Mods are two-edged swords. They don't always make you go faster, particularly if you radically change the handling characteristics of your car and you're not ready for it. However, that's also a part of the challenge and the fun...to dial the car in and to adapt your own style to the car's characteristics.
When I started doing HPDEs over ten years ago I was an extreme "don't mod the car" kind of guy, doing nothing but brake fluid for the first 18 track days, and my first mod thereafter being more aggressive street pads. I think in some ways that held back my development as a driver. I became really used to understeer and the slow response of my suspension. I think I would be a better driver today if I had modded my car to be neutral or a bit oversteery from the start. However, that's not without its risks, particularly for beginners.
Last edited by yyoo; 06-25-2012 at 04:10 AM.