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How much Lift before clearance problems?

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Author	Topic: How much Lift before clearance problems?
66 Racer Journeyman Posts: 63 From: West Covina, California Registered: Aug 2001	posted 11-03-2002 02:43 PM Hey guys, Im building a 302 and i wanted to know how big of a cam would fit before i have clearance problems. I have been told around .500 is getting boarder line. I have silvo-lite flat top pistons with 66 289 small chamber heads. stock valve sizes. I wanted to put in a comp cams magnum series 270 (.502/.502?) or 280 (.512/.512?) series cam, i think those are the correct lift ratings within .001+/-. And if i could get away with it, which i dont think so i was looking at an extreme energy cam with more lift with simular duration. You guys would help me out a lot with some good info. Thanks --Anthony ------------------ Under Construction 66 Coupe 289 V8 - 600cfm Holley - Tri-Y Headers - Flowmaster 2.5 dual exaust - Centerforce Dual Friction IP: Logged
Moneymaker Administrator Posts: 19751 From: Lyons, IL, USA Registered: May 99	posted 11-03-2002 02:45 PM It depends a lot on the duration also Tony, but most SBF flat tops can stand up to .550 lift. ------------------ Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver MCA member# 53321 NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Professional Manwhore The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked." Quote #2: "Make sure brain is in gear before engaging mouth!" Quote #3: "If you can't run with the big dogs, stay on the porch!" IP: Logged
66 Racer Journeyman Posts: 63 From: West Covina, California Registered: Aug 2001	posted 11-03-2002 03:08 PM the duration on the 270 is about 224 @ 50 with .502/502 and the 280 is 230 @ 50 with 512/512. With these duration specs I should be safe then? Thanks for the info ------------------ Under Construction 66 Coupe 289 V8 - 600cfm Holley - Tri-Y Headers - Flowmaster 2.5 dual exaust - Centerforce Dual Friction IP: Logged

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