New cam?

[albaniadiadem]

Im currently running lunati vodoo cam in a 355 with vortec heads, flattop pistons. Current cam specs are.

Basic Operating RPM Range: 1,000-5,500

Intake Duration at 050 inch Lift: 213

Exhaust Duration at 050 inch Lift: 219

Duration at 050 inch Lift: 213 int./219 exh.

Advertised Intake Duration: 256

Advertised Exhaust Duration: 262

Advertised Duration: 256 int./262 exh.

Intake Valve Lift with Factory Rocker Arm Ratio: 0.454 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.468 in.

Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.468 exh.

Lobe Separation (degrees): 112


Im wanting more power and my question is how much HP will i gain from switching to one of these cams. Note my heads already have new springs to support a bigger lift.

Basic Operating RPM Range: 1,400-5,700

Intake Duration at 050 inch Lift: 219

Exhaust Duration at 050 inch Lift: 227

Duration at 050 inch Lift: 219 int./227 exh.

Advertised Intake Duration: 262

Advertised Exhaust Duration: 268

Advertised Duration: 262 int./268 exh.

Intake Valve Lift with Factory Rocker Arm Ratio: 0.468 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.489 in.

Valve Lift with Factory Rocker Arm Ratio: 0.468 int./0.489 exh.


or this cam

Basic Operating RPM Range: 1,800-6,000

Intake Duration at 050 inch Lift: 230

Exhaust Duration at 050 inch Lift: 236

Duration at 050 inch Lift: 230 int./236 exh.

Advertised Intake Duration: 274

Advertised Exhaust Duration: 286

Advertised Duration: 274 int./286 exh.

Intake Valve Lift with Factory Rocker Arm Ratio: 0.490 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.490 in.

Valve Lift with Factory Rocker Arm Ratio: 0.490 int./0.490 exh.

Lobe Separation (degrees): 110

or this

Basic Operating RPM Range: 1,800-6,200

Intake Duration at 050 inch Lift: 227

Exhaust Duration at 050 inch Lift: 233

Duration at 050 inch Lift: 227 int./233 exh.

Advertised Intake Duration: 268

Advertised Exhaust Duration: 276

Advertised Duration: 268 int./276 exh.

Intake Valve Lift with Factory Rocker Arm Ratio: 0.489 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.504 in.

Valve Lift with Factory Rocker Arm Ratio: 0.489 int./0.504 exh.

Lobe Separation (degrees): 110

[rich weyand]

You'll turn your truck into a slug. Look at those rpm ranges. As those go up, torque at low rpm goes down. Horsepower is all fine and dandy on the track, but on the street you drive torque.

All of those cams will feel weaker for a street truck than what you are running now.

[Jake Wade]

Rich is spot on, the bigger cams will make more HP but, at a higher rpm. What you gain up top, you lose at the lower end, where you spend most of your time on the street.

What you really want is more cubes.