Page 291 - 2021-22 Auto Performance_Circle Track
P. 291
Oval Racing Camshafts for SB Chevys
Comp Cams offers a wide variety of camshaft
Valve Setting
Application
Advertised Duration
Duration @.050"
Lift with
1.5 Rockers Lobe
Sep. Angle
Recommended Components Lifters
Camshaft Part Number
Hydraulic - Heavy Car/Short Track, Stock Valve Train, 3000-6000 RPM
Hydraulic - 1/4 to 3/8 Mi. Track, Broad Torque Range, 3500-6300 RPM
Hydraulic - 3/8 to 1/2 Mi. Track, 350 and Larger Engine, 3700-6500 RPM
Solid - .470" Lift Rule, Rough Idle, Low Vacuum
Solid, 1/4-3/8 Tight Track, 327-358 2bbl. 9:1 Comp.
Solid, 1/4-3/8 Fast Track 327-358 2bbl. 9:1 Comp.
Solid - 1/4-3/8, 327-358 2bbl. 3000-6800
Solid - 1/4-3/8, 327-358 2bbl. 3200-7000
Solid, 1/4-3/8 Tight Track, 327-358 4bbl. 12:1 Comp.
Solid, Late Model Stock, 1/4-3/8 Track, 358 Limited
Solid - 1/4 to 3/8 Mi. Track, Good All-Around Cam, 3000-6500 RPM
Solid - 3/8-1/2, 358+, 3400-7400
Solid - Fast 1/4 to 3/8 Mi. Track, Broad Torque Range, 3500-6800 RPM
Solid - Fast Cornered 1/4 to 3/8 Mi. Track, Good Top End, 3700-7000 RPM
360+ Solid, 3/8-1/2 Tight Track, 4bbl. 12:1+ Comp.
Solid - 3/8- 1/2 Fast Track, 360+ 4bbl. 12:1 Comp.
Roller - 1/4-3/8 Mi. Track, Tight Corners, 3500-6500
Roller - 1/4-1/2 Mile Track, 355-377 4BBL Late Model, Big Heads
Roller - 1/4-3/8 Mi. Track, 355, Late Model, 3000-7000
Roller - ARCA 358, 6200-8500
Roller - .900" Base Circle
383-415 cu. in., Late Model, Mod., 3400-7600 RPM
Roller - .900" Base Circle
415-430 cu. in., Great Bottom End, 3400-7600 RPM
Roller - .900" Base Circle
Late Model, Lg. Engine, Slick Track, 4500-7500 RPM
Roller-.900" Base Circle
358 C.I., Open Carb, 6200-8500 RPM
In.
Hyd.
Hyd.
Hyd.
.018"
.016"
.016"
.016"
.016"
.016"
.016"
.020"
.016"
.020"
.020"
.016"
.016"
.020"
.016"
.020"
.020"
.016"
.016"
.020"
.020"
Ex.
Hyd.
Hyd.
Hyd.
.018"
.018"
.018"
.018"
.018"
.018"
.018"
.022"
.018"
.022"
.022"
.018"
.018"
.022"
.016"
.022"
.022"
.020"
.020"
.022"
.022"
COM12-325-4
COM12-330-4
COM12-344-5
COM12-523-5
COM12-650-5
COM12-651-5
COM12-652-5
COM12-653-5*
COM12-656-5*
COM12-654-5*
COM12-609-5*
COM12-655-5
COM12-610-5*
COM12-611-5*
COM12-658-5
COM12-659-5
COM12-901-9†
COM12-857-9†
COM12-940-9†
COM12-906-9†
COM12-861-9†
COM12-863-9†
COM12-890-9†
COM12-996-9†
In.
280°
286°
296°
270°
274°
278°
278°
282°
282°
286°
285°
290°
290°
290°
290°
294°
292°
283°
290°
312°
287°
291°
292°
312°
Ex.
