hmm, I dont get it , lol. The 1.4x3 should have way more pack the 1.7x2. The 1.7's were ok in the corners, but the chassis slapping was terrible. 1.6 had good pack but were not great in the corners. I really felt like the 1.4x3 very the best of both worlds. Post your entire setup, I am wondering if you did something vastly different with roll centers and camber gain.