Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13
  1. #1
    ksalles's Avatar
    Join Date
    Jun 2009
    Location
    Slidell, La.
    Posts
    1,786
    +1
    304

    V-Tech Stage III results

    It's been a while that I've had the V-Tech Stage III on my ski and I wasn't quite sure I was ready to endorse it just yet from my past experiences with it. I even tried another flash in effort to solve my problem. I searched online here and have yet to find really any proving results...which led me to be even more skeptical. Now I can tell you from my experience...the tune WORKS.

    As seen in this topic, I questioned the routing of the reference lines to the BOV, FPR and boost gauge all tapped off of the stock MAP sensor reference. With that said, I wasn't quite ready to settle with what I was experienceing. After the changes I made, the V-Tech has my 100% approval. This topic will explain it in detail the changes I made that allowed me to finally voice my opinion. Here is the topic I posted regarding it... http://www.greenhulk.net/forums/showthread.php?t=170149

    Well today I was able to test the ski after the changes were made. NIGHT AND DAY difference regarding how the ski responded to not only the tune, but the reference line solution as well. Prior to making these changes, my air fuel would vary from run to run and day to day and I was always questioning the tune. My rpms would fluctuate and I was looking for my source of loss power...getting frustrated to be quite honest. I was constantly adjusting the fuel pressure regulator trying to dial in the AFR's, which seemed impossible and changing constantly under boost.

    Since I made the changes the AFR is rock solid and the ski reponds unbelievably different that what it did before. It literally feels like it could sling you off the back or dislocate something if you're not prepared for it. I locked the regulator at 52psi ran it rising rate and launched the ski. Where at this psi before, my AFR was all over the place. Mostly in the 12's under full boost. The ski idles high twelves low 13's, all in vacuum it moves to the mid to low 13's, as soon as it's under boost it drops to low 12's up to about 5lbs then the AFR progressively gets lower with boost. Roughly 15psi on the ET15.5 at WOT I was seeing 11.4-11.7 . As soon as the ski gets near 8lbs the AFR locks in the mid 11 range and stays rock solid. This is all strictly the V-Tech, no powershot etc.

    I wasn't able to get any friends to go with me and the area I rode really doesn't have any boat traffic so I locked the ski down with the tabs for my own safety and went by myself. I can honestly say this is the first time I really came away really seeing the ski's potential as a result of it's consistency now. With the boat locked down, near 80% humidity I made a few quick hits. The ski ran 92.9mph sitting straight up on the seat at roughly 8500rpm. I know I can drop fuel pressure and run a little leaner, pull the tabs up some and change nozzles now and gain some respectable mph. I have a couple other changes being made in the near future that should really help the boat with speed. It's been 94.3mph in good air with the old setup and this V-Tech tune before it was ever really right. I think just in the same conditions with the setup now it should easily surpass that. With the changes coming, I would disappointed if it never ran a noticeable amount faster. I feel sure this stock SHO motor and GPR hull combination can run some big mph once I get it dialed in.

    With all that said...I just wanted to put it out there for Jerry, Josh and the guys at V-Tech now that I see how well the ski performs and how much potential it now has with this tune. I won't lie, I had my doubts and was getting frustrated. There is not a doubt in my mind now that this tune will be the tune I continue to chase my quest for mph with.

    Here is the video I made regarding the changes and routing of the reference lines.

    I feel the R&D multiport adapter is a neat item and works great with a FPR and boost gauge. However, I do not suggest it to reference the BOV, MAP sensor, FPR and boost gauge. Whether or not it's working or worked for guys in the past, I can tell you from my experience that the stock 4mm supply line cannot efficiently reference all my equipment effectively off of one small vacuum/manifold pressure source.

    Again, thanks to Jerry, Josh and the guys with V-tech to work so much with me with this tune. I couldn't be more pleased at this point with their dedication and trying to tailor it to my needs. I have to say, it all came back to how the tune was initially setup by V-tech that gave me the best and most consistent results.


  2. #2
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    25,930
    +1
    1,407

  3. #3
    Addicted Member 5001craig's Avatar
    Join Date
    Jul 2007
    Location
    Northeast Indiana
    Posts
    2,924
    +1
    11
    Sweet! And at 8500.

    I want one.

  4. #4
    hitman's Avatar
    Join Date
    Aug 2006
    Location
    Ft. Lauderdale, FL
    Posts
    4,328
    +1
    12
    Glad you got it all figured out buddy. I only run my boost pressure sending unit off the R&D distribution block. I tapped the manifold for the reference line to the BOV.

  5. #5
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
    Join Date
    Nov 2005
    Posts
    6,194
    +1
    536
    awesome.

  6. #6
    STALKER FZR's Avatar
    Join Date
    May 2011
    Location
    Smyrna, Delaware, United States
    Posts
    424
    Glad you got it figured out. I am currently using the R&D Multi-port adaptor for my boost gauge and BOV....Everything has been working fine, but it looks like I will be tapping the manifold when it comes out for my IC install, just to be safe. Good work. Thanks!

  7. #7
    RichieFZR's Avatar
    Join Date
    Jan 2010
    Location
    Gold Coast, Queensland, Australia
    Posts
    2,093
    +1
    4
    Nice work champion!!!

    Ive got a Stage 4 Vtech waiting for use in my GPR SHO.

  8. #8
    ksalles's Avatar
    Join Date
    Jun 2009
    Location
    Slidell, La.
    Posts
    1,786
    +1
    304
    Quote Originally Posted by JIM'S PERFORMANCE View Post
    awesome.
    Thank you Jim. Good luck with your progress on your rebuild. The color scheme and graphics look awesome.

    Quote Originally Posted by RichieFZR View Post
    Nice work champion!!!

    Ive got a Stage 4 Vtech waiting for use in my GPR SHO.
    You'll be pleased...best of luck with your build as well. Again, don't hesitate to get with me if you have any more questions.

  9. #9
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Very good results Keith. I'm glad you got it sorted out. Josh should have told you long ago to drill/tap for the BOV port

  10. #10
    RichieFZR's Avatar
    Join Date
    Jan 2010
    Location
    Gold Coast, Queensland, Australia
    Posts
    2,093
    +1
    4
    Quote Originally Posted by ksalles View Post
    Thank you Jim. Good luck with your progress on your rebuild. The color scheme and graphics look awesome.

    You'll be pleased...best of luck with your build as well. Again, don't hesitate to get with me if you have any more questions.
    Thanks heaps Champion , your help is the best!

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. FZS SVHO V Tech Stage 2 results.
    By FPV TRANNY in forum Yamaha PWC Performance (4-stroke)
    Replies: 3
    Last Post: 09-17-2016, 09:35 AM
  2. Riva V-Tech Stage 1 results
    By VdeKock in forum Yamaha PWC Performance (4-stroke)
    Replies: 1
    Last Post: 06-03-2016, 05:24 PM
  3. FS - Parts FZ ECU V-Tech Stage III & Intercooler
    By smitch in forum Yamaha Classifieds
    Replies: 1
    Last Post: 05-10-2015, 05:34 PM
  4. RIVA STAGE II Result AND GOING for STAGE III
    By qatar2000kk in forum 4-Tec Performance
    Replies: 17
    Last Post: 04-26-2007, 12:28 AM
  5. Riva stage III results
    By Alex13 in forum 4-Tec Performance
    Replies: 26
    Last Post: 10-23-2006, 05:21 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
  •