Page 1 of 2 1 2 LastLast
Results 1 to 10 of 11
  1. #1
    Dirty Sanchez's Avatar
    Join Date
    Dec 2005
    Location
    Northern Virginia
    Posts
    1,038

    Nemo TB test results- Thanks Ross

    Today was hot and humid. Not the air quality, but I decided to get off my butt and try out Ross Nemo's Taper Bore Throttle body Mod

    I warmed up my ski for 15 minutes to heat up the engine. It was hot and very humid!
    My tests were completed back to back with in 20 minutes of both runs on 3 bars of fuel on smooth water in my local lake

    My monitored 3 base line runs for rpms, over all acceleration in the bottom, mid and full throttle and peak speeds per my Garmin 305 Forerunner GPS

    Air Temperature degrees F 89degree's
    Altimeter Setting inches Hg 29.92
    Dew Point degrees F 69
    Altitude feet 250

    Relative Horsepower 97.5%

    Normally my relative HP runs between 99 & 108%

    My peak rpms for the un modded TB was 8400rpm's and 1/3 - 1/2 mile down the run and then faded to 8320-8350

    I quickly swapped to the modded TB, warmed the motor up fully and road back to the same testing site.

    Over throttle responses felt improved. Pulling harder and getting up to speed slightly quicker
    I definitely could feel a bottom end pull difference.

    My peak rpms with the modded TB was 8450 and held at 8400 mostly and would flicker slightly below at times.

    Like I stated earlier the air quality wasn't that great compared to the usual conditions

    Speed I picked up 6/10th or .6 mph with a heat soaked motor, 85 degree water temp, high humidity & dew point.

    Over all I'm very happy with the results. Maybe if it wasn't so hot & humid I would see better results. I donít really know Ross Nemo, so this isn't a solicited plug. Quality and turn around time was good and yes I would recommend this mod. I got .6 mph gain in the heat on an RXT. Nice work Ross and thanks for sharing this mod!


  2. #2
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
    Join Date
    Aug 2007
    Location
    Tampa Bay, FL
    Posts
    9,202
    +1
    673
    Ross is the man

  3. #3
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
    Join Date
    Nov 2005
    Posts
    6,194
    +1
    536
    Great back to back testing Chris, Yes Ross does excellent work.

  4. #4
    rxpredviper's Avatar
    Join Date
    Feb 2009
    Location
    WPB
    Posts
    2,248
    +1
    62
    Quote Originally Posted by Dirty Sanchez View Post
    Today was hot and humid. Not the air quality, but I decided to get off my butt and try out Ross Nemo's Taper Bore Throttle body Mod

    I warmed up my ski for 15 minutes to heat up the engine. It was hot and very humid!
    My tests were completed back to back with in 20 minutes of both runs on 3 bars of fuel on smooth water in my local lake

    My monitored 3 base line runs for rpms, over all acceleration in the bottom, mid and full throttle and peak speeds per my Garmin 305 Forerunner GPS

    Air Temperature degrees F 89degree's
    Altimeter Setting inches Hg 29.92
    Dew Point degrees F 69
    Altitude feet 250

    Relative Horsepower 97.5%

    Normally my relative HP runs between 99 & 108%

    My peak rpms for the un modded TB was 8400rpm's and 1/3 - 1/2 mile down the run and then faded to 8320-8350

    I quickly swapped to the modded TB, warmed the motor up fully and road back to the same testing site.

    Over throttle responses felt improved. Pulling harder and getting up to speed slightly quicker
    I definitely could feel a bottom end pull difference.

    My peak rpms with the modded TB was 8450 and held at 8400 mostly and would flicker slightly below at times.

    Like I stated earlier the air quality wasn't that great compared to the usual conditions

    Speed I picked up 6/10th or .6 mph with a heat soaked motor, 85 degree water temp, high humidity & dew point.

    Over all I'm very happy with the results. Maybe if it wasn't so hot & humid I would see better results. I donít really know Ross Nemo, so this isn't a solicited plug. Quality and turn around time was good and yes I would recommend this mod. I got .6 mph gain in the heat on an RXT. Nice work Ross and thanks for sharing this mod!
    ok thas a good mods but make sure you put locktite on the 2 bolts in the flap recoment ! because thos screw will get loose and will go inside the intake a happent to me and if this happen in full speed is not funny the flap will move from the position and will get stock at full speed !

