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Post by Karterdude! on Aug 25, 2009 21:25:47 GMT 9.5
Which one is better?
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Post by Karterdude! on Aug 27, 2009 20:23:22 GMT 9.5
So.............?
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Post by Karterdude! on Sept 1, 2009 18:10:01 GMT 9.5
Pretty quiet on here recently it must be because everyone is keeping their secrets for the Aussie Title.
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Post by Mr X on Nov 27, 2009 14:04:41 GMT 9.5
Steel is the way to go even though alloy is lighter it rips through break pads like they are paper so I would stick with steel. If you are looking for a lighter option why not just make the steel disk a little thinner?
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Post by tom on Dec 11, 2009 19:11:47 GMT 9.5
Aluminium is easier to balance, it's just a lot more expensive as you need to get the rotor ceramic coated or hard anodised to get decent brake performance.
If you think i'm joking about the balance of your brake disc, next time you have your chain off the axle, spin the axle up to around 2000rpm on the stand (make sure someone is hanging on to the kart) and i bet you'll be amazed how much the rear axle assembly is out of balance. Typically most of the imbalance will be in the brake rotor.
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Post by Kart 16 on Dec 12, 2009 19:50:01 GMT 9.5
Tom, isn't the main reason why people want a lighter brake disk so rotating weight is reduced. Which means you motor doesn't have to work as hard to spin the axle, which results in a quicker kart setup than those with heavier rotating weight.
Aluminum is easier to balance, but I think they might be asking about rotating weight and not balancing.
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Post by tom on Dec 13, 2009 10:08:40 GMT 9.5
I agree that rotating weight is probably the main reason people would think of going to an aluminium rotor.
I disagree that rotating weight is the main benefit.
If you are wheelspinning from apex to exit there is no gain in reducing rotating weight of either your engine or axle assembly.. The most important factor is being able to control wheelspin. Rear axle assembly balance is a factor here.
For those that are concerned about rotational weight.. Replace your powdercoated aluminium wheels with magnesium before you rush out and buy a new brake rotor.. (Just don't expect to notice the difference!)
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