Page 292 - 2021-22 Auto Performance_Circle Track
P. 292
Valve Setting
Advertised Duration
Duration @.050"
Lift with
1.5 Rockers Lobe Recommended Components
Application
Camshaft Part Number
Sep. Angle
Lifters
Solid - Short Track, 327-350, 2bbl. 2800-6300
Solid - Short 3/8-1/2 Mi. Track, 358, Late Model, 3000-7000 RPM
Solid - 3/8-1/2 Mi. Track, 358, Late Model, 3200-7000
Solid - 3/8-1/2 Mi. Track, 350-377, Open Rules, 3400-7000 RPM
Solid - Big 3/8-1/2 Mi. Track, 400+, Open Rules, 3500-7200 RPM
In.
.018"
.018"
.018"
.018"
.018"
Ex.
.020"
.020"
.020"
.020"
.020"
COM12-500-5
COM12-504-5
COM12-505-5
COM12-506-5*
COM12-515-5*
In.
276°
284°
284°
288°
288°
Ex.
280°
284°
288°
292°
296°
In.
246°
254°
254°
259°
259°
Ex.
250°
254°
259°
262°
266°
In.
.520"
.540"
.540"
.550"
.550"
Ex.
.530"
.540"
.550"
.560"
.570"
106°
106°
106°
106°
106°
Valve Springs
COM950-16
COM950-16
COM950-16
COM950-16
COM950-16
Steel Retainers
COM740-16
COM740-16
COM740-16
COM740-16
COM740-16
COM813-16
COM813-16
COM813-16
COM813-16
COM813-16
* Signifies camshaft also available nitrided for added durability. Simply replace “-5” suffix in part number with “-20”. Example: COM12-506-20.
4 & 7 Firing Order Swap
(18736542) Camshafts for SB Chevys
Valve Setting
Part No. Description
Advertised Duration
Duration @.050"
Lift with
1.5 Rockers Lobe Recommended Components
Application
† Requires upgraded gear, thrust button, and wear plate.
Camshaft Part Number
Sep. Angle
Lifters
Solid- 1/4-3/8, 327-358 2bbl. 3000-6800 RPM
Solid- 1/4-3/8, 327-358 4bbl. 3000-6700 RPM
Solid- 3/8-1/2, 360+4bbl. 3400-7200 RPM
Roller- Short Track/Small Engine, 4000-7000 RPM
Roller- Dirt Late Model 4bbl. 4400-7600 RPM
In.
.016"
.016"
.016"
.020"
.020"
Ex.
.018"
.018"
.018"
.022"
.022"
COM12-688-47
COM12-689-47
COM12-690-47
COM12-823-14†
COM12-826-14†
In.
278°
282°
290°
288°
288°
Ex.
284°
292°
300°
296°
296°
In.
248°
252°
260°
252°
258°
Ex.
250°
258°
266°
258°
264°
In.
.531"
.540"
.558"
.630"
.639"
Ex.
.525"
.537"
.549"
.630"
.632"
106°
106°
106°
106°
106°
Valve Springs
COM950-16
COM950-16
COM950-16
COM954-16
COM954-16
Titanium Retainers
COM730-16
COM730-16
COM730-16
COM731-16
COM731-16
COM813-16
COM813-16
COM813-16
COM818-16
COM818-16
COM812-16
Chevrolet, All V-8
COM832-16
SB Ford 289-351W
COM846-8
Ford 2300cc 4-Cyl.
COM2900-16
Chevrolet, All V-8
COM2910-16
SB Ford 302-351W, 1969-Up
Part No.
Description
Part No. Description
COM858-16
Chevrolet, All V-8
COM862-16*
SB Ford 289-351W
* Lifters require an adjustable valve train.
COM84000-16
Part No. Description
Application Dia.
Pushrod Seat Location
Needle Bearing Part No.
Bushing Part No.
Small Block Chevy
.842"
All Centered
COM96818-16
COM96818B-16
Small Block Chevy
.842"
(4) Pairs: Centered & .160" Left (4) Pairs: Centered & .160" Right
COM96894-16
COM96894B-16
Small Block Ford
.875"
All Centered
COM96838-16
COM96838B-16
COM800-16
Chevrolet, All V-8, .012" Hole
COM813-16
Chevrolet, All V-8
COM833-16
SB Ford 302-351W, 1969-Up
290 TRACK
CIRCLE 2021-22
