[niggs98]

i think the polite way of saying it is that you are masivley over geared at the moment which with a brushless will cause it to go a lot slower than what over gearing a brushed motor would

experience of most racers (myself included) is to possibly go from the recomended 14.1 down to 13.1 for uk tracks as the tyres are a slighly smaller diamiter and then adjust from there or in this case find the smallest pinion you have and put it on as if your gear guess is correct at a 10 tooth it obviously wont fit.

the gearing you have on at the moment will eventually lead to you wrecking your motor or speedo or possibly both so gear it down and belive it or not you will find your car will become a complete rocket ship meaning you wont need a 3.5. look at the national a finalists, most still use a 5.5 in 4wd and only ocasionally drop to a 4.5 if they really need horse power