Older Camshaft Profiles (Big 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
HEV3945BS INT .546"
EXH .560"		 INT .582"
EXH .597"		 157
163		 239
245		 270
277		 108 14.5 BTC
53.5 BBC		 44.5 ABC
11.5 ATC
HEV4550BS INT .560"
EXH .575"		 INT .597"
EXH .613"		 163
167		 245
250		 277
283		 108 17.5 BTC
56 BBC		 47.5 ABC
14 ATC
HEV5056BS INT .575"
EXH .587"		 INT .613"
EXH .626"		 167
171		 250
256		 283
290		 108 20 BTC
59 BBC		 50 ABC
17 ATC
HEV5663BS INT .587"
EXH .602"		 INT .626"
EXH .642"		 171
181		 256
265		 290
297		 108 23 BTC
63.5 BBC		 53 ABC
21.5 ATC
HEV6368BS INT .602"
EXH .615"		 INT .642"
EXH .656"		 181
185		 265
270		 297
302		 108 27.5 BTC
66 BBC		 57.5 ABC
24 ATC
HEV6876BS INT .615"
EXH .630"		 INT .656"
EXH .672"		 185
190		 270
276		 302
309		 108 30 BTC
69 BBC		 60 ABC
27 ATC
HEV7680BS INT .630"
EXH .630"		 INT .672"
EXH .672"		 190
201		 276
280		 309
316		 108 33 BTC
71 BBC		 63 ABC
29 ATC
HEV8080BS INT .630"
EXH .630"		 INT .672"
EXH .672"		 201
201		 280
280		 316
316		 108 35 BTC
71 BBC		 65 ABC
29 ATC

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