Page 1 of 4 1 2 3 ... LastLast
Results 1 to 10 of 37
  1. #1
    MR. SCOVILLE UNIT SUCKMYWAKE's Avatar
    Join Date
    Aug 2005
    Location
    ASTON, PENNSYLVANIA
    Posts
    2,836
    +1
    8

    ported throttle body alternative?

    found this site in one magazine at work
    www.ultimateperformanceparts.com
    check out the throttle body section

    FEATURES & INFORMATION

    Increases throttle response, gas mileage, & acceleration

    Installs in just minutes!

    Designed to produce power and torque throughout the RPM range

    A patent-pending design!

    Eliminates the need for a ported throttle-body by smoothing and reshaping the throttle-body entrance to increase the incoming air velocity at each given RPM


    The VR velocity stack was designed to reshape the factory throttle-body in order to boost air flow velocity at each given RPM. The overall shape of each VR velocity stack has undergone some of the most intensive airflow research that we have ever done to produce the best overall shape for each engine's airflow requirements. In order to achieve this we: Created a balanced airsteem between the upper and lower portion of the throttle-body blade = more airflow. We then changed the shape of the entrance to build up a higher velocity charge at each given RPM. This allows the intake charge force in the manifold to be increased = increased throttle response and added torque and power under the curve where you can use it. Streamlining the intake was also achieved by directing the air in a controlled fashion to reduce any power robbing turbulence over the AIR and PCV valve to maximize the overall efficiency of the factory throttle-body's overall diameter.Each velocity stack features a varied plenum volume whether in front of the throttle-body or in overall length to help them boost the primary and secondary pressure waves during the cylinder firing process = a tuned and more balanced induction system giving you much better overall combustion efficency = more power and better gas milage.

    In Truck applications we have seen gains of up to 22+ ft/lbs of tire-shredding torque throughout the power curve where you can use it! As tested in a 2004 Silverado 5.3 V8. In LS1 car applications, gains of up to 13 rear wheel HP have been seen (03 C5 Corvette).

    The all-new VR Velocity Stacks are the solution for the poorly designed GM throttle-bodies. Installation takes just minutes. Increase power output throughout the entire RPM range, improve throttle response and increase gas mileage! Available for all 1997-2004 C5 Corvettes, 1998-2002 LS1 F-Bodies and 1996-2004 GM V8 and V6 Trucks/SUVs.
    i wonder what the size difference is


  2. #2
    One day at a time..... N8R's Avatar
    Join Date
    Dec 2005
    Location
    TAMPA
    Posts
    3,716
    +1
    41
    Wiring and the efi limits 4 now.. it all makes sense hurry macboost or advent,,,Ross

  3. #3

    Join Date
    Apr 2006
    Location
    South MS
    Posts
    1,095
    I had one of those on my Silverado. Saw no gains, its about twice the size of the yamaha throttle bodies. If you look at it, it actually reduces the size of the bore. A ported throttle body alternative would be a set of 48mm carbs

  4. #4
    MR. SCOVILLE UNIT SUCKMYWAKE's Avatar
    Join Date
    Aug 2005
    Location
    ASTON, PENNSYLVANIA
    Posts
    2,836
    +1
    8
    thanks ron, that settles that

  5. #5
    Chrisrokc's Avatar
    Join Date
    Apr 2006
    Location
    Oklahoma City, OK
    Posts
    3,667
    I have used that product before on a 00 LS1. I lost power....

  6. #6
    Chrisrokc's Avatar
    Join Date
    Apr 2006
    Location
    Oklahoma City, OK
    Posts
    3,667
    To add onto that,

    I tried that once. Didn't work. But I did run a Ported SHANER s2 Throttle bodyie. It was basicly what Ross is doing to these on the GPR with out the stack. It gave better throttle response and about 4 or 5 hp.

    I tried a bigger manifold and tb setup than stock, LSX 78mm. I saw no gain untill I went ported heads and cam on that setup.


    So basicly my theory is


    On a GPR stock cubic inch and no porting. Ported stock will be just fine.

    Once you go ported bigger throttle bodies and intake system could help make more power.





    And also it says they have them for all those different cars... it is all the same throttle body basicly. The throttle body size is 75mm.

  7. #7
    One day at a time..... N8R's Avatar
    Join Date
    Dec 2005
    Location
    TAMPA
    Posts
    3,716
    +1
    41
    i still have alot of dialing in with the efi controller but, trying to work out the mystery bounce sh#t figured it out your not suppossed to try and superman in 6 in chop at or near 80 winds everyday 10-15-20 may have to make a road trip and find some of that fine glass over there in Orlando and maybye even jump a few gators

  8. #8
    If you look at it, it actually reduces the size of the bore. A ported throttle body alternative would be a set of 48mm carbs

    Yes, those have BS written all over them... They are selling an increase in velocity by reducing throttle body diameter.. No help there... My setup increases velocity with no reduction in T/B diameter. And dont forget, you are comparing 4 stroke to 2 stroke here... Simply cant do that..
    You are right about the 48s Ron but I am wondering what the 48s would be without triple pipes.. Arent they pretty much husband and wife?

  9. #9
    chuck's Avatar
    Join Date
    Nov 2005
    Location
    oak forest il
    Posts
    578
    I am wondering what the 48s would be without triple pipes.
    The fastest singlepipe gpr on this site

  10. #10
    DRC 4 LIFE TheDome's Avatar
    Join Date
    Aug 2006
    Location
    Bridge City, Texas
    Posts
    1,257
    +1
    18
    Are you guys talking about 48mm Blackjacks on a single pipe ski?

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. FS Ported throttle body $140 shipped SOLD!!
    By speedjunky787 in forum Sea Doo Classifieds
    Replies: 0
    Last Post: 08-11-2014, 02:50 PM
  2. SOLD 61mm Ported Throttle Body
    By Sayers in forum Sea Doo Classifieds
    Replies: 10
    Last Post: 09-23-2012, 07:20 AM
  3. SOLD Ported throttle body for FZR/SHO
    By kansasgpr in forum Yamaha Classifieds
    Replies: 8
    Last Post: 02-05-2012, 10:49 AM
  4. tested: rosnemos ported throttle bodies
    By txgp1300r in forum Yamaha PWC Performance (2-stroke)
    Replies: 21
    Last Post: 07-02-2007, 03:21 PM
  5. Ported throttle bodies
    By rossnemo in forum Yamaha PWC Performance (2-stroke)
    Replies: 89
    Last Post: 03-26-2007, 04:04 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
  •