gentlemen... I've been building my 03 rcsb for the three years I've had it. All the questions and/or decisions that i've had have been answered and made on info from all of you on this site. I've learned alot. Thanks. My current search is for more horses without doing the 6.0 swap. I have the STS GT67 with et performance heads, small cam, 4l80 w/ shift kit, 373 eaton posi and am putting down 421 rwhp and 404 tq on 7 pounds of boost. Is there more mods for this or am I about maxed out. I still want this to be streetable.Thanks again in advance... Mike

 

What CR are oyu running? Turbo8 put down almost 700rwhp through a low CR 5.3 I wouldnt expect it to last at that level but with those mods you should be able to crank the boost up over 10#s and get you solidly into the 500range.

 

Have you had it dyno tuned?

 

Add some meth and turn it up to 10-12#

 

the heads have 64cc chambers in them and I don't know what the stock heads were. I have the meth injection with a pair of front mounted intercoolers from an f-body pro charger kit.

 

Make sure your intercoolers are doing a good job.

You can run a little more boost; maybe 10psi.
You already have better than average numbers.

 

im with trt for 7psi those r pretty good numbers!!!! u should turn up the boost just watch ur DC%