Cam Spec Elite Selective HP Calculator

Cam and engine combo estimator + dyno curve.

Step 1: Geometry • Step 2: Catalog • Step 3: Cam Spec • Step 4: Intake/Fuel/Boost → Dyno curve. Estimations only; real-world dyno wins.

1 • Engine

2 • Catalog

3 • Cam Spec

4 • Tune

Rocker Ratio Adjustment

Catalog / Published Ratio

Your Rocker Ratio

Net Valve Lift

Intake: 0.585"

Exhaust: 0.574"

We convert the published cam lift (based on the catalog ratio) to your rocker ratio before sampling head flow or horsepower.

Step 1 • Engine Geometry

Bore • Stroke • Rod • Volumes

Imperial

Bore (in)

Stroke (in)

Rod Length (in)

Cylinders

Chamber Volume (cc)

Piston Dome/Dish (cc)

Gasket Bore (in)

Gasket Thickness (in)

Deck Clearance (in)

Displacement: - CID • Static CR: - : 1

Step 2 • Catalog Selection

Make → Family → Cam → Head

Engine Make

Engine Family

Cam Selection

Cylinder Head

Dynamic CR (est): - : 1Head Flow Applied: 300 cfm @28"

Step 3 • Cam Specifications

Auto-filled from catalog — tweak as needed

Cam Name

Int Dur @ .050 (°)

Exh Dur @ .050 (°)

LSA (°)

IVC @ .050 (ABDC °)

Int Lift (in)

Exh Lift (in)

Cam RPM Start

Cam RPM End

Step 4 • Intake, Fuel & Boost

Tune layer • Dyno RPM range

Intake Type

Fuel

Boost (psi)

Target AFR (WOT)

Intercooler Eff (0-1)

Compressor Eff (0.4-0.85)

Turbo or Blower

Graph RPM Start

Graph RPM End