Earlier was mentioned about the W2W turbo kit on the 4.8 pulling 542 HP in stock dress. But what was not mentioned was these #'s are not RWHP #'s but pure engine HP #'s without accessories.
The 542 HP at 8psi boost was calculated using standard correction not SEA correction #'s which will yield ~ 10% higher #'s. So for the ~54HP loss for SEA correction and ~35hp loss for accessories and even not including drivetrain HP loss we're talking about ~450HP. So with the W2W 67mm Garrett, I would be guessing somewhere in the range of 400-420 RWHP?!?
I still feel that a reasonable amount of forced induction is a great addition to the little 4.8l.

Any recomendations for a decent cam for the 67mm single turbo setup for a street driven stock 4.8l 6 speed 2100 lb car with an LS1 intake ??
Sorry to ramble but I want everyone to understand where these #'s came from.

 

AZ-Z: go with a 212/218 cam with like a 530ish lift. I think that is what I had in my turbo 4.8 setup/

 

you may have seen these charts in another recent post but they apply here too.

here are some charts i have for my completely stock 4.8 with a t76. the gtech runs were on a cold night and i have found my gtech corection factor is .3sec and 5mph so drop(it is .3 slower than the chart says) all those 1/4mile et's by that amount. with sticky tires and loading it higer on the launch i am sure a true high 11sec run is posiable on a totaly stock 4.8. with valve spring you could take the motor to 6000rpm and the numbers would hold prety good up there. this is on a mustang dyno thru a 4l80e and tcase with some wheel slip.

 

Thanks 8NTLG for the cam #'s. What kind of centerline # am I looking for??
Also what IR % should I be looking for for the turbo?
Nice #'s on the Dyno charts!! Look to be right around where the W2W #'s would be.
Thanks

 

put some 317 heads on there, that should lower your compression somewhere in the 8's. With a good tune you could push the little 4.8 up to 20psi or more. I did this on my 5.3. Chevy made these motors stronger than you'd think.