No, there is no way you mentioned. The only way to make it faster is to invest in your car: brushless motor or brushed motor with fewer turns, high quality bearings, lightenend parts like carbon chassis, titanium parts instead of alloy to name a few. Going faster costs money and that is up to you: how much would you invest and is your car worth it ( I won't invest too much into a Tamiya TT-01 for excample)