Duratec High Performance Camshafts

---

---

Cosworth has been engineering camshafts for nearly 50 years. That coupled with years of innovative multi-valve cylinder head design ensures our camshaft designs are the most efficient in providing maximum usable power across the widest power band. Each cam is ground from a new chill cast billet and finished using the same procedures we use in our extreme level race engines and available in tested profile combinations covering a wide range of applications. Additionally, Cosworth camshafts are ground with the timing slot positioned for optimum cam timing thereby simplifying installation. Valve springs must be upgraded when exceeding 7200 rpm and 9.5mm lift. Always replace camshaft sprocket fasteners when changing camshafts along with the addition of our camshaft friction washer (YJ0092). Note: Camshafts listed are not compatible with Mazda variable cam timing feature. Application power levels listed show the potential of the camshaft with suitable performance engine modifications.

Part #	Application	Bar timing	Lift	Duration@ Ramp	Duration@ 0.050"	Max RPM
YD0223	Inlet:250hp 2.3	111	11.3mm /.450"	282	242	7800
YD0224	Inlet:240hp 2.3	101	11.3mm /.450"	282	242	7800
YD0222	Inlet:210hp 2.0	112	9.5mm / .380"	256	216	7800
YD0222	Inlet:200hp 2.3, 220hp 2.3	112	9.5mm / .380"	256	216	7200
YD0173	Exhaust:210hp 2.0, 240hp 2.3	113	9.5mm / .380"	256	216	7800
YD0173	Exhaust:200hp 2.3, 220hp 2.3	113	9.5mm / .380"	256	216	7200
YD0182	Exhaust:250hp 2.3	103	9.95mm / .400"	262	222	8000
YD0718	Inlet:250hp 2.0, 270hp 2.3	104	12.5mm / .500"	303	258	8500
YD0719	Exhaust:250hp 2.0, 270hp 2.3	100	11.3mm /.450"	290	244	8500