Older Camshaft Profiles (Small Block Solid: HEV Series)

Camshaft and Lifter Articles and Flow Charts
Grind Number Valve Lift 1.5 Valve Lift 1.6 Duration at .200"
tappet lift		 Duration at .050"
tappet lift		 Advertised Duration
(at .020" lift)		 Lobe Separation Angle Opening at .050" tappet lift Closing at .050" tappet lift
HEV3945AS INT .546"
EXH .560"		 INT .582"
EXH .597"		 157
163		 239
245		 270
277		 107 15.5 BTC
52.5 BBC		 43.5 ABC
12.5 ATC
HEV4550AS INT .560"
EXH .575"		 INT .597"
EXH .613"		 163
167		 245
250		 277
283		 106 19.5 BTC
54 BBC		 45.5 ABC
16 ATC
HEV5056AS INT .575"
EXH .587"		 INT .613"
EXH .626"		 167
171		 250
256		 283
290		 106 22 BTC
57 BBC		 48 ABC
19 ATC
HEV5663AS INT .587"
EXH .602"		 INT .626"
EXH .642"		 171
181		 256
265		 290
297		 106 25 BTC
61.5 BBC		 51 ABC
23.5 ATC
HEV6368AS INT .602"
EXH .615"		 INT .642"
EXH .656"		 181
185		 265
270		 297
302		 106 29.5 BTC
64 BBC		 55.5 ABC
26 ATC
HEV6876AS INT .615"
EXH .630"		 INT .656"
EXH .672"		 185
190		 270
276		 302
309		 106 32 BTC
67 BBC		 58 ABC
29 ATC
HEV7680AS INT .630"
EXH .630"		 INT .672"
EXH .672"		 190
201		 276
280		 309
316		 106 35 BTC
69 BBC		 61 ABC
31 ATC
HEV8080AS INT .630"
EXH .630"		 INT .672"
EXH .672"		 201
201		 280
280		 316
316		 106 37 BTC
79 BBC		 63 ABC
31 ATC

Valve Lash Settings: Intake .018" - .020" Exhaust .020" - .022"
Tags: Camshaft and lifter articles and flow charts