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  1. #1
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    Hydrotec exhaust tuner

    So the Hydrotec exhaust tuner has been out for a while... http://www.shop.hydrotecmarine...Id=10


    Wondering how the 3.0 merc guys are finding it?


    Have any Simonized Merc guys put it in? Have you seen any value?

  2. Member Nikon Man's Avatar
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    #2

    Re: Hydrotec exhaust tuner (Chris1978)

    I can't make a claim to any power increase because I put it on during my new motor build, but I can say it's a very nice piece of work...........sounds good too..
    Gary



    Growing old is inevitable, growing up is optional.......

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  3. Member tmbullet's Avatar
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    #3

    Re: Hydrotec exhaust tuner (Nikon Man)

    I was told it hurts your holeshot, is that hearsay or true..

  4. Member Nikon Man's Avatar
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    #4

    Re: Hydrotec exhaust tuner (tmbullet)

    Again, all I can say is I sure don't have any hole shot issues............
    Gary



    Growing old is inevitable, growing up is optional.......

    S.W. Ohio

  5. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #5

    Re: Hydrotec exhaust tuner (tmbullet)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by tmbullet &raquo;</td></tr><tr><td class="quote">I was told it hurts your holeshot, is that hearsay or true..</td></tr></table>

    A lot will depend on your setup, and whether or not the poppet diverter is installed.

    It's certainly going to be an improvement if you're replacing a "plugged" tuner.



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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    #6

    Re: Hydrotec exhaust tuner (Chris1978)

    I'm suprised....when it was announced it seemed like everyone was really excited about the tuner???

    Wonder how many have actually been sold then if there is no reports on it ???

  7. Member Nikon Man's Avatar
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    #7

    Re: Hydrotec exhaust tuner (Chris1978)

    In all honesty, unless you've got your motor on a dyno you can't make any claims other than the seat of the pant dyno we all have...........

    Wayne at HydroTec did dyno his tuner and say's a average 12 HP gain will be realized with his tuner. 12 HP is a good increase, but honestly, it's somewhat hard to feel that's why I won't make any claims...... I've got one in my mod'd 250 EFI and will put one in my new motor when I get it done over the winter months.

    Gary



    Growing old is inevitable, growing up is optional.......

    S.W. Ohio

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    #8

    Re: Hydrotec exhaust tuner (Nikon Man)

    I've been told its basically a copy of the 300X tuner . However some people have them on thier X and they say they like them as well, however i havent heard any mph gains from these people before or after.

    I'll probably try one in the spring, its not just the cost of the tuner yuo have to conisder when instaling one its the gaskets as well their almost as much as the tuner.

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    #9

    Re: Hydrotec exhaust tuner (onttr22)

    I have bought a half dozen my self. We have installed them on a Simon 3.1L clone, 300x clone, stock 300x, 250xs, totally modded 300x and I have one for my current project! I have some dyno sheets from 2 of the motors and in both cases the HP increased and it did not decrease the torque..... They are different than a 300x tuner.

  10. Member Nikon Man's Avatar
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    #10

    Re: Hydrotec exhaust tuner (Todd D)

    There ya go, if anybody would know.........Todd would, being the HP junkie he is...............
    Gary



    Growing old is inevitable, growing up is optional.......

    S.W. Ohio

  11. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #11

    Re: Hydrotec exhaust tuner (Nikon Man)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by Nikon Man &raquo;</td></tr><tr><td class="quote">There ya go, if anybody would know.........Todd would, being the HP junkie he is............... </td></tr></table>

    +1 He's ALWAYS got a project going on... and they're ALWAYS very interesting!



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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    #12

    Re: Hydrotec exhaust tuner (Todd D)

    the tuner change in 250Xs do you have it on dyno sheets?? was it a stock 250XS?


    Peter Sandstrom /// Sweden

  13. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #13

    Re: Hydrotec exhaust tuner (Eagle670)

    Wayne has a Crankshaft Dyno HP chart on his site.... not sure, but I believe the mods were "cumulative":

    http://yamaha-rebuild.com/Mercury%20250XS.htm



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  14. Member esdbass's Avatar
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    #14

    Re: Hydrotec exhaust tuner (EuropeanAM)

    Everyone stop bothering Todd, he's working on finishing his
    "Warp Drive" motor for NASA and they are pressing him on a deadline before Thanksgiving

    Really, If he told Brent and I he was working on one we'd believe him

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    #15

    Re: Hydrotec exhaust tuner (EuropeanAM)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by EuropeanAM &raquo;</td></tr><tr><td class="quote">Wayne has a Crankshaft Dyno HP chart on his site.... not sure, but I believe the mods were "cumulative":

    http://yamaha-rebuild.com/Mercury%20250XS.htm

    </td></tr></table>

    If the results are cumulative, it appears the tuner only helped at high RPMs. The LW flywheel and ECU reprogram on the other hand worked across the entire range. Unless I read things wrong.

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    #16

    Re: Hydrotec exhaust tuner (RG-IN-NH)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by RG-IN-NH &raquo;</td></tr><tr><td class="quote">

    If the results are cumulative, it appears the tuner only helped at high RPMs. The LW flywheel and ECU reprogram on the other hand worked across the entire range. Unless I read things wrong. </td></tr></table>
    The way I read it, the port & blueprint, along with the tuner, give the gains. A light flywheel willshow a HP gain on most dynos that is not there, due to allowing the motor to rev quicker, applying more torque to the dyno. Light flywheel will give a performance gain, but not on top.
    Once my XS is ready for a rebuild, I would definitely consider the port & blueprint, as those will be real gains.

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    #17

    Re: Hydrotec exhaust tuner (Todd D)

    What is a Simon Clone ?

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    #18

    Re: Hydrotec exhaust tuner (onttr22)

    Instead of me sending a motor to Eric, he worked with me to build one myself with his knowledge and parts.

    No warp drives at this time But that would definitely be a first in the marine industry

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