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461
1948-84 Big Twin Cams
Torrington Cam
Needle Bearings.
Genuine Torrington
replacements, features
full compliment roller
design. OEM# 9058.
Fits 1958-99 Big Twin.
VT No. 12-0316
SPECIFICATIONS
DURATION @ .053" GROSS VALVE
OPEN/CLOSE
a
LIFT
SERIES &
INT. EXH. INT. EXH. GRIND
VT No. YEAR
NUMBER
TYPE & APPLICATION
10-8252 1948-69 248
248 .455
b
.455
b
Hydraulic HYDRAULIC - Bolt-in. Broad power range for streetable performance. Works
10-8253 1970-77 24/44 44/24 .479
c
.479
c
300H Fireball well with stock compression or increased up to 10:1. Low and mid range
10-8254 1978-84
improvement. Does not require valve spring change. Works well with stock carb
Cam lift at TDC: Int: .126" Exh: .130"*
and exhaust or performance parts.
10-4380 1948-69 244
244 .455
b
.455
b
Fireball MECHANICAL - Bolt-in performance throughout the power range. Also
10-4381 1970-77 20/44 44/20 .479
c
.479
c
296A recommended for increased torque in heavy bikes with heavy loads. No spring
10-4382 1978-84
change required. Works well with stock carb and exhaust. Does not have Cranes
Cam lift at TDC: Int: .108" Exh: .108"*
multi-indexed gear. Replaces A.
10-4383 1948-69 256
256 .490
b
.490
b
Fireball MECHANICAL - Performance cam. Can be used with stock compression but
10-4384 1970-77 26/50 50/26 .516
c
.516
c
308B works well with 10.5:1 compression ratio. Mid range and top end improvement.
10-4385 1978-84
Heads must be clearanced and may require valve spring change to install. Works
Cam lift at TDC: Int: .129" Exh: .129"*
well with performance exhaust, carb and cylinder head work.
Replaces B.
244
244 .450
b
.450
b
Hydraulic HYDRAULIC - Bolt-in performance throughout the power range, Also recom-
10-4357 1970-77 22/42 42/22 .474
c
.474
c
Hi-Roller mended for increased torque in heavy bikes with heavy loads. No spring
10-4364 1978-84
Cam lift at TDC: Int: .125" Exh: .128"*H288B change required. Works well with stock carb and exhaust.
1948-69 244
254 .450
b
.450
b
Hydraulic HYDRAULIC - Mild performance. Can be used with stock springs, carb and
10-4358 1970-77 18/46 51/23 .474
c
.474
c
Hi-Roller exhaust or performance systems. Increased horsepower throughout RPM
10-4365 1978-84
Cam lift at TDC: Int: .110" Exh: .132"* H288-2B range.
10-4352 1948-69 254
264 .450
b
.450
b
Hydraulic HYDRAULIC - Performance can be used with performance type carb and
10-4359 1970-77 25/49 62/22 .474
c
.474
c
Hi-Roller exhaust. Increased mid-range and top end horsepower. Check valve-to-valve
10-4366 1978-84
Cam lift at TDC: Int: .137" Exh: .128"* H298-2B clearance.
1948-69 252
252 .450
b
.450
b
Hi-Roller MECHANICAL - Bolt-in mild performance. Can use stock springs, carb and
10-4361 1970-77 24/48 48/24 .474
c
.474
c
H298B exhaust. Increased mid-range and top end horsepower. No increase in com-
10-4368 1978-84
Cam lift at TDC: Int: .124" Exh: .124"*
precision ratio required.
10-4353 1948-69 262
262 .450
b
.450
b
Hi-Roller MECHANICAL - Mild performance. Works well with high performance carb and
10-4360 1970-77 29/53 53/29 .474
c
.474
c
H298B exhaust system. Can use stock springs, but check valve-to-valve clearance.
10-4367 1978-84
Cam lift at TDC: Int: .140" Exh: .140"*
10-4356 1948-69 266
266 .525
b
.525
b
Hi-Roller MECHANICAL - High performance street and drags. Increased compression
10-4363 1970-77 31/55 55/31 .553
c
.553
c
310B ratio and/or cubic inches required. Must change valve springs and check
1978-84
Cam lift at TDC: Int: .152" Exh: .155"*
spring travel, piston-to-valve, and valve-to-valve clearances.
10-4355 1948-69 268
268 .485
b
.485
b
Hi-Roller MECHANICAL - Streetable high performance. Increased compression ratio
10-4362 1970-77 32/56 56/32 .511
c
.511
c
304B and/or cubic inches required. Must change valve springs and check spring
10-4369 1978-84
Cam lift at TDC: Int: .152" Exh: .152"*
travel, piston-to-valve, and valve-to-valve clearances.
10-4371 1948-69 276
276 .550
b
.550
b
Hi-Roller MECHANICAL - Street and drag cam for high performance engines. Increased
10-4372 1970-77 36/60 64/32 .579
c
.579
c
320B cubic inches required for best results. Head work required for proper spring
1978-84
Cam lift at TDC: Int: .172" Exh: .160"*
travel, piston-to-valve, and valve-to-valve clearances.
10-4374 1948-69 286
286 .575
b
.575
b
Hi-Roller MECHANICAL - Drag cam for large cubic engines. Head work required for
10-4375 1970-77 41/65 73/33 .606
c
.606
c
330B proper spring travel, piston-to-valve, and valve-to-valve clearances, also to
10-4376 1978-84
Cam lift at TDC: Int: .192" Exh: .164"*
insure maximum performance.
Camshafts having over .450" valve lift in 1948-69 engines, will need to have front
exhaust lobe-to-circuit breaker drive gear clearance checked.
Camshafts having over .450" valve lift in 1948-57 engines, will need to have front intake lobe-to-case clearance checked.
* To convert cam lift to valve lift, multiply the cam lift figure by the rocker arm ratio: Shovelhead - 1.425; Panhead - 1.5.
a
Opening and closing figures for camshafts with the multiple keyway gear are based on the gear installed in the “0" position.
b
Gross valve lift for Shovelhead with 1.425 rocker arm ratio.
c
Gross valve lift for Panhead with 1.5 rocker arm ratio.
Note: All Crane Cams are shipped with red cam gear.
The Leader in Performance Technology
Sifton Cam Bushing
Kits. BT type includes
cam & gear shaft bush-
ings/bearings with lock
pins & thrust plate.
VT No. Year
10-8264 1936-53
10-8263 1954-57
10-8262 1958-69
VT No. Year
10-8261 1970-72
10-8260 1973-92