Older Camshaft Profiles (Big Block "HEV" Solid)

12/31/1969
Archives


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"

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