tbichips.com (Brian Harris). Useful or Not?

[Fast355]

So, where does the 40-50 extra HP come from? Is Chevy's rating of 260 HP just that far off? (I'm not challenging your knowledge, im just curious.) And how much fuel pressure will I need to run with my stock injectors? 18-20psi? Thank you, I would greatly appreciate that bin too.

Gross vs Net HP rating and the fact you have long tube headers and full catless exhaust rather than those god awful manifolds and tiny 1 7/8" head pipes of a factory vortec truck. Also the TBI on a rpm intake is less restrictive than the factory vortec intake manifold with all the fuel spider crap in the way. A Vortec 350 with headers, decent exhaust and a good tune is over 250 rear wheel hp. Even using a very conservative 18% loss through the drivetrain that is 305 hp at the flywheel.

It is also experience with these engines telling me you need fuel for a lot more than 250 HP.