Hello all,
I have a 2003 gmc ex cab 4x4. 5.3 3.73 G80, 18 inch wheels. Anyways I have headers true dual exhaust and underdrive pulley. Elec. Fans. Ram air. I currently run a 15.25 at 89.54 mph. Oh I also Have a Custom tune. What I am wanting is a comp cam 224 228 568 lift with 112 LSA. Also I want a 3600 yank stall. What kind of gains should I expect with that big cam and stall. I launch in 4 hi so traction is not an issue. I want to run a mid to high 13's. Is that going to be possible, Let me know that you all think thanks, Jared

 

i have same truck as you, and we also share a few mods together. i use to run 15.7 before the yank. after the yank i run 15.3

so figure about .4-.5 sec with a 3000 stall. 3600 should even help more. i have no experience with cams. wish i could help you there. cam and stall probably won't get you to 13's, but definitely 14's. the only way you will see 13's i think is if you install STS turbo, Radix, or NOS on top of the cam and stall.

then you will have to worry about the tranny