How much will these actually help me out? Will I feel a difference in acceleration?

I have a 3.8 A4 '98 Camaro, but I'm going to turbo it as soon as I can... Should I just hold off on these suspension mods until I'm making good power?

 

After installing both tubular LCAs and a PHR, I noticed the rear of the car felt much tighter but it really didn't solve my traction problems. Long story short, a good pair of tires would do my car a better service. If you plan on going the forced induction route one day, then they may be good upgrades to plan on but until then...

 

You'll feel little to no difference. Good tires will do much more for you.