2011 - Crane Cams

CAMSHAFTS
Chevrolet V-8 67-95
138
Application
Mechanical Roller Camshafts
Competition only, strong mid range and top end for
572+ cu.in. Super Gas and Super Comp, good upper
RPM HP, 540+ cu.in., drag racing, auto transmission
w/race converter, 12.5 minimum compression ratio
advised. Good w/large manifold nitrous system. Good
w/large Roots supercharger, 30 lbs. maximum boost
w/8.0 maximum compression ratio advised.
Competition only, 600+ cu.in., Top Sportsman, Quick
16, Top Dragster, auto transmission w/race converter,
13.0 minimum compression ratio advised.
Competition only, 640+ cu.in.,Top Sportsman, Quick
16,Top Dragster, auto transmission w/race converter,
14.0 minimum compression ratio advised.
Radical competition only, good upper RPM HP, 640+
cu.in., bracket racing, Pro Street, auto trans w/race
converter, intended for large manifold nitrous system,
14.5 minimum compression ratio advised.
Competition only, maximum performance applications,
500+ cu.in., Super Quick, etc., auto transmission
w/race converter, 13.0 minimum compression
ratio advised.
Competition only, maximum performance applications,
500+ cu.in., Super Comp, Super Quick, etc., stick
or auto transmission w/race converter, 14.0 minimum
compression ratio advised.
Competition only, maximum performance applications,
560+ cu.in., Super Comp, Super Quick, etc., stick
or auto transmission w/race converter, 14.0 minimum
compression ratio advised.
Competition only, large cu.in. Top Sportsman, Pro
Stock, Quick 16, good also w/large manifold nitrous
systems, auto transmission w/race converter, 14.5
minimum compression ratio advised.
Competition only, IHRA Pro Stock, unlimited Street,
very large cu.in. applications, also good w/large manifold
nitrous systems, 14.5 minimum compression ratio
advised.
Competition only, Supercharged Unlimited Street, very
large cu.in. applications, for 55mm bearing journals.
Also good w/large manifold nitrous systems.
RPM range shown is for average usage. These cam profiles
will RPM higher, depending upon application.
Camshaft Series/
Grind Number
IMPORTANT: AdjustableVacuum Advance Kits available. See page
333 for details.
IMPORTANT NOTE: 1991-95 GenV engines can use these camshafts
and components if they are converted to adjustable
rocker arms by machining the cylinder heads for 99157-16
7/16”screw-in studs and 13650-1 pushrod guideplates, and
installing appropriate rocker arms.
RPM
POWER
RANGE
Camshaft
PART NUMBER/
Emissions Code
See pg. 296
LIFTERS
NOTE: Many options are available for these camshafts, and any of
our custom ground camshafts. An iron distributor drive gear
and rear journal can be specified. SFO firing order (4/7 swap)
is offered. Optional journal sizes are: Roller Bearing (1.968”),
2.125”, and 55mm (2.165”). Gun drilling (where applicable)
is available. Camshafts for the GM DRCE family ofV-8’s are
also offered in 55mm and 60mm journal versions.
CRANECAMS.COM
396-402-427-454 cu.in.
COMPLETE CAM SPECIFICATIONS
Degrees
Duration
@ .050”
Int/Exh.
Advertised
Degrees
Duration
Int/Exh.
Degrees
Lobe
Separation
Open/Close
@ .050”
Cam Lift
Int/Exh
R-284/456-2S5-14 5000- 138391
8400
*a 13570-16c 284 324 114 31 73 .026 .775
R-284/456-2S5-14 SFO 138401 *a,b 13574-16d 296 336 85 31 .026 .740
R-286/490-2S1-14 SFO 5000-
8000
R-286/500-2S3-16 SFO 5000-
7600
R-286/5151-2S-16 SFO 6000-
8400
321-334-10R 5000-
8200
333-344-14R 5000-
8400
R-288/5002-2S2-12 SFO 5000-
8400
R-288/515-2S2-16 SFO 5000-
8400
R-288/515-2S3-18 SFO 5200-
8400
R-292/5152-2S-17 SFO 55J 5800-
8600
3
Lash
Hot
Int.
Exh.
138771 *a,b 13570-16 c 286 326 114 34 72 .026 .833
13574-16 d 306 352 92 34 .030 .810
3
138951 *a,b 13570-16 c 286 326 116 30 76 .026 .850
13574-16 d 298 348 89 29 .030 .816
3
NOTE: In order to use these cams in 65-66 engines, you must
groove the center of the rear cam bearing journal, 3/16”
wide and 7/64”deep.
Since 1975, General Motors divisions have exchanged engines
throughout different models. Be certain of exactly which
engine you have before ordering.
Gross
Lift
Int.
Exh.
138961 *a,b 13570-16 c 286 320 116 31 75 .024 .876
13574-16 d 310 344 94 36 .026 .794
3
19315 *a 13570-16 c 287 321 110 37.5 69.5 .030 .723
13574-16 d 292 334 80 32 .030 .714
3
19333 *a 13570-16 c 287 333 114 33.5 73.5 .035 .774
13574-16 d 297 344 87.5 29.5 .030 .726
3
138971 *a,b 13570-16 c 288 318 112 37 71 .020 .850
13574-16 d 300 332 87 33 .022 .850
3
138911 *a,b 13570-16 c 288 322 116 31 77 .024 .876
13574-16 d 312 352 96 36 .030 .800
3
138921 *a,b 13570-16 c 288 318 118 30 78 .020 .876
13574-16 d 316 348 100 36 .022 .850
3
138981 *a,b 13570-16 c 292 322 117 34 78 .020 .876
13574-16 d 310 342 97 33 .022 .850
3