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Thread: Texas Mile 2019 on the Energica EGO

  1. #46
    Honest always, feared often Micah / AF1 Racing's Avatar
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    No yet. Bike is cranking some serious power down nw, 18-19 tooth front sprockets on order, 36 rear. Running into thermal limits as I’m pushing almost 400 amps across controller. I need 22 seconds of full power, highest number generated yet has been 178 ft/lbs of torque launching from 25 mph.
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
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  2. #47
    apriliaforum expert JAndrewG's Avatar
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    178 pounds of torque. Amazing.

    Since gearing is mostly about multiplying torque, and electric motors make power from zero RPM, the tall gearing probably has little effect out of the hole?

    John
    2008 RSV 1000 R, platinum/charcoal/red
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  3. #48
    apriliaforum expert jrflanne's Avatar
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    178ft-lbs?? That sounds seriously serious. Perhaps you need to supercool the controller in a liquid N bath.
    Bikes:
    2007.5 Tuono-Black, with 1102cc's of micah's badness!
    2012 Griso-Silver and black, Agostini pipe, some carbon bits.
    2006 Vespa GT200-bitubo suspension all around, Malossi big-bore, head and cam, Akrapovic pipe, all put together by Micah.

    gone 2002 Caponord-Oyster gray (as faithful as a hound dog)
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    The more I learn about people, the more I appreciate rocks.

  4. #49
    Honest always, feared often Micah / AF1 Racing's Avatar
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    I’m not opposed to CO2 cooling the battery, controller and AC wires. It’s cheap and easy, done it on cars. I NEED 400 amps for at least 17-18 seconds to go 170-180 mph at sea level. 18-19-35 T sprockets already incoming. Real question is, does more torque/lower motor rpm go faster than allowing motor to spin faster on an electric bike.
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
    @ShoemakerMicah
    @AF1Racingaustin

  5. #50
    apriliaforum expert jrflanne's Avatar
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    N would be better.
    Bikes:
    2007.5 Tuono-Black, with 1102cc's of micah's badness!
    2012 Griso-Silver and black, Agostini pipe, some carbon bits.
    2006 Vespa GT200-bitubo suspension all around, Malossi big-bore, head and cam, Akrapovic pipe, all put together by Micah.

    gone 2002 Caponord-Oyster gray (as faithful as a hound dog)
    gone Futura-Red (on the AF1 showroom floor. Get some.)

    The more I learn about people, the more I appreciate rocks.

  6. #51
    Honest always, feared often Micah / AF1 Racing's Avatar
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    Nitrogen is fine, readily available, huge drop in temp from entropy bebtween liquid and gaseous state.
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
    @ShoemakerMicah
    @AF1Racingaustin

  7. #52
    apriliaforum expert pete roper's Avatar
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    Latent heat is a wonderful thing!
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  8. #53
    apriliaforum expert LUCKY DAVE's Avatar
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    Remember that tall-as-a-mountain tire we needed to get enough gearing on the Punisher?
    200/50?
    Move the footpegs as needed to get your feet out of the air stream and cut the bars as short as you can, it made a big difference with the Punisher.
    A finish is a win! Moderation is the key! More wine!
    And never lend a faggot your hat

    Proud Member of Team Punisher and The Texas Mile 200 MPH club
    Motorcycles are not just fun toys. They are a catalyst for the enjoyment of life. - NaimChase
    When you ride a bike that tries to crawl out from underneath you at 150MPH with a slight twist you know you're on the right path. - TRexRacing

  9. #54
    apriliaforum expert LUCKY DAVE's Avatar
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    Real question is, does more torque/lower motor rpm go faster than allowing motor to spin faster on an electric bike.
    It should. The torque falls off quickly with rpm in electric motors, max torque is at locked rotor.
    A finish is a win! Moderation is the key! More wine!
    And never lend a faggot your hat

    Proud Member of Team Punisher and The Texas Mile 200 MPH club
    Motorcycles are not just fun toys. They are a catalyst for the enjoyment of life. - NaimChase
    When you ride a bike that tries to crawl out from underneath you at 150MPH with a slight twist you know you're on the right path. - TRexRacing

  10. #55
    apriliaforum expert LUCKY DAVE's Avatar
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    I NEED 400 amps for at least 17-18 seconds....
    Maybe not, the motor pulls max amps at zero speed, amp draw should fall off with rising rpm.
    Can you measure this on the dyno?
    A finish is a win! Moderation is the key! More wine!
    And never lend a faggot your hat

