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Originally Posted by BrianG
From what I've seen, the slipperential tends to create a low gear ratio. To get more speed, try using smaller spur, larger pinion, higher voltage, higher kv motor, and/or bigger tires.
And don't forget, once the calculator gets past ~45mph, wind resistance plays a BIG role in actual speed (depending on vehicle).
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Your suggestion is a bit hard to make since it'll cost money.
I believe a direct drive ( cd-pinion) would help alot.
Promod once ran a Lehner XL1600 with 6s lipos in his truck with a centerdiff and it made a nice 50mph for him.
I'm 100% sure the problem is with the slipperential( it's for racing).