Getting my JGP Silverado Dyno Tuned and I'm curious to hear what kind of HP/TQ people think its going to make. Its a 4.8L 5 spd with pacesetter long tubes and ORY, no cats, and a 3.3'' pulley. Im hoping for 400hp at the wheels.

 

330-350 rwhp

 

I know a guy with a 4.8 5 speed Gibbs that had shorty headers and 3.4 pulley and dynoed 353 at the rear wheels. I'm pretty sure his tune was crappy though.

 

im gettin it tuned by a guy in southern md who was recommended to me that used HP Tuner. Apparently he's pretty good

 

The blown 4.8 on here f/s put down 385/385 thru a 65e and the blower was THE ONLY performance modification done. You should be around 400whp imo

 

I have been thinking about putting mine on the rollers.