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  1. #1
    Member
    Join Date
    Aug 2016
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    Palmyra, MO
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    32

    Hydro-Tech Heads????

    I am running a 2004 196 Champion with a 2004 VMAX HPDI. It is a 2.6L motor. It is horrible on the low end. I was wondering how much a new set of heads from hydro-tech would help. Anyone have any ideas? Also, any other suggestions to increase performance with out going to a complete phase kit.

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  3. aka Strokedyamaha StrokerSmoker's Avatar
    Join Date
    Oct 2014
    Location
    Kansas
    Posts
    1,653
    #2
    the heads have the best single bolt on gain....but to realize the full potential the parts on the phase kits are matched together for the best efficiency and power .....Lots of R and D put in to the phase kits on the dyno and on the water proven....

    Hi performance parts or a Yamaha power head visit
    Hydro-Tec's web site @ http://www.yamaha-rebuild.com/


    Back in my day, we had vegetarianism too,
    it was called, "Damn! We're outa meat again"

  4. Member MIKER2702's Avatar
    Join Date
    Jun 2004
    Location
    maryville
    Posts
    1,752
    #3
    Quote Originally Posted by cpower23 View Post
    I am running a 2004 196 Champion with a 2004 VMAX HPDI. It is a 2.6L motor. It is horrible on the low end. I was wondering how much a new set of heads from hydro-tech would help. Anyone have any ideas? Also, any other suggestions to increase performance with out going to a complete phase kit.
    2.6 liter does not take to the hop ups as well as the big block on hpdis
    on a champion I would say it would not be as much as you would like to see.
    2-3 mph at best.
    1998 bullet 20xd 2006 225 sport xs

  5. Member
    Join Date
    Dec 2008
    Location
    claremore
    Posts
    620
    #4
    I have a 01 196, it had a 2.6 200 yamaha with ph 2 kit. Dont waste your money on a ph kit with it on that boat. Get a 3 liter yamaha , then get a ph kit. Thats what i did. BIG difference!!!

  6. Member
    Join Date
    Apr 2014
    Location
    Maryland Eastern Shore
    Posts
    5
    #5
    I have a sport boat, but have learned much from the knowledgeable members on this site that I have used. I'm interested in the HydroTec heads for my 2005 300 HPDI. I'm located on the Eastern Shore of Maryland, and the best gas I have "reasonable" access to is 90 octane, non-e. I have a set of CC reeds in place, but don't want to pull the head for a tuner. Reliability and performance are my 2 priorities. Would I need an octane booster added at every fill-up? I'll test my existing compression when a bit warmer, but the engine is healthy and well maintained. Let's assume I have a consistent 120 psi, what would the cut heads raise the psi to? Would I be entering into a space that I would regret at a later time? Thanks for you input
    -John

  7. Member
    Join Date
    Jul 2014
    Location
    KALKASKA MICHIGAN
    Posts
    925
    #6
    From my experience with the 300, if you only have 90 available I would not get heads. Fresh 91-92 would be on the edge IMHO. I am running 90 non e in my 3.1 BUT the compression is only 120 with H/T heads. I believe the pistons they use to build these engines are on the high side of the CC range in the chamber so the give a little bit lower compression. Give Mat or Wayne a call they will be of more help than I ever could and may have something new on these 300's from 10+ years ago when I messed with them. CJ
    2002 X19 200HP OX66 HO Vmax,HPDI lower, it lives, thanks Hydro Tec.