2011 - Crane Cams

CAMSHAFTS
Ford-Mercury V-8 62-87
202
Application
Mechanical Roller Camshafts
Good low end and mid range torque and HP, fair idle,
moderate performance usage, off road, bracket racing,
auto trans w/2500+ converter, 3400-3800 cruise RPM,
10.5 to 11.5 compression ratio advised.
Fair idle, moderate performance usage, good mid-range
torque and HP, bracket racing, good w/manifold nitrous
system, auto trans w/3500+ converter, 3800-4200 cruise
RPM, 10.5 to 12.0 compression ratio advised. Good w/
Roots supercharger, 16 lbs. max. boost w/8.0 max. compression
ratio advised.
Good mid range torque and HP, radical street, rough idle,
performance usage, oval track, bracket racing, auto trans
w/race converter, 11.0 to 12.5 compression ratio advised.
Good mid range to upper RPM torque and HP, 302+ cu.
in., rough idle, performance usage, oval track, bracket
racing, auto trans w/race converter, 11.5 minimum compression
ratio advised.
Performance usage, good mid to upper RPM HP, 302+
cu.in., long oval track, bracket racing, auto trans w/race
converter, 12.0 minimum compression ratio advised.
Competition only, good upper RPM HP, 302+ cu.in.,
bracket racing, Heavy, Street, etc., auto trans w/race converter,
aftermarket aluminum cylinder heads advised,
12.5 minimum compression ratio advised.
Camshaft Series/
Grind Number
RPM range shown is for average usage. These cam profiles
will RPM higher, depending upon application.
IMPORTANT: Adjustable Vacuum Advance Kit available. See page
333 for details.
NOTE: Many 1985-87 302 engines, all 88-97 302 passenger
car engines, all 96-00 302 truck engines, all 85-95 302
H.O., and all 94-97 351 Windsor engines are equipped
with hydraulic roller camshafts and lifters. Conventional
hydraulic, mechanical, or roller camshafts and lifters can be
easily installed in these engines, providing the appropriate
kit components are used.
NOTE: Specify if heads with 5/16” valve stems are used. These valve
springs and retainers cannot be used with short valve stem
heads.
RPM
POWER
RANGE
SR-238/350-2S-12 2800-
6600
SR-246/362-2S-10 3400-
7000
R-252/420-2S-8 3600-
7400
R-258/420-2S-8 3800-
7600
R-262/420-2S3-8 4200-
7800
R-268/420-2S1-8 4800-
8200
221-255 (4.2L)-260-289-302 (5.0L) cu.in. and
88-95 302 cu.in. trucks (exc. 82-95 302 [5.0L] HO)
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.
368511 *a,b 44518-16 238 288 112 12 46 .020 .560
44570-16 d 246 296 60 6 .020 .579
3
368601 *a,b 44518-16 246 296 110 18 48 .020 .579
44570-16d 254 304 62 12 .020 .598
3
448801 *a,b,c 44518-16 252 284 108 22 50 .020 .672
44570-16 d 258 290 61 17 .020 .672
3
448831 *a,b,c 44518-16 258 290 108 25 53 .020 .672
44570-16 d 262 294 63 19 .020 .672
3
448841 *a,b,c 44518-16 262 294 108 27 55 .020 .672
44570-16 d 268 300 66 22 .020 .672
3
448851 *a,b,c 44518-16 268 300 108 30 58 .020 .672
44570-16 d 272 304 68 24 .020 .672
3
NOTE: Ford 221 thru 302 camshafts can be used in 351 Windsor
engines if the engine is changed to 221 thru 302
firing order (1-5-4-2-6-3-7-8). Ford 351W firing order is
1-3-7-2-6-5-4-8.
NOTE: To effect valve adjustment when using roller lifter camshafts,
the heads must be machined to accept screw-in studs
(on engines not originally equipped).
IMPORTANT: Crane offers a Pushrod Guideplate and Rocker Arm
Stud Conversion Kit (36655-16) for street applications,
enabling the 1977-00 255 and 302 cu.in. engines with
pedestal mounted rockers to have adjustable rocker arms
without cylinder head removal or machining. Refer to page
325 for details.
NOTE: Many 1972 and later Ford-Mercury V-8 engines are
originally equipped with a retarded crankshaft sprocket. This
may cause idling and performance problems when installing
aftermarket camshafts. We recommend using our 44975-1
or 44984-1 timing chain and gear assemblies, a pre-1972
crankshaft sprocket, or by degreeing in your camshaft. The
non-retarded sprocket will have the alignment dot and
keyway slot directly in line with each other.
NOTE: These camshafts also fit the 1969-70 Ford-Mercury Boss
302 V-8 engines. Some kit components will differ. Contact
Crane’s Performance Consultants for details.