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  1. #1

    Playin with the ipod today...dynolicious accelerations times, 2009 fzr.

    http://www.bunsentech.com/projects/dynolicious/
    This program was mentioned for the itouch a while back and with temperatures hovering around 8c, clear skies had me twitching to try it out. Current mods on my fzr are as follows

    RD intake, pump seal kit
    Riva intake
    Riva FF exhaust
    Flame arrestor removed
    C3 supercharger wheel
    No powershot yet, havent had time for my type 9 ic and hks install.
    13/24 skat

    Now my results are less than perfect, i didnt know i was supposed to have the accelerometer calibrated until i was on the water. Its tough to do right because you have to hit start and have little time to secure the itouch in the glove box and go (it activates when you move...). Another issue i found was that i was always in a rolling start which may explain why some of my runs go up around 90mph (i wish...70.4 is my best). The most accurate graph i was able to log was in kmph. With a top speed of 112.4 (i have seen 114 on my gps before). Always launch with it trimmed right down and click to 1 up once im on the move. If i dont trim right down my 150lbs wont keep the thing in the water.

    Average times in mph today (5 runs)(8 celsius)(81% humidity)(sea level)
    0-40mph 3.67 secs
    0-50mph 4.25 secs
    0-60mph 5.07 secs
    0-70mph 6.19 secs(graph continued on to 90mph...curious)

    My kmph run
    0-60kmph 2.43 secs
    0-70kmph 2.93 secs
    0-80kmph 3.50 secs
    0-90kmph 4.25 secs
    0-100kmph 5.78 secs(topped out at 112.9kmph)

    Accelerometer numbers (pulled a series of hard corners from 50-60mph)
    Max acceleration .75g
    Max braking .51g
    Max lateral 1.45g

    Compared to jerrys numbers, i am slow (he also had less mods) but i am a far less experienced rider. This is my first ski, 27.5 hours now. Curious to see if anyone else can try this program and help verify its accuracy. I used a small towel on top of the itouch with the glove box squished closed to keep it steady. Have not tried loading the graphs on the computer yet, but will do asap (not home). On an interesting side note, i tried this in my 2008 ford ranger and it estimated my horsepower at 228hp. I have an cold air intake and magnaflow dual exit exhaust installed. Ipod rated it 20hp higher than ford. Pretty close for me, but the ski only registered 100hp


  2. #2
    Chris03HD's Avatar
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    Props for having the balls to take your iTouch out on the water!

  3. #3
    Site Admin Green Hulk's Avatar
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    Interesting results Doug, thanks for sharing.

    Is this app available for the iPhone? I would like to play around with this a bit. I could also compare it to Stalker radar graphs to see how accurate it is.

  4. #4
    CT Marsh Dredging Crew STItaxi's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Interesting results Doug, thanks for sharing.

    Is this app available for the iPhone? I would like to play around with this a bit. I could also compare it to Stalker radar graphs to see how accurate it is.
    Yes, it is... I've tried it a few times but it's difficult to get a good calibration since you need to start from a dead stop, not idle.
    Takes some playing with the reverse bucket to get it.

  5. #5
    Addicted Member 5001craig's Avatar
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    Very nice Doug. Thanks for posting this info.

  6. #6
    It's not the destination, it's the journey!! Rip'nTear SHO's Avatar
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    Quote Originally Posted by STItaxi View Post
    Yes, it is... I've tried it a few times but it's difficult to get a good calibration since you need to start from a dead stop, not idle.
    Takes some playing with the reverse bucket to get it.
    This is the key....even slight waves/wakes/chop or creeping forward causes a trigger in the accelerometers and starts the 'run'......

  7. #7
    CT Marsh Dredging Crew STItaxi's Avatar
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    The same company also makes an app called 'Log Box' that might be a bit better for a PWC since it simply records accelerometer values so you could calibrate it on the beach and go for a few runs, then review the data at home.
    I haven't played with this one yet though.

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