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Discussion Starter #1
I know there are a few Fieros on the list. Hoping for some input.
I am building mine with LiFePO4s at 154 volts and using a Jim Husted 8 inch
motor. I am wondering what is the thought to what I should expect for
performance. At this point it will be direct drive using a 4:44 gear. This
will get me almost 70 mph top speed. I figure if I don't like it I will up
the differential to a Ford 8.8inch and get the ratio up to 5.13:1 but will
loose top end.
Almost forgot. I figure somewhere around 2,600 pounds

Comments please,

Mark Grasser

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Discussion Starter #2
I'm running 36 SE/CALB 100ah cells with an AC HPEVS motor and Curtis 1238
550amp controller in my 2500lb Fiero. The motor spins to 6500RPM and I can
hit 67mph in second, I do most of my driving in second, which is about a 7:1
total drive ratio. I think your low end acceleration will be pretty weak at
4.44 gearing and you'll be drawing a lot of current and heating the motor at
lower speeds.


Mark Grasser wrote:
>
> I know there are a few Fieros on the list. Hoping for some input.
> I am building mine with LiFePO4s at 154 volts and using a Jim Husted 8
> inch
> motor. I am wondering what is the thought to what I should expect for
> performance. At this point it will be direct drive using a 4:44 gear. This
> will get me almost 70 mph top speed. I figure if I don't like it I will up
> the differential to a Ford 8.8inch and get the ratio up to 5.13:1 but
> will
> loose top end.
> Almost forgot. I figure somewhere around 2,600 pounds
>
> Comments please,
>
> Mark Grasser
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
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>
>

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Discussion Starter #3
AMPhibian
I have always thought that a Fiero would make a great conversion. Do
you have a web page that I can read up on your car ?

How many miles do you have on the CALB cells ? Any problems with them
or are they just doing what they should ?

KJD
http://www.evalbum.com/3175

AMPhibian wrote:
I'm running 36 SE/CALB 100ah cells with an AC HPEVS motor and Curtis
1238 550amp controller in my 2500lb Fiero. The motor spins to 6500RPM
and I can hit 67mph in second, I do most of my driving in second,
which is about a 7:1 total drive ratio. I think your low end
acceleration will be pretty weak at 4.44 gearing and you'll be drawing
a lot of current and heating the motor at lower speeds.

Mark Grasser wrote:
I know there are a few Fieros on the list. Hoping for some input.
I am building mine with LiFePO4s at 154 volts and using a Jim Husted 8
inch
motor. I am wondering what is the thought to what I should expect for
performance. At this point it will be direct drive using a 4:44 gear.
This
will get me almost 70 mph top speed. I figure if I don't like it I
will up
the differential to a Ford 8.8inch and get the ratio up to 5.13:1 but
will
loose top end.
Almost forgot. I figure somewhere around 2,600 pounds




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Discussion Starter #4
http://www.evalbum.com/3156
http://www.diyelectriccar.com/forums/showthread.php/eviero-ac31-se100-fiero-build-41752.html
I think I'm around 5-6K miles on it, no problems with the CALBs so far, I
run them pretty hard at about 1.5C average and bursts of 5.5C when I get on
it.


kjd wrote:
>
> AMPhibian
> I have always thought that a Fiero would make a great conversion. Do
> you have a web page that I can read up on your car ?
>
> How many miles do you have on the CALB cells ? Any problems with them
> or are they just doing what they should ?
>
> KJD
> http://www.evalbum.com/3175
>
> AMPhibian wrote:
> I'm running 36 SE/CALB 100ah cells with an AC HPEVS motor and Curtis
> 1238 550amp controller in my 2500lb Fiero. The motor spins to 6500RPM
> and I can hit 67mph in second, I do most of my driving in second,
> which is about a 7:1 total drive ratio. I think your low end
> acceleration will be pretty weak at 4.44 gearing and you'll be drawing
> a lot of current and heating the motor at lower speeds.
>
> Mark Grasser wrote:
> I know there are a few Fieros on the list. Hoping for some input.
> I am building mine with LiFePO4s at 154 volts and using a Jim Husted 8
> inch
> motor. I am wondering what is the thought to what I should expect for
> performance. At this point it will be direct drive using a 4:44 gear.
> This
> will get me almost 70 mph top speed. I figure if I don't like it I
> will up
> the differential to a Ford 8.8inch and get the ratio up to 5.13:1 but
> will
> loose top end.
> Almost forgot. I figure somewhere around 2,600 pounds
>
>
>
>
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>
>

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Discussion Starter #5
On 2 Jan 2011 at 17:05, AMPhibian wrote:

> I think your low end acceleration will be pretty weak at 4.44 gearing
> and you'll be drawing a lot of current and heating the motor at lower
> speeds.
>

My Comuta-Car had a 5.13 axle and 12" tires, and it weighed only 1400lb. It
pulled disastrous currents when climbing moderately steep hills. When I put
a 350 amp controller in it, the motor stopped overheating and burning out
brush pigtails, but then I needed a running start for even slight hills.

With a sufficiently stout motor and a vorpal controller, I'm sure you can
make a driveable car, but I don't think your battery will be very happy.

Fieros aren't as light as they look (the Honda NSX is even heavier). If you
want a midmotor 2-place EV, a Fiat X1/9 might be a better glider. It's a
good 25% lighter. The challenge is to find one that doesn't have terminal
cancer.

David Roden
EVDL Administrator
http://www.evdl.org/


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