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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     Click Here to See the Profile for 66 Racer   Click Here to Email 66 Racer     Edit/Delete Message   Reply w/Quote
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

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Under Construction 66 Coupe

289 V8 - 600cfm Holley - Tri-Y Headers - Flowmaster 2.5 dual exaust - Centerforce Dual Friction

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Moneymaker
Administrator

Posts: 19751
From: Lyons, IL, USA
Registered: May 99

posted 11-03-2002 02:45 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
It depends a lot on the duration also Tony, but most SBF flat tops can stand up to .550 lift.

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Alex Denysenko
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66 Racer
Journeyman

Posts: 63
From: West Covina, California
Registered: Aug 2001

posted 11-03-2002 03:08 PM     Click Here to See the Profile for 66 Racer   Click Here to Email 66 Racer     Edit/Delete Message   Reply w/Quote
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

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Under Construction 66 Coupe

289 V8 - 600cfm Holley - Tri-Y Headers - Flowmaster 2.5 dual exaust - Centerforce Dual Friction

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