299.1

Didn't realize it was a 4.8L

 

237.67 rwhp

 

260hp

 

280 - 290 is what I figure, I'm hopping to hit the 300 mark if I do, I know I have a great combo for a 4.8.
Anyone know how much the stock 4L60E will hold?

 

Add some 1 5/8" shorties, 2 1/2" exaust, x pipe, ram air tube & some more tweaking and I think I can hit about 325-335 RWHP.

 

270hp

 

I say 267 - not counting what you mentioned in post 15

 

One dollar Bob

 

279 hp

 

Id say around 283 rwhp. Add long tubes and around 300 to the ground. I believe the Zo6 cam is good for 17 to the ground. I have a 2003 5.3 with full bolt ons Long tubes, No cats ud pulley and I am putting down 285 to the ground. So you will definetly need long tubes with that cam. Hope that helps.