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Old 07-22-2006, 01:36 PM
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Cam lift and duration?

Hello.

When dealing with larger blocks (Pontiac 400, Chevy 454 type deals), in general, what is a good lift and duration for an everyday street car? I was thinking .454 but know clue for duration. No clue at all, really.

Also, will the ideal figures differ substantually from block to block?

Thanks alot.

Jesus, sorry. Totally wrong place.

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Old 07-23-2006, 12:55 PM
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welcome to the site

In your case I would recommend calling a brand name cam company and using their recommendation for your specific combination of engine parts and vehicle.

Generally 210-220* max. @ .050 with a wider lobe separation angle like 114*.

Lift is proportionate to duration and cam type, and usually limited by valve guide height and valve spring compressability at about .460 lilft with stock heads.


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