Get my car to launch better...

Brad - I'm running Mickey Thompson ET Street Drag Radials. Am I missing out on that much by not having a full slick? I heard great things about those drag radials, but if full slicks are that much better I'm game for trying a set out. I currently have the adjustable snubber set about 1.5" below the pan, and I'm leaving at 3500rpm. I had traction problems trying to leave at higher rpms or by just dumping the clutch.