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$163.95
COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM
COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM

COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM

Chevy Small Block V8, Hydraulic Flat Tappet Camshaft Type, 1800-5800 RPM Range, Steel

2 Reviews | 1 Answered Question
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COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM
COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM
COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM
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COMP Cams 12-268-4 S/B Chevy Vacuum Rule Hydraulic Cam, 1800-5800 RPM
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Part # 282122684
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Details

Camshaft Type:
Hydraulic Flat Tappet
RPM Range:
1800-5800
Intake Duration:
268
Exhaust Duration:
280
Intake Duration (.050" Lift):
224
Exhaust Duration (.050" Lift):
230
Intake Valve Lift w/ Rocker Arm Ratio:
0.479"
Exhaust Valve Lift w/ Rocker Arm Ratio:
0.480"
Lobe Separation:
114 °
Material Type:
Steel
Grind Number:
CS XE268H-14
MFG. Part #:
12-268-4
GTIN Code:
036584063292
Valve Springs Required:
Yes
Sold in Quantity:
Each

Info

There are many things that effect vacuum. Camshaft lobe separation, lifter style, intake manifold, piston rings, compression ratio and overall valve and engine condition. Due to many and varied engine combinations, Speedway Motors offers no warranty on camshaft and or lifters for either performance, vacuum or longevity.

Must be used with break-in oil additive (sold separately).

Item Details

For use with Rhoads Hydraulic Lifters

Charts

Vacuum Rule Cam Chart (GIF)

282-122684 Specs (PDF)

Important Messages

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
Some parts are not legal for use in California or other states with similar laws/regulations

Reviews

Q & A

Videos & Articles
  • What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.
  • Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!
  • Picking the right camshaft can be a challenge. Use our camshaft selection guide to learn how to select the right cam for your street rod's best performance.

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