2011 - Crane Cams

CAMSHAFTS
Chevrolet V-8 57-87
84
Application
Mechanical RollerCamshafts
Competition only, oval track, Sprint Car, Modified, Super
Modified, 1/2-5/8 mile dirt or asphalt, 355-406 cu.in.,
.950”base circle diameter, tapped for Sander rear drive,
12.5 minimum compression ratio advised.
Competition only, oval track, for 410 Sprint Car andWOO,
tapped for Sander rear drive, for roller bearing (1.875”)
journals. Lift w/1.7:1 rocker arms.
Competition only, oval track, for 410 Sprint Car andWOO,
tapped for Sander rear drive, lightweight gun drilled
core, for 55mm journals. Lift w/1.7:1 rocker arms.
Competition only, bracket racing, good upper RPM HP,
Super Pro, etc., auto trans w/race converter, oval track,
2-bbl or 4-bbl, 3/8-1/2 mile, 12.5 minimum compression
ratio advised.
Competition only, bracket racing, good mid to upper
RPM torque and HP, Super Pro, Super Gas, etc., auto trans
w/race converter, .960”base circle diameter, 12.5 minimum
compression ratio advised.
Competition only, bracket racing, good mid to upper
RPM torque and HP, Super Pro, Super Gas, etc., auto trans
w/race converter, 12.5 minimum compression ratio
advised. Lift with 1.65:1 rocker arms.
Competition only, bracket racing, good mid to upper
RPM torque and HP, Super Pro, Super Gas, etc., auto trans
w/race converter, 12.5 minimum compression ratio
advised.
Competition only, good w/large manifold nitrous system,
good upper RPM torque and HP, bracket racing, auto
trans w/race converter, 12.5 minimum compression ratio
advised. Good w/large Roots supercharger, 24 lbs. maximum
boost w/8.0 maximum compression ratio advised.
Competition only, drag racing, Super Stock, 350 cu.in.,
auto transmission w/race converter, lift with 1.8 intake,
1.6 exhaust rockers.
Camshaft Series/
Grind Number
RPM range shown is for average usage. These cam profiles
will RPM higher, depending upon application.
IMPORTANT: Self-aligning rocker arms cannot be used with
mechanical lifter roller camshafts.
NOTE: When using 55-56, 265 cu.in. blocks, late model cam bearings
must be installed.
IMPORTANT: AdjustableVacuum Advance Kits available. See page
333 for details.
NOTE: 1988-99 Chevrolet 305 and 350V-8 engines (and some 1987
350V-8 engines) use a different configuration camshaft core
than the 57-87 engines and cannot be interchanged.
262-267 (4.4L)-283-302-305 (5.0L)-307-327-350 (5.7L)-400 cu.
in. (also: 87-95 trucks w/standard [non-roller] hydraulic lifters)
RPM
POWER
RANGE
298-311-06RRD.95 4400-
8000
R-264/4381-2S-8 RB RD 4400-
8000
R-264/4381-2S-8LWDRD55J 4400-
8000
R-268/420-2S1-7 4600-
8200
Camshaft
PART NUMBER/
Emissions Code
See pg. 296
LIFTERS
CRANECAMS.COM
COMPLETE CAM SPECIFICATIONS
Degrees
Duration
@ .050”
Int/Exh.
Advertised
Degrees
Duration
Int/Exh.
Degrees
Lobe
Separation
Open/Close
@ .050”
Cam Lift
Int/Exh
Lash
Hot
Int.
Exh.
Gross
Lift
Int.
Exh.
19139 *a 11570-16 c 264 298 106 27 57 .012 .670
273 311 64.5 28.5 .030 .615
3
118771 *a 11570-16 c 264 296 108 26 58 .020 .745
268 300 66 22 .022 .745
3
118781 *a 11570-16 c 264 296 108 26 58 .020 .745
268 300 66 22 .022 .745
3
118871 *a 11519-16d 268 300 107 30 58 .020 .630
11570-16c 272 304 66 26 .020 .630
3
R-268/4467-2S-6.96 4400- 118421
8200
*a 11519-16d 268 298 106 31 57 .012 .670
R-268/4467-2S-6.96 SFO 118441 *a,b 11570-16c 276 314 67 29 .022 .625
R-268/452-2S-7 4400-
8200
R-270/420-2S8-6 4400-
8200
3
118791 *a 11570-16c 268 297 107 31 57 .020 .746
272 301 67 25 .022 .746
3
118881 *a 11570-16c 270 302 106 32 58 .020 .630
276 308 67 29 .020 .630
R-272/4334-2S2-10 4400-
3
118321
8200
*a 11570-16c 272 312 110 29 63 .026 .650
R-272/4334-2S2-10 SFO 118331 *a,b 282 322 74 28 .026 .641
R-272/428-2S-6 SFO 4600-
8200
3
118291 *a,b 11570-16 c 272 302 106 34 58 .020 .770
280 310 69 31 .014 .715
3
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. Drilling and tapping for
Sander rear drive is available. SFO firing order (1-8-7-3-6-
5-4-2, or 4/7 swap) and SFO1 (1-8-7-2-6-5-4-3), or 4/7 3/2
swap, are offered. Optional journal sizes are Roller Bearing
(1.875”), Big Block (1.949”), Large Roller Bearing/50mm
(1.969”), and 55mm (2.165”) Gun drilling (where applicable)
is available. Lightweight undercut journal, narrow
lobe cores are offered. Lobe layouts for Buick Race/Dart,
SplayedValve, and SB2 cylinder heads are available.
Since 1975, General Motors divisions have exchanged engines
throughout different models. Be certain of exactly which
engine you have before ordering.