So can anyone give a rough breakdown for horsepower gains?
Stock 5.9 upgrade heads only 20-30hp give or take the assembly - I think Indy is the only place to get them now too, and they come bare. So if a performance shop gets them, does a good modern valve job,and uses the right parts I don;t think 30hp is far fetched with no other changes.
Add cam upgrade. - Need to have a cam design to even consider and it's dependant on the intake, heads, and exh manifolding choices.
Add intake/carb. - - Another 15 - 25hp with intake alone. Carb's fine IMO
Add headers/exhaust. - If you have manifolds now - an easy 25-30hp with headers and decent 2 1/2" pipes w/good mufflers. If your exhaust is stock now, closer to 10-15hp.
The comp cams simulator does this but not sure how accurate that is and I'm not sure how to input a stock cam.
