Cat Cams Full Race 285/277 Camshafts for Mazda MX-5 1.6 for competition engines. These Camshafts are for use in 1598cc B6 engines with long intake camshaft with sleeve for distributor drive and short exhaust camshaft. Will not work with standard hydraulic followers. Upgraded shim under bucket cam followers must be used.
- Camshafts must turn smooth in the cylinder head, provide free travel by machining where needed
- Distance between valve seal and retainer at full lift must be 0.6mm at least
- Minimum valve spring travel of 1.0mm at full lift must be provided
- Distance between the valve and piston 1.0mm (pref. 1.5mm). check 5-15? before TDC on the exhaust and after TDC on the intake
- Only for use in competition engines?with adjustable engine management
Camshaft Data | Intake | Exhaust |
---|---|---|
Lash ramp | 0.25mm | 0.25mm |
Duration @ 0.1mm | 285? | 277? |
Duration @ 1.0mm | 252? | 243? |
Valve lift | 12.50mm | 12.00mm |
Lobe angle | 106 | 106 |
Timing @ 1.0mm | 20? / 52? | 48? / 15? |
Valve lift @ TDC | 3.70mm | 3.15mm |
Parts Required | ||
---|---|---|
Cam Wheels | Y | Y |
Followers | Y | Y |
Valve Lash | Y | Y |
Valve Spring | Y | Y |