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lithium vs lead acid for gokarts

For electric go karts, which one is better (for the money)? Lead acid is by far much much cheaper, but it is much much heavier. With a heavier battery you need a stronger frame, which weighs even more. With all of this weight you need an even stronger motor to push it all. With lithium you can build a lighter, cheaper frame, and power it with a weaker and cheaper motor and still obtain the same speeds. Lead Acid batteries take up about 1/3 the weight of a gokart with rider (1/3 being the driver, and the other third being chasis and motor and such). Reducing the weight by about a third (honestly, lithium, batteries weigh like nothing) could have huge performance improvements. So, does spending more money on batteries, and saving money on chasis and motor equal out to spending less on batteries and more on chasis and motor?

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12V7 years ago
lithium batteries are more inclined to explode under high load.
Gjdj37 years ago
I'm pretty sure that the lithium batteries will be way more expensive. So expensive, that any weight reduction won't make up for it. You might find a good deal somewhere though. Where have you been looking?
guyfrom7up (author)  Gjdj37 years ago
ebay, deal extreme, google, surplus sites, wholesale sellers you know, the usual ;)
(and like Gjdj3 - resize you avatar to "square" and it's head won't get cut off)
guyfrom7up (author)  lemonie7 years ago
there we go
guyfrom7up (author)  guyfrom7up7 years ago
the robot seems a little skinny now, doesn't he :P
Yea - looks like it should! (still a bit "porky" though) L
lemonie7 years ago
lemonie7 years ago
I think the electric (battery) speed record was set with NiMHs (a lot of them).
60mph is a lot, the power needed to overcome drag is proportional to v3 or something similar. You'd want 5Kw at least I'd think?

L
guyfrom7up (author)  lemonie7 years ago
Is there a way to calculate friction based on weight, and shape (for wind resistance)? I'm just wondering if cutting back on weight is really worth it for extra money.
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