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Discussion Starter #1
I have followed the various drag racers who hang out here with some
interest. It is obvious that a Zilla can push a DC motor to a highly
impressive performance for 10 or 15 seconds.

I'm wondering how suitable the available EV technology is for circuit
racing? If I wanted at least 10 to 20 minutes of high power operation, what
would I need and compared to what is being done on the drag strip, how much
would I have to derate in order to stop it overheating? Would a Zilla with a
big enough radiator have any problems? I'm guessing a blower would be
required on the motor, but how big would it have to be? Would an AC system
with both a water cooled motor and controller be more appropriate? Obviously
regen would help keep the battery pack size down.

Is there anything other than the A123 Systems offering that can take a 20
minute discharge with regular high current regen and discharge spikes? I
guess I have to do my sums and decide on what weight of batteries I can
carry before this can be properly answered.

Thanks.
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Discussion Starter #3
Hi Tom,

> I'm wondering how suitable the available EV technology is for circuit
> racing?

It has been over one hundred years since an electric car last won a
sanctioned close circuit road race against ICE competition but the Electric
Imp is getting close to breaking the gas car dominance. We have a couple of
second place finishes to our credit.

> Is there anything other than the A123 Systems offering that can take a 20
> minute discharge with regular high current regen and discharge spikes?

We are running 100 amp-hr Kokam HP batteries. http://www.kokamamerica.com/
These are amazing large format lithium polymer cells. They are rated for 500
amps continuous, 800 amps peak. They are rated to recharge at 200 amps I.E.
in about half an hour if you can find a big enough charging source. We are
regenning at 300 amps without problem and hope to go higher as we build
experience with the system.

For road racing, capacity is the key. On the road, the car uses about 250
W-hrs per mile. On the track, we use about 1,250 W-hrs per mile. With our 35
kW-hr pack, we can drive around 180 miles on the road but must turn down our
power to finish a 35 mile race.

<Would an AC system
> with both a water cooled motor and controller be more appropriate?
> Obviously
> regen would help keep the battery pack size down.

Running all wheel drive and AC motors is designed to allow us to make full
use of regenerative braking. We have a 'Regen' pedal in place of the clutch
pedal. It gives the car controllable progressive regen. We need even more
stopping power on the track, so left foot controls regen and the right foot
blends in some friction braking. Range gains are track and driving style
depended but range improvement is from between 7% to 20% with 15% being
about average.

There is a ton of technical information on our website www.ProEV.com and we
are always willing to answer questions. Basically the EV technology is
getting to the point that we can race with gas cars. It is not cheap and it
is not 'plug and play'. There is a lot to learn and it is an exciting
challenge. But we will be winning races soon.

Cliff
www.ProEV.com





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Discussion Starter #4
ProEV wrote:
> > I'm wondering how suitable the available EV technology is for circuit
> > racing?
>
> It has been over one hundred years since an electric car last won a
> sanctioned close circuit road race against ICE competition but the Electric
> Imp is getting close to breaking the gas car dominance. We have a couple of
> second place finishes to our credit.

I obviously missed your circuit racing activities. I knew you were doing
autocross, and I'm now fascinated to read your race reports. Thanks for
making them available.

I will spend some time digesting your website and hopefully be able to
ask some more intellegent questions shortly.

Thank you.



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Discussion Starter #5
Please dont forget about the FIA alternative energies
cup.

Here is a vid link of last years races in Italy (vid
is in Italian).
http://electricmotornews.lulop.com/player.php/7134/01



--- Tom Parker wrote:

>
ProEV wrote:
> > > I'm wondering how suitable the available EV
> technology is for circuit
> > > racing?
> >
> > It has been over one hundred years since an
> electric car last won a
> > sanctioned close circuit road race against ICE
> competition but the Electric
> > Imp is getting close to breaking the gas car
> dominance. We have a couple of
> > second place finishes to our credit.
>
> I obviously missed your circuit racing activities. I
> knew you were doing
> autocross, and I'm now fascinated to read your race
> reports. Thanks for
> making them available.
>
> I will spend some time digesting your website and
> hopefully be able to
> ask some more intellegent questions shortly.
>
> Thank you.
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>


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Discussion Starter #6
I believe Bill Dube ( correct me if I am wrong Bill) ran BEV 4wheelers in the Pike's Peak hillclimb. Maybe it was
somebody else?
It's pretty short, shorter than an oval or road-race, but measured in minutes, not seconds like the drags.
John

lyle sloan wrote:
> Please dont forget about the FIA alternative energies
> cup.
>
> Here is a vid link of last years races in Italy (vid
> is in Italian).
> http://electricmotornews.lulop.com/player.php/7134/01
>
>
>
> --- Tom Parker wrote:
>
>>
ProEV wrote:
>>>> I'm wondering how suitable the available EV
>> technology is for circuit
>>>> racing?

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Discussion Starter #7
John,

Were you thinking of Tim Eckert in 2002, then Jeri Unser in 2003 using LG
Chem Lithium Polymer cells? Here's a link.

http://www.megawattmotorworks.com/display.asp?dismode=article&artid=36

1999 seems to be a Honda effort:
http://corporate.honda.com/press/article.aspx?id=277

----- Original Message -----
From: "john fisher" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Friday, November 02, 2007 1:26 PM
Subject: Re: [EVDL] Circuit racing and continuous duty


>I believe Bill Dube ( correct me if I am wrong Bill) ran BEV 4wheelers in
>the Pike's Peak hillclimb. Maybe it was
> somebody else?
> It's pretty short, shorter than an oval or road-race, but measured in
> minutes, not seconds like the drags.
> John
>


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