Electric (hope this is not a repost) |
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Electric (hope this is not a repost) |
Aidan |
Jan 19 2018, 10:44 PM
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#1
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Newbie Group: Members Posts: 18 Joined: 26-December 17 From: FWB Member No.: 21,729 Region Association: None |
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914Mike |
Jan 22 2018, 09:31 AM
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#2
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Member Group: Members Posts: 330 Joined: 27-January 03 From: San Jose, CA Member No.: 198 |
Main problem with this build is the DC motor. You _really_ want an AC motor so that you can have "regenerative braking" put some power back into the batteries. DC systems simply freewheel and need massive brakes to stop that much added weight. (Lead batteries weigh about 60-70 lbs a piece, and you need 10 12V or 20 6V for 600-1400 lbs of mostly additional weight over stock. Lithium is the only real choice these day$.)
Can you imagine driving a 914 that's a half ton overweight with zero engine braking? |
DRPHIL914 |
Jan 22 2018, 01:03 PM
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#3
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Dr. Phil Group: Members Posts: 5,766 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
Main problem with this build is the DC motor. You _really_ want an AC motor so that you can have "regenerative braking" put some power back into the batteries. DC systems simply freewheel and need massive brakes to stop that much added weight. (Lead batteries weigh about 60-70 lbs a piece, and you need 10 12V or 20 6V for 600-1400 lbs of mostly additional weight over stock. Lithium is the only real choice these day$.) Can you imagine driving a 914 that's a half ton overweight with zero engine braking? I originally bought my 914 8 years ago while my son was in college working on his engineering degree. he was very interested in making a EV car or hydrogen or something ,but ti just could not make myself cut up my car to do any of that so we never did. it would not be hard to put LIPo batteries in, 4x lighter and 4x the charging capacity weight would not be an issue so neither would braking. too bad its on the wrong coast, I would grab this if it were closer. |
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