Page 275 - 2019-2020 Racecar Engineering Circle Track Parts and Accessories Catalog

Tight Lash Camshafts For SB Chevys
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Valve Advertised Duration Lift With
Setting Duration @.050" 1.5 Rockers Lobe Recommended Components
Camshaft Sep. Valve Steel
Application In. Ex. Part Number In. Ex. In. Ex. In. Ex. Angle Springs Retainers Lifters
Solid - Short Track, 327-350, 2bbl, 2800-6300 .018" .020" COM12-500-5 276° 280° 246° 250° .520" .530" 106° COM950-16 COM740-16 COM813-16
Solid - Short 3/8-1/2 Mi. Track, 358, Late Model, .018" .020" COM12-504-5 284° 284° 254° 254° .540" .540" 106° COM950-16 COM740-16 COM813-16
3000-7000 RPM
Solid - 3/8-1/2 Mi. Track, 358, Late Model, 3200-7000 .018" .020" COM12-505-5 284° 288° 254° 259° .540" .550" 106° COM950-16 COM740-16 COM813-16
Solid - 3/8-1/2 Mi. Track, 350-377, .018" .020" COM12-506-5* 288° 292° 259° 262° .550" .560" 106° COM950-16 COM740-16 COM813-16
Open Rules, 3400-7000 RPM
Solid - Big 3/8-1/2 Mi. Track, 400+,
Open Rules, 3500-7200 RPM .018" .020" COM12-515-5* 288° 296° 259° 266° .550" .570" 106° COM950-16 COM740-16 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
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Valve Advertised Duration Lift With
Setting Duration @.050" 1.5 Rockers Recommended Components
Lobe
Camshaft Sep. Valve Titanium
Application In. Ex. Part Number In. Ex. In. Ex. In. Ex. Angle Springs Retainers Lifters
Solid- 1/4-3/8, 327-358 2bbl, 3000-6800 RPM .016" .018" COM12-688-47 278° 284° 248° 250° .531" .525" 106° COM950-16 COM730-16 COM813-16
Solid- 1/4-3/8, 327-358 4bbl, 3000-6700 RPM .016" .018" COM12-689-47 282° 292° 252° 258° .540" .537" 106° COM950-16 COM730-16 COM813-16
Solid- 3/8-1/2, 360+4bbl, 3400-7200 RPM .016" .018" COM12-690-47 290° 300° 260° 266° .558" .549" 106° COM950-16 COM730-16 COM813-16
Roller- Short Track/Small Engine, 4000-7000 RPM .020" .022" COM12-823-14 288° 296° 252° 258° .630" .630" 106° COM954-16 COM731-16 COM818-16
†
Roller- Dirt Late Model 4bbl, 4400-7600 RPM .020" .022" COM12-826-14 288° 296° 258° 264° .639" .632" 106° COM954-16 COM731-16 COM818-16
†
† Requires upgraded gear, thrust button, and wear plate.
High Energy Hydraulic Lifters Performance Series Solid Lifters
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COM812-16 Chevrolet, All V-8 RI
COM832-16 SB Ford 289-351W Part No. Description
COM846-8 Ford 2300cc 4-Cyl. COM2900-16 Chevrolet, All V-8
COM2910-16 SB Ford 302-351W, 1969-Up
Pro Magnum Hydraulic Lifters
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COM858-16 Chevrolet, All V-8 WR WKH D[OH DQG D VLQJOH HGJH RUL¿FH
COM862-16* SB Ford 289-351W IHHG WR WKH ZKHHO IRU LPSURYHG
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VHWV RI Application Dia. Seat Location Part No. Part No.
Small Block
Chevy .842" All Centered COM96818-16 COM96818B-16
Solid Lifters (4) Pairs:
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DQG WKH RLO PHWHULQJ EDQG PLOOHG WR HOLPLQDWH H[FHV Chevy .842" (4) Pairs: COM96894-16 COM96894B-16
VLYH RLO EHLQJ SXPSHG WR WKH WRS RI WKH HQJLQH Centered & .160" Right
6ROG LQ VHWV RI Small Block Ford .875" All Centered COM96838-16 COM96838B-16
Part No. Description
COM800-16 Chevrolet, All V-8, .012" Hole
COM813-16 Chevrolet, All V-8
COM833-16 SB Ford 302-351W, 1969-Up
2019-20 CIRCLE TRACK PARTS AND ACCESSORIES 271