Sorry to post and ask this but I have researched for a couple of days with no luck. I have a 2003 5.3 ecsb 4x4 and was wondering what it takes N/A to get in the 13's. Right now I have full bolt ons and run around 15.5-15.8 with the 18's, and 15.0-15.3 with the 16's. I am thinking This year I will get a yank 3600 stall and launch in 4 HI. What will that inprove my time. I have heard some talking around 6-8 tenths. I just want to run a mid to hi 14 with stall. Then adding a 224-224 558 cam might be close to a 13. What do you all think. And who has a N/A 5.3 ecsb 4x4 who is running a big stall and cam. Let me Know, Thanks, Jared

 

A converter will give maybe .5 with the right cam, or vice versa. I ran 15 flat with a 224 cam and 3000 rpm stall with 2.2 60's on stock 32" tires.