What about dusty though? It seemed to help my car on the dusty track. Our track is kinda bumpy also but not terrible. My problem was the dusty surface. The car was hard to drive hard without the rear washing out. You think i went the wrong way with setup? If so, i posted my setup on the page prior. Let me know what you feel could change. My car feels great but i am always up to try something different. Diff oil changes would suck but i am willing. Takes so long.