Page 247 - 2017 Racecar Engineering Circle Track Parts and Accessories Catalog

TIGHT LASH CAMSHAFTS FOR SB CHEVYS
The “Tight Lash” series is a line of race only, flat tappet camshafts that work well in circle track engines. Ramps ac cel er ate the valve to a higher speed as it goes
up to the nose, and set it down at a controlled speed on the seat. Significant power increases can be gained over earlier styles, with no sac ri fice in the “off-the-
corner” characteristics.
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,
Open Rules, 3400-7000 RPM .018" .020" COM12-506-5* 288° 292° 259° 262° .550" .560" 106° COM950-16 COM740-16 COM813-16
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
Leading engine builders have been having 4 & 7 swap camshafts custom ground for many years in the pursuit of added horsepower. Comp offers a full selection
of both solid and roller 4 & 7 swap cams to racers looking for an edge on the competition.
Valve Advertised Duration Lift With
Setting Duration @.050" 1.5 Rockers Lobe Recommended Components
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
Lifters have lightweight check valves to eliminate excessive oiling Engineered for high end racing applications, lifters have precise
at high RPM. Sold in sets of 16. tolerances for superior camshaft compatibility and high RPM
Part No. Description durability. Sold in sets of 16.
COM812-16 Chevrolet, All V-8 Part No. Description
COM832-16 SB Ford 289-351W COM2900-16 Chevrolet, All V-8
COM846-8 Ford 2300cc 4-Cyl. COM2910-16 SB Ford 302-351W, 1969-Up
PRO MAGNUM HYDRAULIC LIFTERS SPORTSMAN
Lifters perform well at higher RPM and have a distinct advantage SOLID ROLLER LIFTERS
when using hydraulic tappets. Sold in sets of 16. Lightweight, premium Sportsman Solid Roller Lifters
Part No. Description use two pressurized EDM oil feeds to the axle
COM858-16 Chevrolet, All V-8 and a single edge orifice feed to the wheel
COM862-16* SB Ford 289-351W for improved oiling and reliability.
* Lifters require an adjustable valve train. Manufactured from quality 8620 steel
for maximum durability and resistance
CHEVY RACE HYDRAULIC LIFTERS to wear, lifters are internally machined for reduced weight. Tall
COM84000-16 body design allows usage in standard or .300" tall lifter bores. Choose from
traditional needle bearing axle/wheel design or bronze bushing axle/wheel
Lifters have tighter tolerances, one-piece pushrod seats configuration. Sold in sets of 16.
and extra heavy duty snap rings. Fits all Chevy V-8's. Pushrod Needle Bearing Bushing
Sold in sets of 16. Application Dia. Seat Location Part No. Part No.
Small Block
Chevy .842" All Centered COM96818-16 COM96818B-16
(4) Pairs:
SOLID LIFTERS Small Block .842" Centered & .160" Left COM96894-16 COM96894B-16
The lifter crown has been ground to a precise radius and the oil Chevy (4) Pairs:
metering band milled to eliminate excessive oil being pumped Small Block Centered & .160" Right
to the top of the engine. Sold in sets of 16. .875" All Centered COM96838-16 COM96838B-16
Ford
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

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