Camshafts

Is your engine running out of breath at the top of the rev range after your other upgrades? The camshafts control when and how long the valves open, and therefore how the engine pulls. Here you'll find camshafts in various stages for both naturally aspirated engines and engines with a turbo or supercharger.

What the camshaft controls in the engine

The cam profile determines valve lift, how long the valves stay open, and how much the intake and exhaust valves overlap. More lift and longer duration can give more power high in the rev range, but typically at the expense of low-end torque and a smooth idle. Numbers like 264 or 276 in the product name, e.g. from Brian Crower, typically indicate the duration in degrees. You'll find more profiles under performance camshafts.

How to choose camshafts

The choice depends on more factors than just a high stage:

• Engine code and version: The profile must match the specific engine, e.g. there is a distinction between the 2JZGTE and the 2JZGE with VVTi.
• Induction: Some camshafts come in versions for naturally aspirated and turbo engines, e.g. for the Honda D16Y8.
• Use: A street car and a trackday car place different demands on idle, torque and rev range.
• The rest of the build: Boost pressure, intake, exhaust and engine management affect which profile makes sense.

Brands in this category include Skunk2 Racing, COMP Cams, Hot Cams and GSC Power Division.

Installation and supporting parts

More lift can require stronger valve springs and matching retainers so the valves don't float at high revs. Also check piston-to-valve clearance, and whether engine timing parts need to be replaced or adjusted. The camshafts must be timed precisely, and the engine management typically needs to be tuned afterwards.

Frequently asked questions

Do I need to replace the valve springs when installing new camshafts?

It depends on the profile and the engine. More lift and a more aggressive profile can require stronger springs and new retainers. Check the manufacturer's recommendation for the specific part number before installation.

Do new camshafts require an ECU tune?

Typically yes, especially with larger profiles. Changed duration and overlap affect airflow and idle, so fuel and ignition should be adjusted for the engine to run stably and safely.

Can camshafts cause problems at vehicle inspection?

It depends on the product and the car. A more aggressive profile can affect idle and emissions, so check for the specific part number whether the part is road legal and whether the modification needs to be approved.