SMALL BLOCK V-8 HYDRAULIC ROLLER TAPPET CAMSHAFTS (M-6250-Z303*)

PART NUMBER

ENGINE

ROCKER RATIO

INTAKE EVENTS (0.050')

EXHAUST EVENTS (0.050')

DURATION (SAE)

LIFT (INCHES)

LOBE CENTER

OPEN

CLOSE

OPEN

CLOSE

INT.

EXH.

LOBE

VALVE

INT.

EXH.

M-6250-B303* (1)(2)(3)(7)

1985 and Later 302 Roller Cam

1.60

5 BTC

39 ABC

49 BBC

5 BTC

284

284

.300 I

.480 I

107

117

224

224

.300 E

.480 E

M-6250-E303 (1)(2)(3)(7) (8)

1985 and Later 302 Roller Cam

1.60

0 BTC

40 ABC

40 BBC

0 BTC

282

282

.311 I

.498 I

110

110

220

220

.311 E

.498 E

M-6250-F303* (1)(2)(3)(4) (7)(9)

1985 and Later 302 Roller Cam

1.60

4 BTC

42 ABC

52 BBC

6 BTC

288

288

.320 I

.512 I

109

119

226

226

.320 E

.512 E

M-6250-X303* (1)(2)(3)(4) (7)(10)

1985 and Later 302 Roller Cam

1.60

5 BTC

39 ABC

49 BBC

5 BTC

286

286

.339 I

.542 I

107

117

224

224

.339 E

.542 E

M-6250-Z303* (1)(2)(3)(4) (5)(7)(11)

1985 and Later 302 Roller Cam

1.60

7 BTC

41 ABC

51 BBC

3 ATC

290

290

.345 I

.552 I

107

117

228

228

.345 E

.552 E

NOTE: Camshaft intake and exhaust valve events are measured at 0.050" tappet lift. The duration figures in the shaded area are taken at 0.050" tappet lift. This is useful to check the cam with a degree wheel during installation. The solid color is advertised duration. For comparison purposes, add intake and exhaust lobe centers and divide by 2 to calculate "camshaft centerline" specification for Ford Racing camshafts. NOTES: ⁽¹⁾ On EFI engines, performance camshafts work only with mass air induction systems. Will not work with Explorer EEC-V EFI. ⁽²⁾ Also fits 1994-97 351W with factory roller cam when used with mass air EFI. ⁽³⁾ Stock 5.0L HO cam advertised specs are 266/266 duration, 0.444"/0.444" lift. ⁽⁴⁾ May require piston modification for piston-to-valve clearance. Valve clearance should be checked. ⁽⁵⁾ May require longer pushrods. ⁽⁷⁾ Hi-Stall torque converter recommended for automatic trans. ⁽⁸⁾ Emissions legal with 5-speed manual trans. E.O. #D-225-16 ⁽⁹⁾ Great for superchargers. Manual transmission recommended. ⁽¹⁰⁾ Good torque and power up to 6200 RPM. Manual transmission recommended. ⁽¹¹⁾ Good torque and power up to 6500 RPM. Manual transmission recommended.