I have a Duratrax Firehammer that I am changing the spur/pinion gear on. The stock gear for this car is a 48 tooth spur and a 19 tooth pinion. I will be installing a 44 tooth spur and a 22 tooth pinion for more top end. I have clocked the car in stock form at 34 MPH. What mph increase should I expect to see with this gear change? I know it will loose low end power, am I going to KILL the low end with this setup or will it be decent. I just do bashing at local parks/fields, no short-track type of racing, so I think I should be okay with this. Top speed estimates anyone????