How to find the right Automotive Performance Roller Rockers AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Automotive Performance Roller Rockers
- Full roller vs roller tip
- Choose full rollers, which have a roller trunnion and tip, for high spring loads. Roller-tip rockers suit only mild builds. A roller-tip rocker still uses a friction pivot that wears and adds friction.
- Ratio and cam spec
- Use the ratio the cam was specified for, or recheck valve spring and clearances for a higher ratio. Ratio changes valve lift and spring travel.
- Stud size and clearance
- Match the rocker's stud hole to your studs, and check clearance to the valve cover and to the spring retainer at full lift. Roller rocker bodies are bulkier than stamped rockers and may need taller valve covers.
- Aluminium vs steel body
- Choose steel for high spring loads and long life. Choose aluminium for low mass in race use, and replace or inspect it on a schedule. Aluminium fatigues over time, while steel tolerates high loads longer.
- Geometry check
- Measure pushrod length with an adjustable checker so the roller tip sweep is centered on the valve stem. A changed rocker design often needs a different pushrod length than stock.
Brands that matter
- COMP Cams: Aluminium and steel roller rockers in many ratios and stud sizes.
- Crane Cams: Established roller rocker lines.
- Scorpion Performance: Roller rockers for common V8s.
- Harland Sharp: Long-standing aluminium roller rocker maker.
- Crower: Race-grade roller rockers.
- Proform: Budget roller rockers.
What to avoid
- Installing roller rockers without checking pushrod length and geometry.
- Using roller rockers with stock nuts where polylocks are required.
- Using unbranded rockers with no stated ratio or spring-load rating.