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06-11-2009, 10:37 PM
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Upgrade a curtis controller or buy a new Kelly KDH12100??
I built a racing 125cc GoKart with a D&D ES15A motor 240 A123 Cell (30S8P) 99 Volt nominal, with a Kelly KDH96500A (96 Volt, 120 Max, 500 Amp max (10second) 400 Amp 1 minutes.... I'm disapointed(I want instant torque) by the slow current ramping, it's only consuming 100 battery Amp at start up and will reach 375 Amp max (battery current)
Here is my project: Robin Almasi's 2005 BRM Racing Go Kart The question is, do I upgrade for the Kelly 120 Volt (136 max) 1000 Amp or I try to modify a old Curtis Golf cart controller with new high voltage mosfet with much lower ON resistance....? I don't want to spend the 3000$ for a Zilla 1K....but I know it's what I want! Robin Almasi     
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08-28-2009, 12:30 AM
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the kelly controllers are notorious for being underpowered..... if you want 500A, get a 1000A controller. The current drops off quickly.
Otherwise a 500A curtis would be great and offer better peak current for longer.
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