How important is C rating for sedan racing?
Is 100 amps enough(in my mind i think it would be plenty)? Gonna be running tc5r. tekin rs pro, novak 10.5, rubber. Just trying to figure out what lipos i need.
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Originally Posted by portyansky
(Post 7890994)
Is 100 amps enough(in my mind i think it would be plenty)? Gonna be running tc5r. tekin rs pro, novak 10.5, rubber. Just trying to figure out what lipos i need.
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Just about any packs rated 30C or better are fine. There really isn't any standardized test to truly measure continuous current. They're mostly theoretical "marketing" numbers. For example, if a 5000 mAh battery rated at 50C really had that 50C load on it, most likely the wires, connector, and / or solder job would melt.
After a full charge, run your TC for 6 minutes. Re-charge the battery, making note of the amount of mAh it takes to fully charge the pack. Multiply by 10, and that's your average current draw. A 17.5 foam tire TC was using 2200 - 2500 mAh in 6 minutes, for an average current draw of 22-25 Amps, or less than 5C. Granted, peak draw was a lot higher (around 70A, according to a Novak Sentry data logger), but even that is only 14C. Most packs are rated at 2x their C rating for burst current (like around a 10 second "pull"). Again, not even close. |
Originally Posted by CarbonJoe
(Post 7891406)
Just about any packs rated 30C or better are fine. There really isn't any standardized test to truly measure continuous current. They're mostly theoretical "marketing" numbers. For example, if a 5000 mAh battery rated at 50C really had that 50C load on it, most likely the wires, connector, and / or solder job would melt.
After a full charge, run your TC for 6 minutes. Re-charge the battery, making note of the amount of mAh it takes to fully charge the pack. Multiply by 10, and that's your average current draw. A 17.5 foam tire TC was using 2200 - 2500 mAh in 6 minutes, for an average current draw of 22-25 Amps, or less than 5C. Granted, peak draw was a lot higher (around 70A, according to a Novak Sentry data logger), but even that is only 14C. Most packs are rated at 2x their C rating for burst current (like around a 10 second "pull"). Again, not even close. |
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