2011 - Crane Cams

CAMSHAFTS
Chevrolet V-8 01-08
146
Application
Hydraulic Roller Camshafts
Brute low end torque, smooth idle, daily usage, fuel
economy, towing, mild marine usage, 1600-2200
cruise RPM, 8.0 to 9.5 compression ratio advised.
Excellent low end torque and HP, good idle, daily
usage, off road, towing, performance and fuel efficiency,
computer upgrades may be required, 2600-
3000 cruise RPM, 8.75 to 10.5 compression ratio
advised. Marine performance usage with free flowing
above water exhaust system.
Good mid range torque and HP, good idle, moderate
performance usage, mild supercharged, computer
upgrades required, 8.75 to 10.5 compression ratio
advised. Marine performance usage with free flowing
above water exhaust system.
Good mid range torque and HP, fair idle, moderate
performance usage, mild supercharged, computer
upgrades required, 9.0 to 11.0 compression ratio
advised. Marine performance usage in modified
engines with aftermarket high flow abovve water
exhaust systems.
Good mid range HP, fair idle, performance usage,
computer upgrades required, 9.5 to 11.0 compression
ratio advised. Marine performance usage w/ modified
engines having aftermarket dry pipe exhaust systems.
Good mid range HP, rough idle, performance usage,
mild supercharged, computer upgrades required, 10.0
to 11.5 compression ratio advised. Marine performance
usage with modified engines having aftermarket
dry pipe exhaust systems.
Good upper RPM HP, rough idle, performance usage
for increased displacement engines, computer
upgrades required, 10.0 to 11.0 compression ratio
advised. Marine performance for highly modified
engines with aftermarket dry pipe exhaust or tube
headers.
RPM range shown is for average usage. These cam profiles
will RPM higher, depending upon application.
Camshaft Series/
Grind Number
IMPORTANT NOTE: Crane Hydraulic Roller Cams offer tremendous
power, torque and RPM potential. Due to their RPM capability
and increased valve travel it is HIGHLY RECOMMENDED
that the appropriate Crane valve train components be
installed for maximum performance and reliability.
RPM
POWER
RANGE
HR-208/292-2S-16 IG 800-
4600
HR-216/325-2S-14 IG 1200-
5000
HR-222/339-2S-12 IG 1400-
5400
HR-226/345-2S-14 IG 1600-
5600
HR-230/352-2S-14 IG 1800-
5800
HR-236/359-2S1-14 IG 2200-
6000
HR-240/365-2S-12 IG 2600-
6200
Camshaft
PART NUMBER/
Emissions Code
See pg. 294
LIFTERS
NOTE: For best performance and reliability, these engines should
be converted to adjustable rocker arms by installing
99155-16 rocker arm studs (no machining required) and
appropriate rocker arms. Custom length pushrods can also
be made to achieve correct lifter preload if standard nonadjustable
rocker arms are retained. See page 305 for special
pushrod ordering instructions and page 374 for checking
your hydraulic lifter preload.
Since 1975, General Motors divisions have exchanged engines
throughout different models. Be certain of exactly which
engine you have before ordering.
CRANECAMS.COM
8.1 Litre L18 (Vortec 8100)
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.
268701 *a 26535-16 b 208 264 116 (7) 35 .000 .496
214 270 48 (14) .000 .512
3
268711 *a 26535-16b 214 276 114 (2) 36 .000 .553
220 241 49 (9) .000 .564
3
268721 *a 26535-16 b 222 284 112 4 38 .000 .576
230 292 52 (2) .000 .598
3
268731 *a 26535-16 b 226 288 114 4 42 .000 .587
234 296 56 (2) .000 .610
3
268761 *a 26535-16 b 230 292 114 6 44 .000 .598
236 298 57 (1) .000 .610
3
268741 *a 26535-16b 236 298 114 9 47 .000 .610
244 306 61 3 .000 .632
3
268771 *a 26535-16 b 240 302 112 13 47 .000 .621
248 310 61 7 .000 .632
3