHO
    By BAYOU FZR in forum Yamaha PWC Performance (4-stroke)
    Replies: 9
    Last Post: 10-10-2013, 03:32 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
  •