    Proud Member of Team Punisher and The Texas Mile 200 MPH club
    Motorcycles are not just fun toys. They are a catalyst for the enjoyment of life. - NaimChase
    When you ride a bike that tries to crawl out from underneath you at 150MPH with a slight twist you know you're on the right path. - TRexRacing

  11. #56
    Honest always, feared often Micah / AF1 Racing's Avatar
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    Yes Dave, it’s a 3 phase PWM AC motor, Launch amperage, is about 380 amps, which it maintains initial a certain sensor in inverter comes on a 37C temp and starts throttling back power. Oddly the inverter never gets warm Anouilh in general to turbo on its electric water cooling system so today’s test is to force that one with diagnostic software and see what happens. I’m of the opinion the best speed will come with the tallest possible gearing on an electric, hence my desire to try 19-36 next. Stock was 16:44
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
    @ShoemakerMicah
    @AF1Racingaustin

  12. #57
    apriliaforum expert LUCKY DAVE's Avatar
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    Micah, you may recall that in addition to my other pursuits I am a weekly (electric powered) RC car racer.
    These are also variable frequency three phase ac drives, there is likely some similarity to the strategy for going fast as your mile project. RC racers have been at this a long time, and like all racers they have experimented with making things go faster.
    RC racing is big business in places where it's cold in the winter or where land is too expensive to build full size tracks (Japan and Europe for example) so there are pro racers that make upwards of $100K/year to do this, and it turns out that a handful of them live local to me and race at my home track every Wednesday night. I race two and four wheel drive, I'm an average racer in the intermediate class, when the Pro class runs it's worth walking out of the pits to watch, as they're as good as the top dogs in any other form of racing.
    Anyway....the RC world has discovered that high amperage charging of the LiPo batteries drives up the voltage (a lot) giving a distinct power boost during the first thirty seconds or so of the (5 to 7 minutes long) race. We typically charge tiny 2 cell battery packs at 40-70 amps.
    I strongly urge you to look into the RC racing world to find out the latest charging methods to make variable freq ac motors scream bloody horsepower.
    A finish is a win! Moderation is the key! More wine!
    And never lend a faggot your hat

    Proud Member of Team Punisher and The Texas Mile 200 MPH club
    Motorcycles are not just fun toys. They are a catalyst for the enjoyment of life. - NaimChase
    When you ride a bike that tries to crawl out from underneath you at 150MPH with a slight twist you know you're on the right path. - TRexRacing

  13. #58
    apriliaforum expert yzr750's Avatar
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    Quote Originally Posted by LUCKY DAVE View Post
    Anyway....the RC world has discovered that high amperage charging of the LiPo batteries drives up the voltage (a lot) giving a distinct power boost during the first thirty seconds or so of the (5 to 7 minutes long) race. We typically charge tiny 2 cell battery packs at 40-70 amps.
    That's interesting, what does that do to the longevity of the battery pack?
    seesecurity.com.au

  14. #59
    apriliaforum expert LUCKY DAVE's Avatar
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    Quote Originally Posted by yzr750 View Post
    That's interesting, what does that do to the longevity of the battery pack?
    Shortens it, and you have to monitor battery temperature during charging as fire is a possibility.
    Why do this?
    Cause Racing.......
    A finish is a win! Moderation is the key! More wine!
    And never lend a faggot your hat

    Proud Member of Team Punisher and The Texas Mile 200 MPH club
    Motorcycles are not just fun toys. They are a catalyst for the enjoyment of life. - NaimChase
    When you ride a bike that tries to crawl out from underneath you at 150MPH with a slight twist you know you're on the right path. - TRexRacing

  15. #60
    apriliaforum expert LUCKY DAVE's Avatar
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    The purpose of the heavy ampere "balance" charge/discharge cycles we routinely put our batteries through is to lower internal impedance (internal resistance to current flow). Cycling a battery with (the typical) 7-10 ohms impedance through 40 amp charge/discharge cycles a couple times usually lowers the impedence to <1ohm.
    Less impedance, more current flow = more power.
    A finish is a win! Moderation is the key! More wine!
    And never lend a faggot your hat

    Proud Member of Team Punisher and The Texas Mile 200 MPH club
    Motorcycles are not just fun toys. They are a catalyst for the enjoyment of life. - NaimChase
    When you ride a bike that tries to crawl out from underneath you at 150MPH with a slight twist you know you're on the right path. - TRexRacing

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