Older Camshaft Profiles (Small Block Hydraulic: HE Series)

Camshaft and Lifter Articles and Flow Charts
Grind Number Valve Lift 1.5 Valve Lift 1.6 Duration at .050" tappet lift Advertised Duration (at .008" lift) Lobe Separation Angle Opening at .050" tappet lift Closing at .050" tappet lift
HE0410AL INT .407"
EXH .420"		 INT .434"
EXH .448"		 204
212		 247
261		 112 7 ATC
41 BBC		 31 ABC
9 BTC
HE0914AL INT .458"
EXH .470"		 INT .489"
EXH .501"		 208
214		 252
260		 112 5 ATC
42 BBC		 33 ABC
8 BTC
HE1423AL INT .470"
EXH .504"		 INT .501"
EXH .538"		 214
223		 260
270		 112 2 ATC
46.5 BBC		 36 ABC
3.5 BTC
HE1923AL INT .489"
EXH .504"		 INT .522"
EXH .538"		 219
223		 266
270		 112 .5 BTC
46.5 BBC		 38.5 ABC
3.5 BTC
HE2430AL INT .504"
EXH .515"		 INT .538"
EXH .549"		 223
230		 270
276		 110 4.5 BTC
48 BBC		 38.5 ABC
2 ATC
HE3038AL INT .515"
EXH .535"		 INT .549"
EXH .571"		 230
237		 276
286		 110 8 BTC
51.5 BBC		 42 ABC
5.5 ATC
HE3844AL INT .535"
EXH .540"		 INT .571"
EXH .576"		 237
243		 286
290		 108 13.5 BTC
52.5 BBC		 43.5 ABC
10.5 ATC
HE4449AL INT .540"
EXH .557"		 INT .576"
EXH .594"		 243
248		 290
298		 108 16.5 BTC
55 BBC		 46.5 ABC
13 ATC
HE4854AL INT .557"
EXH .570"		 INT .594"
EXH .608"		 248
254		 295
306		 107 20 BTC
57 BBC		 48 ABC
17 ATC
HE5459AL INT .570"
EXH .570"		 INT .608"
EXH .608"		 254
259		 304
310		 107 23 BTC
59.5 BBC		 51 ABC
19.5 ATC
Tags: Camshaft and lifter articles and flow charts