Two Sundays ago I ran 32's on my 13.5 car, and they hooked up great. I had used 28's the first 2 rounds, then went to 32's for round 3 and the mains. The traction had come up just enough that the 32's felt as planted as the 28's did in the morning.
I had started out with 24's when I built the car, but I noticed that towards the end of the day the car was hard to drive. It wasn't traction rolling, but it felt like I was fighting the car because of the tires. I threw on the 28's I mentioned and it helped a lot, and the 32's even more so.
Hope this info helps!
Stop holding bitterness deep in your bum soul.