DC Plasma's first Speeding Ticket 155mph

25703 Views 32 Replies 9 Participants Last post by epyon, Jun 13, 2013

John Metric

Discussion Starter · Mar 25, 2012 (Edited)

DC Plasma raced the Texas Mile today and ran a 134mph in the 1/2 mile and 155mph in the full mile. From a standing start. You can see the first uploaded video by Mike Dunn here.

http://www.youtube.com/watch?v=I6x-zCkYPL0&list=FL9pAXoc92fS7PtTrXudLJ1A&index=1&feature=plpp_video

Kind of neat from second 44 to 55 the jet engine sound of the run.

We ran at 210motor volts on the new helwig brushes.
Stock netgain motors otherwise. and a single zilla and half rated battery current at 1200 amps.

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21 - 33 of 33 Posts

John Metric

Discussion Starter · #21 · Jun 1, 2012

Brute Force said:
Congratulations on the Awesome Run!

Was that dust kicking up off the tarmac the second half mile, or magic smoke leaking out of the motors?

Turns out it was magic smoke.

Brush wires and trailing edge arcing.

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John Metric

Discussion Starter · #22 · Jun 1, 2012

somanywelps said:
360kw peak?

That's about right at half power, see the chart.

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epyon

· #23 · Aug 8, 2012

Are you gonna use seperate ducted air and fans to each of the motors for your 160 mph try ?

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John Metric

Discussion Starter · #24 · Aug 8, 2012

epyon said:
Are you gonna use seperate ducted air and fans to each of the motors for your 160 mph try ?

Actually I was thinking of forced air ducts piped directly to the brushes. and then maybe a bilge pump for cooling afterwards.

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epyon

· #25 · Aug 9, 2012

I was thinking of sucking the air out too. Are you reading my notes ?

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John Metric

Discussion Starter · #26 · Aug 9, 2012

epyon said:
I was thinking of sucking the air out too. Are you reading my notes ?

Yep, I get most of my ideas from you guys.

How is your two ton oldsmobile going?

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epyon

· #27 · Aug 10, 2012

AUUHGG , THUNDERBIRD !! Lighter and going to the body shop Friday . I just can't seem to get a controller to work for me . The motor turns and changes direction , but I might not have the power to go thru the controller because I can't charge the battery's yet . (very low budget an no one to help)

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epyon

· #28 · May 31, 2013

Going to use two motors , one per wheel . Or one motor direct drive . And I will be putting the controllers or controller up front to cool it .

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John Metric

Discussion Starter · #29 · Jun 3, 2013

epyon said:
Going to use two motors , one per wheel . Or one motor direct drive . And I will be putting the controllers or controller up front to cool it .

Just save some time and put the two motors in line direct drive in the transmission tunnel. You should already have a strong Ford 7.5 inch differential in there with probably a very low numbered highway gear.

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epyon

· #30 · Jun 5, 2013

But I want higher RPM's from the motor . The main 3.00-1 an 2.80-1coming in the mail . Is 150 Amps the basic amount needed to get high speed geared cars like ours off the line in a ok manner ? I"ll be using a 6.00-1 gear to drive around for a little bit .

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dougingraham

· #31 · Jun 5, 2013

epyon said:
But I want higher RPM's from the motor . The main 3.00-1 an 2.80-1coming in the mail . Is 150 Amps the basic amount needed to get high speed geared cars like ours off the line in a ok manner ? I"ll be using a 6.00-1 gear to drive around for a little bit .

150 amps is pretty wimpy. If you had a 300v battery (and the motor was happy at 300 volts) and 150 amps this is 60 horsepower into the motor. At the wheels you might see only 80% of this so only 48 horsepower. With a 4 speed transmission and a 2000 lb car you might make 60mph in 20 seconds. So not really. A 100v battery would be 1/3 of that and I would be surprised if you could even get to 60mph. 500 amps would be ok with common setups and a light car with reasonable reduction ratios. But you wont see 155mph.

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John Metric

Discussion Starter · #32 · Jun 10, 2013

150 is all right if you get a push up to 60mph.
150amps won't creep that big car through tall grass with a 2.80 gear.
You are going to want more amps.

Metric

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epyon

· #33 · Jun 13, 2013

How many amps ? My short term goal is only 45 MPH .

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