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  1. #241
    VinceC's Avatar
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    I have a quick question that must be somewhere in these threads but I can't find it. What is the boost (psi) on the SVHO? It was 7psi in the SHO right?

  2. #242

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    Quote Originally Posted by VinceC View Post
    I have a quick question that must be somewhere in these threads but I can't find it. What is the boost (psi) on the SVHO? It was 7psi in the SHO right?
    Yamaha said they upped the boost 60% so 60% of 7 psi is 4.2 psi. increase which suggest 11.2 psi of boost @ 7800 rpms. (max with oem ecm. However with modded ecm to allow for more rpms some guys are reporting 14+ psi. of boost @8500 rpms with the new 2014 SC. With the new ecm that cuts the throttle position back after full boost for 5 seconds to control the top speed you wont see this much boost for long on your gauge untill you get the ecm reflashed, Tommy Jordan
    Last edited by 2fast4u; 01-28-2014 at 05:46 PM.

  3. #243
    VinceC's Avatar
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    Ok...but i'm sure someone has put a boost gauge on a stock ski. I'm curious if Yami's stated increase is 11.2 psi on the stock ski.

  4. #244

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    Quote Originally Posted by VinceC View Post
    Ok...but i'm sure someone has put a boost gauge on a stock ski. I'm curious if Yami's stated increase is 11.2 psi on the stock ski.
    With the new ecm that cuts the throttle position back after full boost for 5 seconds to control the top speed you wont see this much boost for long on your gauge untill you get the ecm reflashed, Tommy Jordan

  5. #245
    Site Admin Green Hulk's Avatar
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    Boost numbers

    17 @ 8600.
    15.35 @ 8300
    13.92 @ 8000


  6. #246
    Hydrotherapy's Avatar
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    Hell of a stock wheel


  7. #247

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    the boat that dean is using is running 84mph and will be race this season
    Last edited by chip; 01-28-2014 at 08:53 PM.

  8. #248
    Hows the stock shaft holding @8500+ rpm.
    11 psi @7800 how about stock skis @7300 ?

  9. #249
    I knew the FZ's "sounded" healthier last Spring at the Photo-shoot.

    It's good to read our Powerplants and Hulls are so well received by enthusiasts.

    Rock-on !

    david
    Last edited by David_HX_RXP; 01-31-2014 at 12:20 PM.

  10. #250
    isa alnoaimi's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Boost numbers

    17 @ 8600.
    15.35 @ 8300
    13.92 @ 8000
    just wondering , what after market wheel equals the stock SVHO wheel ?

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