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Nitrous HP 240/253 Hydraulic Flat Cam for Chevrolet Small Block

was $247.95 Special Price $235.55
In stock
  • For Hydraulic Flat Tappet Lifters; Fits '58-'021 262-400 cid Chevy Small Blocks2

  • Pro Street applications • Excellent for multi-stage nitrous or 671 blower • 2800+ stall

  • Xtreme Energy™ Cams are designed to maximize torque, acceleration and throttle response while providing excellent high RPM horsepower. A faster intake valve opening increases engine vacuum and enhances throttle response. Special intake closing ramps close the valve sooner, providing more cylinder pressure and torque without resulting in excessive valve train noise. Faster ramps achieve maximum velocity sooner, increasing the area under the lift curve and providing maximum horsepower. Smoother exhaust designs allow for a more effective purge of spent gasses from the combustion chamber to further increase horsepower.

  • For Carb or Tunable Fuel Injection3

1: Cams for '55-'57 engines can be custom ordered. Please Call, Email, Twitter or Live Chat for details.

2: The '87+ Chevy Small Block received provisions for roller lifters. Most '87 - '93 GM cars came with roller lifters, but most '87 - '95 trucks came with flat tappet lifters in roller lifter style blocks. If a roller cam is desired and your block has OEM-style roller cam provisions. COMP Hyd. Roller Lifter Install Kit for '87-'90 Blocks or '91-'02 Blocks can be purchased, as well as a '87+ OE-Style Hyd. Roller Cam and '87+ OE-Style Roller Lifters. Roller cam conversion in pre-'87 blocks requires Retro-Fit Hyd. Roller Cam and Retro-Fit Link Bar Lifters.

3: Many OEM EFI systems cannot be tuned to run well with certain cams. Before installing in an OEM EFI engine be sure to check with a competent tuner.

More Information
UPC 036584023869
Manufacturer COMP Cams®
Emissions Code
Engine Family Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
RPM Operating Range 2,800-6,800
Cam Type Hydraulic Flat Tappet
Camshaft Series Nitrous HP
Camshaft Gear Attachment 3-Bolt
Usage Street/Strip
California Proposition 65 WARNING: Cancer and Reproductive Harm
Advertised Intake Duration 284
Advertised Exhaust Duration 305
Intake Duration at .050 Inch Lift 240
Exhaust Duration at .050 Inch Lift 253
Intake Valve Lift 0.507
Exhaust Valve Lift 0.525
Lobe Lift Intake 0.338
Lobe Lift Exhaust 0.35
Lobe Separation 113
Intake Centerline 108
Valve Timing Lift 0.006
Exhaust Close ATDC 34
Intake Open BTDC 34
Exhaust Open BBDC 90
Intake Close ABDC 70
Lifter Style Hydraulic Flat Tappet