98laser and Csledd hit it (as well as the rest of you it looks like lol). BUT JUST BE SURE TO DO A NICE HOT BURNOUT OR THEY WILL NOT HOOK VERY GOOD! DRs are useless unless they are hot. I have ran my 275/15 nitto Drs before and really, just mix it up on the launches to figure out the best. On the first few passes, switch lanes to find the better hooking side (thats VERY important) and come out between 3k and 4K like said on the better side and check your slip to see what RPM hooks the best. you should be able to tell, the goal is to find that rpm right in between where the car spins and where it hooks and that will usually result in the best 60s. Start at 3K and work up...if it spins at 3K, ride the clutch out more, anywhere below that and your usually just hurting yourself....if it bogs at 3K, up launch rpm to 3500 and adjust up or down 200RPM at a time depending on how it launches. Just have fun and STAY CALM AND HAVE A GOOD TIME....NEVER GET MAD IF YOUR TIMES SUCK, YOU WILL GET BETTER
Look at this....simply a result of mixing it up and basically doing the above.
I went from 13.7 @ 101.8 to a 13.4 @ 103.05 JUST by changing launch RPM and shift points on the same night, same conditions and hot lapping it...after a 45min cool down I got the listed ET.