  5. #5
    Great job with all the numbers Chris...It looks pretty consistent with others results, top end gains in the 50-80 rpm range.. I just took a call from another tester in miami that loves the low and midrange power gains more than the top end gains.
    Thanks for all the testing time spent.. By the way, a dewpoint of 69 is low for us here in florida, all week last week we had dewpoints in the 79-81 range! Worst i had ever felt here..

  6. #6
    It should be said also, there are varying degrees of casting and transition irregularities in the seadoo throttle bodies. Earlier versions use a steel shaft and very long screws that are nothing short of nasty. The later versions use a brass shaft with cleaner screws but have an oiler spigot that gets in the way of airflow. All of them have problems near the blade on the housing front and rear sides.
    These varying degrees of differences play a role in what each individual gain will be.

  7. #7
    Dirty Sanchez's Avatar
    Join Date
    Dec 2005
    Location
    Northern Virginia
    Posts
    1,038
    Still 80rpms +- is no joke. Espically, with the affordable price and quality workmanship. I'll be getting another one done in the future for sure!

  8. #8
    Gus13letter's Avatar
    Join Date
    Apr 2008
    Location
    Tampa Bay, FL
    Posts
    8,136
    +1
    822
    Nice back to back. I did testing within couple days of each other and although the 2nd day was a little worse air quality I still also noticed better holeshot, faster accelaration, and fatser top speed. My results are here http://www.greenhulk.net/forums/showthread.php?t=95457

  9. #9
    Water4fire's Avatar
    Join Date
    May 2005
    Location
    New Braunfels TX.
    Posts
    10,064
    +1
    790
    Chris can you post his contact info.?

  10. #10
    Duke's Avatar
    Join Date
    Jul 2006
    Location
    Florida
    Posts
    10,004
    +1
    406
    Quote Originally Posted by Dirty Sanchez View Post
    Today was hot and humid. Not the air quality, but I decided to get off my butt and try out Ross Nemo's Taper Bore Throttle body Mod

    I warmed up my ski for 15 minutes to heat up the engine. It was hot and very humid!
    My tests were completed back to back with in 20 minutes of both runs on 3 bars of fuel on smooth water in my local lake

    My monitored 3 base line runs for rpms, over all acceleration in the bottom, mid and full throttle and peak speeds per my Garmin 305 Forerunner GPS

    Air Temperature degrees F 89degree's
    Altimeter Setting inches Hg 29.92
    Dew Point degrees F 69
    Altitude feet 250

    Relative Horsepower 97.5%

    Normally my relative HP runs between 99 & 108%

    My peak rpms for the un modded TB was 8400rpm's and 1/3 - 1/2 mile down the run and then faded to 8320-8350

    I quickly swapped to the modded TB, warmed the motor up fully and road back to the same testing site.

    Over throttle responses felt improved. Pulling harder and getting up to speed slightly quicker
    I definitely could feel a bottom end pull difference.

    My peak rpms with the modded TB was 8450 and held at 8400 mostly and would flicker slightly below at times.

    Like I stated earlier the air quality wasn't that great compared to the usual conditions

    Speed I picked up 6/10th or .6 mph with a heat soaked motor, 85 degree water temp, high humidity & dew point.

    Over all I'm very happy with the results. Maybe if it wasn't so hot & humid I would see better results. I donít really know Ross Nemo, so this isn't a solicited plug. Quality and turn around time was good and yes I would recommend this mod. I got .6 mph gain in the heat on an RXT. Nice work Ross and thanks for sharing this mod!
    Did you have the TPS checked on both TBs?? Usually I have to have them reset to the ECU with the BUDDS software when changing. If its off it can slightly lean or richen the fuel curve and screw up results. However 80 rpms are great for such a small mod!!

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. Replies: 5
    Last Post: 11-27-2010, 10:13 PM
  2. Ross Nemos TB testing
    By WATER WOODY in forum Mudbug Nationals PWC.Life Rally
    Replies: 17
    Last Post: 06-11-2007, 09:20 PM
  3. 05 RXP TEST RESULTS
    By RXPNJ in forum 4-Tec Performance
    Replies: 16
    Last Post: 05-21-2005, 08:24 PM
  4. Today's test results 5/9/05
    By Jrsrxp in forum 4-Tec Performance
    Replies: 12
    Last Post: 05-10-2005, 01:32 PM
  5. My Mods and test results
    By CRAZEDRXP in forum 4-Tec Performance
    Replies: 14
    Last Post: 05-05-2005, 07:38 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
  •