2011 - Crane Cams

CAMSHAFTS
Chevrolet V-8 57-87
86
Application
Mechanical Roller Camshafts
Competition only, good upper RPM torque and HP, bracket
racing, 360+ cu.in., .900" base circle diameter, auto
trans w/race converter, 12.5 minimum compression ratio
advised.
Competition only, bracket racing, good upper RPM HP,
Super Pro, Super Gas, etc., auto transmission w/race converter,
12.5 minimum compression ratio advised.
Competition only, high RPM maximum performance
applications, Super Stock/Competition Eliminator, 292-
340 cu.in., etc., stick or auto transmission w/race converter,
for 55mm journals, 14.0 minimum compression
ratio advised. Lift w/1.8:1 intake rocker arms.
Competition only, drag racing, Super Stock, 350 cu.in.,
auto transmission w/race converter, lift with 1.65:1 rocker
arms.
Competition only, bracket racing, good upper RPM HP,
Super Quick, Super Comp, etc., auto transmission w/race
converter, 12.5 minimum compression ratio advised.
Competition only, good upper RPM HP, Super Stock,
Super Quick, stick or auto transmission w/race converter,
12.5 minimum compression ratio advised.
Competition only, 370+ cu.in., Super Quick, etc., stick or
auto transmission w/race converter, good w/large multistage
nitrous system, 13.0 minimum compression ratio
advised. Good w/large Roots supercharger, 30 lbs. maximum
boost w/8.0 maximum compression ratio advised.
Competition only, high RPM maximum performance
applications, Competition Eliminator, 292-340 cu.in., etc.,
Super Quick w/400+ cu.in., stick or auto transmission w/
race converter, 14.0 minimum compression ratio advised.
Lift w/1.65 rocker arms.
Competition only, high RPM Competition Eliminator, stick
or auto transmission w/race converter, 14.0 minimum
compression ratio advised. Lift w/1.65 rocker arms.
Competition only, high RPM maximum performance
applications, good w/large multi-stage nitrous system,
388+ cu.in., Super Quick, etc., stick or auto transmission
w/race converter, 14.0 minimum compression ratio
advised. Good w/large Roots supercharger, 388+ cu.in.,
35 lbs. maximum boost with 7.5 maximum compression
ratio advised. Lift w/1.65 rocker arms.
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
R-274/4541-2S-6.90 4600-
8200
R-276/420-2S1-6 4600-
8400
R-276/5152-2S-14SFO55J 6000-
9800
R-278/452-2S2-6 SFO 4800-
8400
R-280/420-2S-8 5000-
8600
R-280/450-2S-8 5000-
8600
R-282/4765-2S2-10 5000-
8600
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.
118801 *a 11570-16 c 274 305 106 35 59 .020 .681
282 313 71 31 .022 .681
3
118891 *a 11570-16 c 276 308 106 35 61 .020 .630
284 316 71 33 .020 .630
3
118991 *a,b 11570-16 c 276 306 114 29 67 .020 .927
11574-16 d 292 326 83 29 .026 .720
3
118961 *a,b 11570-16 c 278 307 106 37 61 .020 .746
11574-16 d 284 313 72 32 .022 .746
3
118901 *a 11570-16 c 280 312 108 36 64 .020 .630
284 316 74 30 .020 .630
3
118361 *a 11570-16 c 280 320 108 35 65 .026 .675
11574-16 d 284 324 73 31 .026 .641
3
118381 *a 11570-16 c 282 316 110 36 66 .035 .715
11574-16 d 290 324 80 30 .030 .688
3
R-282/4765-2S2-12 6000- 118451
9400
*a 11570-16c 282 316 112 34 68 .035 .786
R-282/4765-2S2-12 SFO 118461 *a,b 11574-16d 290 324 82 28 .030 .757
R-282/5002-2S-13 SFO 6000-
9600
3
118491 *a,b 11570-16 c 282 312 113 33 69 .020 .825
11574-16 d 290 330 83 27 .030 .776
3
R-286/4765-2S3-12 6000- 118471
9800
*a 11570-16c 286 320 112 36 70 .035 .786
R-286/4765-2S3-12 SFO 118481 *a,b 11574-16d 294 328 84 30 .030 .757
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.