Figured I would post this up here to show the power curve of what my 4.8 does.

stock 4.8l from 2003? GMC Sierra, no clue on miles, had a decent amount of sludge in the pan when it was pulled.
btr stage 3 truck cam v1, .553/.553 lift 218/224 113lsa +3 degrees of advance ground in
btr .560 springs
s10 ebay swap headers with 1” 5/8 primarys
2.5” exhaust y pipe to 3” exhaust, straight through Magnaflow knock off muffler
nbss intake manifold with eBay 92mm throttle body
tuned by me. Still learning lol.

peak numbers were 326/302 torque.
rev limit was kept to 6500, although I think it could have made power up to 6800 or so.
This dyno reads lower then most other dynos I’ve seen in Oregon, not saying its a heart breaker, but I think allot of the other local dynos show inflated numbers. Pretty happy with the numbers. Its fun in my little S10 but I’m hoping to stumble upon a 6.0l to swap in it down the road.

 

Should be a fun ride!