288°
292°
305°
282°
280°
284°
284°
288°
292°
292°
295°
296°
304°
304°
300°
304°
296°
287°
300°
322°
300°
304°
308°
322°
In.
232°
236°
246°
242°
244°
248°
248°
252°
252°
256°
250°
256°
255°
255°
260°
264°
256°
255°
260°
276°
259°
263°
264°
276°
Ex.
237°
244°
253°
250°
246°
250°
250°
254°
258°
258°
260°
262°
266°
266°
266°
270°
258°
259°
264°
284°
268°
272°
272°
284°
In.
.483"
.490"
.510"
.473"
.519"
.531"
.531"
.540"
.540"
.549"
.532"
.558"
.540"
.540"
.558"
.567"
.630"
.645"
.645"
.630"
.648"
.648"
.660"
.630"
Ex.
.483"
.485"
.525"
.473"
.519"
.525"
.525"
.531"
.537"
.537"
.555"
.543"
.534"
.534"
.549"
.555"
.630"
.645"
.630"
.630"
.645"
.645"
.630"
.630"
108°
108°
106°
106°
108°
108°
106°
106°
106°
108°
106°
108°
104°
106°
106°
106°
106°
106°
106°
107°
107°
108°
106°
107°
Valve Springs
COM986-16
COM986-16
COM986-16
COM983-16
COM950-16
COM950-16
COM950-16
COM950-16
COM950-16
COM950-16
COM987-16
COM950-16
COM987-16
COM987-16
COM950-16
COM950-16
COM943-16
COM26089-16
COM943-16
COM943-16
COM26089-16
COM26089-16
COM943-16
COM943-16
Titanium Retainers
COM740-16
COM740-16
COM740-16
COM740-16
COM740-16
COM740-16
COM730-16
COM730-16
COM740-16
COM740-16
COM740-16
COM730-16
COM740-16
COM740-16
COM740-16
COM740-16
COM731-16
COM731-16
COM731-16
COM731-16
COM731-16
COM731-16
COM731-16
COM731-16
COM858-16
COM858-16
COM858-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
COM818-16
COM818-16
COM818-16
COM818-16
COM891-16
COM891-16
COM891-16
COM891-16
† Requires upgraded gear, thrust button, and wear plate.
* Signifies camshaft also available nitrided for added durability. Simply replace “-5” suffix in part number with “-20”. Example: COM12-611-20.
Valve Setting
Advertised Duration
Duration @.050"
Lift with
1.6 Rockers Lobe
Sep. Angle
Recommended Components Lifters
289
Application
Camshaft Part Number
Solid - IMCA Std. Rocker Ratio, 3/8 - 5/8 Tracks, 355+ cu. in. 12:1 Comp.,
Gas or Alcohol 4bbl. 3300-7300 RPM
Roller - Outlaw Modified, 3/8 - 5/8 Tracks, 355+ cu. in. 12:1 Comp., Gas or Alcohol 2/4bbl., 3200-7500 RPM
4 & 7 Firing Order Swap Applications
Roller, 1/3-1/2 Track, 355-383 4bbl., 11:1 Comp.
Roller, 3/8-5/8 Track, 355-383 4bbl., 12:1 Comp.
In.
.016"
.016"
.016"
.016"
Ex.
.018"
.018"
.018"
.018"
COM12-527-5
COM12-780-9†
COM12-841-14†
COM12-842-14†
In.
284°
287°
289°
293°
Ex.
293°
291°
298°
302°
In.
258°
256°
260°
264°
Ex.
264°
260°
265°
269°
In.
.597"
.589"
.709"
.715"
Ex.
.606"
.589"
.694"
.698"
107°
107°
107°
107°
Valve Springs
COM950-16
COM943-16
—
—
Titanium Retainers
COM732-16
COM731-16
COM738-16
COM738-16
COM813-16
COM818-16
—
—
† Requires upgraded gear, thrust button, and wear plate.
TRACK
CIRCLE 2021-22
