496
1948-84 Big Twin Cam
Competition Cams
VT No.
Year
Application
Hydraulic
P/N
Duration
@ 053
Valve Lift
Valve Timing
Open/Close
Lift @ TDC
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
Intake
Exhaust
10-5009
78-84
70-77
Very good torque and mid-
range. Good roll on power.
SHV4000
236
236
.450”
.450”
14/42
42/14
.093”
.093”
10-5010
SHV-4001
10-5011
78-84
Good torque strong mid-
range and good roll on power.
SHV4010
236
236
.485”
.485”
14/42
42/14
.093”
.093”
10-5016
70-77
Performance cam. Use with carb,
pipes and valve springs.
SHV-4031
252
252
.485”
.485”
22/50
50/22
.120”
.120”
VT No.
Year
Grind
Timing
Duration
@ .053
Valve Lift
Application
Shovel
Pan
CAMS FOR STREET AND DRAG APPLICATIONS
-6/46
220
.390
.412
Stock H/D front cylinder timing
Stock (Front Cyl.) H/D Cams
44/20
244
.390
.412
Listed for Comparison
14/38
232
.390
.412
Stock H/D front cylinder timing
Stock (Rear Cyl.) H/D Cams
44/20
244
.390
.412
Listed for Comparison
10-2011
10-2020
10-2030
1948-69
1970-77
1978-84
J
21/41
242
.405
.425
Mild street; Panheads and Shovelheads, smooth idle more power through
R.P.M. range. Bolts in with no head work.
10-2260
10-2263
10-2267
1948-69
1970-77
1978-84
A2
19/43
242
.450
.470
Bolt in cam that requires no head work. More mid range and hi end power. Idle unaffected.
10-2310
10-2320
10-2331
1948-69
1970-77
1978-84
AB
21/43
244
.450
.470
“A” Intake and long duration exhaust for cooler running and more high-end power.
Both in street cam (except 80-81).Okay. for Hydraulic Lifters.
10-2351
10-2353
10-2358
1948-69
1970-77
1978-84
B2
26/50
256
.485
.507
Street Drags: More mid range and high end power, smooth idle. Best cam for modified 74/80
cubic inch and small strokers. Spring spacing required.
10-2430
10-2440
1970-77
1978-84
BH
24/52
256
.450
.470
Hydraulic version of a “B” cam. Usually a bolt in but spring spacing may be required on 1980-81
Shovelheads.
10-2265
10-2266
1948-69
1970-77
1978-84
7
29/53
262
.510
.535
Upgraded version of original #6 Grind. Great street cam for 84/88 inch strokers. Maximum
Torque available from 2200 to 6500 R.P.M
10-2600
10-2610
10-2620
1948-69
1970-77
1978-84
C
37/61
278
.525
.550
Best production cam made for big street engines. Strokers from 84” to 96” will really turn on with
this cam. Broad torque range pulls from 2000 to 7000+ R.P.M.
CAMS FOR LOW COMPRESSION ENGINES
10-2420
1948-69
B
Bolt In
10-2130
10-2140
10-2150
1948-69
1970-77
1988-84
1
16/36
232
.427
.450
This is the low compression piston version of “A” grind cam for 74 and 80 cubic inch for engines
with 7.5 compression pistons.
10-2350
1978-84
2
15/35
230
.490
.512
Low compression piston version of a “B” grind cam. Cam features more power through R.P.M.
range
10-2630
10-2640
10-2650
1948-69
1970-77
1978-84
3
23/43
246
.514
.540
High lift, short duration for motors 84 cubic inch engines or larger. More power for small strokers
with 7.5 compression pistons
HIGH PERFORMANCE & DRAGSTER CAMS
10-2740
10-2750
1948-69
1970-77
1978-84
M
28/56
264
.590
.210
Street Drags: 88+ cubic inch engines maximum mid-range torque cam 3000/6500 RPM. OK for low
compression on street. Andrews springs and collars make installation easy.
10-2850
10-2860
10-2870
1948-69
1970-77
1978-84
9
32/64
276
.530
.222
Drags: Broad tip design for maximum mid-range power for strokers from 88 cubic inches and larg-
er. Requires Andrews springs and collars for head set up and installation.
10-2890
10-2900
1948-69
1970-77
10
34/70
70/34
284
284
.580
.580
.230
Maximum output dragster cam for BIG motors from 92” cubic inch and up.
This cam is for best torque up to 6500 R.P.M. Requires Andrews springs and collars.
VT No.
Year
Specifications
Series
Grind
Number
TYPE & APPLICATION
DURATION @ .053”
Gross Valve Lift
OPEN/CLOSE
a
INT.
EXH.
INT.
EXH.
10-4374
1948-69
286
286
.575
b
.575
b
Hi-Roller
330B
MECHANICAL - Drag cam for large cubic engines. Head work required for proper spring travel,
piston-to-valve, and valve-to-valve clearances, also to insure maximum performance Camshafts
having over .450” valve lift in 1948-69 engines, will need to have front
41/65
73/33
.606
c
.606
c
Cam lift at TDC: Int: .192” Exh: .164”*
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