2011 - Crane Cams
2011 - Crane Cams
2011 - Crane Cams
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CAMSHAFTS<br />
Chevrolet V-8 67-95<br />
136<br />
Application<br />
Mechanical Roller <strong>Cams</strong>hafts<br />
Competition only, good upper RPM HP, 500+ cu.in.,<br />
bracket racing, auto trans w/race converter, good w/<br />
large manifold nitrous system, 12.5 minimum compression<br />
ratio advised. Good w/large Roots supercharger,<br />
24 lbs. maximum boost w/8.0 maximum<br />
compression ratio advised.<br />
Radical competition only, good upper RPM HP, 500+<br />
cu.in., bracket racing, Pro Street, auto trans w/race<br />
converter, intended for large manifold nitrous system,<br />
12.5 minimum compression ratio advised.<br />
Competition only, good upper RPM torque and HP, 540+<br />
cu.in., bracket racing w/heavy car, auto trans w/race<br />
converter, marine performance, good w/manifold<br />
nitrous system, 12.5 minimum compression ratio<br />
advised. Good w/large Roots supercharger, 24 lbs. maximum<br />
boost w/8.0 maximum compression ratio advised.<br />
Competition only, bracket racing, good upper RPM<br />
torque and HP, Super Pro, Super Gas, Super Comp, etc.,<br />
427-468 cu.in., auto trans w/race converter, 12.5 minimum<br />
compression ratio advised.<br />
Competition only, good upper RPM torque and HP,<br />
540+ cu.in., bracket racing, auto trans w/race converter,<br />
good w/manifold nitrous system, 12.5 minimum<br />
compression ratio advised. Good w/large Roots<br />
supercharger, 26 lbs. maximum boost w/8.0 maximum<br />
compression ratio advised.<br />
Competition only, bracket racing, good upper RPM HP,<br />
Super Pro, Super Comp, etc., 454+ cu.in., auto trans<br />
w/race converter, 12.5 minimum compression ratio<br />
advised.<br />
Radical competition only, good upper RPM HP, 540+<br />
cu.in., bracket racing, Pro Street, auto trans w/race<br />
converter, intended for large manifold nitrous system,<br />
13.5 minimum compression ratio advised.<br />
Competition only, drag racing Super Stock, 396-427<br />
high compression. Lift with 1.75 intake, 1.7 exhaust<br />
rockers.<br />
Competition only, good upper RPM HP, single 4-bbl,<br />
Comp. Elim., 427+ cu.in., strong mid range for 540+<br />
cu.in. Super Gas and Super Comp, auto transmission<br />
w/race converter, 13.0 minimum compression ratio<br />
advised.<br />
RPM range shown is for average usage. These cam profiles<br />
will RPM higher, depending upon application.<br />
<strong>Cams</strong>haft Series/<br />
Grind Number<br />
IMPORTANT: AdjustableVacuum Advance Kits available. See page<br />
333 for details.<br />
IMPORTANT NOTE: 1991-95 GenV engines can use these camshafts<br />
and components if they are converted to adjustable<br />
rocker arms by machining the cylinder heads for 99157-16<br />
7/16”screw-in studs and 13650-1 pushrod guideplates, and<br />
installing appropriate rocker arms.<br />
RPM<br />
POWER<br />
RANGE<br />
<strong>Cams</strong>haft<br />
PART NUMBER/<br />
Emissions Code<br />
See pg. 296<br />
LIFTERS<br />
NOTE: Many options are available for these camshafts, and any of<br />
our custom ground camshafts. An iron distributor drive gear<br />
and rear journal can be specified. SFO firing order (4/7 swap)<br />
is offered. Optional journal sizes are: Roller Bearing (1.968”),<br />
2.125”, and 55mm (2.165”). Gun drilling (where applicable)<br />
is available. <strong>Cams</strong>hafts for the GM DRCE family ofV-8’s are<br />
also offered in 55mm and 60mm journal versions.<br />
CRANECAMS.COM<br />
396-402-427-454 cu.in.<br />
COMPLETE CAM SPECIFICATIONS<br />
Degrees<br />
Duration<br />
@ .050”<br />
Int/Exh.<br />
Advertised<br />
Degrees<br />
Duration<br />
Int/Exh.<br />
Degrees<br />
Lobe<br />
Separation<br />
Open/Close<br />
@ .050”<br />
Cam Lift<br />
Int/Exh<br />
R-274/4334-2S-14 4600- 138351<br />
8200<br />
*a 13570-16d 274 314 114 26 68 .026 .737<br />
R-274/4334-2S-14 SFO 138361 *a,b 13574-16e 284 324 79 25 .026 .726<br />
R-274/5002-2S-14 SFO 4600-<br />
8600<br />
R-278/420-2S-10 4600-<br />
8000<br />
3<br />
Lash<br />
Hot<br />
Int.<br />
Exh.<br />
138931 *a,b 13570-16 d 274 304 114 28 66 .020 .850<br />
13574-16 e 300 331 89 31 .016 .818<br />
R-276/420-2S1-14 4600-<br />
3<br />
138451<br />
8200<br />
*a 13570-16d 276 308 114 28 68 .020 .714<br />
R-276/420-2S1-14 IG 138461 *c 13574-16e 280 312 78 22 .020 .714<br />
R-278/420-2-14 IG 4600-<br />
8200<br />
R-282/420-2-12 4800-<br />
8200<br />
R-282/490-2S2-13 SFO 4800-<br />
8600<br />
R-282/5002-2S-10 SFO 5000-<br />
8200<br />
3<br />
NOTE: In order to use these cams in 65-66 engines, you must<br />
groove the center of the rear cam bearing journal, 3/16”<br />
wide and 7/64”deep.<br />
Since 1975, General Motors divisions have exchanged engines<br />
throughout different models. Be certain of exactly which<br />
engine you have before ordering.<br />
Gross<br />
Lift<br />
Int.<br />
Exh.<br />
138851 *a 13570-16 d 278 310 110 33 65 .020 .714<br />
13574-16 e 282 314 75 27 .020 .714<br />
3<br />
138471 *c 13570-16d 278 310 114 29 69 .020 .714<br />
13574-16e 288 320 82 26 .020 .714<br />
3<br />
138861 *a 13570-16 d 282 314 112 33 69 .020 .714<br />
13574-16 e 292 324 81 31 .020 .714<br />
3<br />
138941 *a,b 13570-16 d 282 318 113 33 69 .026 .833<br />
13574-16 e 304 339 88.5 35.5 .022 .772<br />
3<br />
138711 *a,b 13570-16 d 282 312 110 36 66 .020 .875<br />
13574-16 e 286 330 78 28 .030 .800<br />
3<br />
R-284/456-2S1-10 4800- 138591<br />
8200<br />
*a 13570-16d 284 324 110 35 69 .026 .775<br />
R-284/456-2S1-10 SFO 138701 *a,b 13574-16e 292 332 79 33 .026 .723<br />
3
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