Disappointed in my 383 on the Dyno

Could use a lot more camshaft

Performer RPM cam (even the flat tappet) is far from a stock cam:

• Lift: .480''/.495''

• Duration @ .050: 238°/246°

• Advertised Duration: 300°/308°

• Stock 383 roadrunner 4bbl was .450/.468 lift with 268/284 duration The duration at .050 lift is 214/225

But still pretty mild by todays standard