K!ssmySS

I have a 6.0L (LQ9) wanna know what you guys think about the setup and what hp/tq it would crank out. Also anybody with a similar setup please share numbers. Much appreciated (stock 345hp 380tq)
specs: 236/246 cam
tbss/nbss intake
92mm throttle body
799 heads spring upgrade
1³/⁴ longtubes
42lb injectors
looking forward to hear what you guys think

Utinator

Sure, I'll take a guess. I say 420/395 to the wheels. Wait, which transmission you running?

K!ssmySS

4l80e 4000 yank stall numbers sounds good to me

Utinator

Oh, the 4L80. In that case, my new guesstimate is 395/375 to the wheels.

Utinator

Do you have 799 heads, or just the springs?

As you can see in my signature, I have 6.0 heads (317 castings). I had mine milled down .030" to get the compression up. You wouldn't need to do that with 799 heads.

You have a bigger block, cam, and throttle body than me. Based on that, you should be able to get more hp/tq than me. If you don't do something with the heads, you will probably end up with close to the same hp/tq as me. Don't ignore the heads. You can easily make more hp there with what you have. They just need a little tough love.

K!ssmySS

I have the 799 head I just have pac springs in them no mill work and how much you put out

Utinator

Those heads should work well. It wouldn't hurt to shave a couple cc off them, but you should still be around 11.04:1 compression.

I'm getting 382hp/368tq at the wheels with a 10.4:1 compression. My heads were also ported, but I still have the stock throttle body.

I'm gonna stick to my second guess of 395hp/375tq.