a biger cam would do some good things for u like posted before u are noot even using the full potencial of those heads and intake......also if u going to be doing na passes maybe a looser converter to match a good size cam and that top end.......just something to go by i ran 13.0 at 108 with street tires and with out that intake u are using and a heavyer 4l80 but i had a way biger cam (236 236) and a 4400 stall .....with ur set up and a little biger cam i dont see why u cant go into the 12s na...i ran 12.0 at 108 with the 4l60 and the lsxr so i see no issues u going 12s

 

Nice numbers

 

My 5.3 with a 224/228 .581/.588 112+2 made 352/344 unlocked auto with shaved stock 243 heads and a unported fast 90. so.. You should have made more imo.

 

I expected it to run faster than a 14.1...i ran a 14.4 with a slipping trans with just cold air, exhaust, and a tune...

 

Yea it should definitely run better. I ran a 13.8 at 98 in a 5400lb crewcab without heads and fast lsxrt, but my cam was a 224/230

 

Hopefully ill be able to go at least 13.999 after my tranny and converter goes in

 

I think that 364RWHP is pretty decent from a 5.3. I dyno'd my truck on thursday at LMR AND ONLY PUT DOWN 324RWHP. I developed an intake manifold leak causing my truck to idle at 3k rpm while in park. I think that its from the o-rings that I installed b/c the o-rings that were provided with the lsxrt kit didnt fit. My set up is pretty close to this setup but im running the stock 243 heads. Dyno link is below

5.3 gmc Sierra dyno pull - YouTube

 

if the dude was sick and irriated he shouldnt have taken your money, and took off for the day, your tune seems like its not even complete!!


the guys mentioned and hit on some good advice, pending on how far you wanna take the truck you have gobs left in it!!

 

your running a LSXrt with a 78mm throttle body? your truck definitely needs some more tuning

 

AFR looks like its a turbo tune! rich as fuuuuuuck!