5.3 bolt on + big cam , under 290hp ?

[Slow04xcab]

Dang I must've gotten pretty lucky. I have some cheap eBay headers with 2 1/2 collectors and 2 1/2 inch exhaust. Every dyno is different and will read different numbers. Still on factory injectors and fuel pump both with 175k on them. Will change pump and injectors once I'm able to change the heads and intake though. Also I didn't know it at the time of dyno but my trans was also screwed.

[kerrige]

My main issue with that cam is its huge for a stock headed older 5.3. Going over 230 intake duration in a 5.3 kills the power below 4500rpm you may have noticed the choppy nature of your torque curve. Now if you get some really well worked heads on it and 300 shot of spray then that's a great looking cam.

[Slow04xcab]

My main issue with that cam is its huge for a stock headed older 5.3. Going over 230 intake duration in a 5.3 kills the power below 4500rpm you may have noticed the choppy nature of your torque curve. Now if you get some really well worked heads on it and 300 shot of spray then that's a great looking cam.

Agreed