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Piston to Valve Clearance

This is a discussion on Piston to Valve Clearance within the Internal Engine forums, part of the LSx Technical Help Section category; Hey I was wondering if anyone knew how much lift you can get away with on the 5.3 truck motor ...

  1. #1
    Junior Member
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    grey
    02 GMC Sierra

    Piston to Valve Clearance

    Hey I was wondering if anyone knew how much lift you can get away with on the 5.3 truck motor with stock ratio rockers? I'm planning on using the Dart heads and comp springs good to .600 lift, but for the time being I'm going to use the stock heads with the comp springs. Any help would be great

  2. #2
    Senior Member ninobrn99's Avatar
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    Pewter
    all bore 370 Trans Am

    PtoV isnt measured by the lift of a cam, but rather the duration and lsa. You need to also have the gasket thickness and milling of the heads taken into consideration too.

  3. #3
    down in it 310stanger's Avatar
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    white
    90 Mustang 5.0

    lift has a factor in it, but your more in harms way with the duration and lsa for sure. the only real way to know is to clay that engine and check.

  4. #4
    Junior Member fordkiller's Avatar
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    Midnight Blue
    2002 Z28

    What would be too much Duration, LSA, and Lift to run with stock heads and rockers?

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