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Roller Rocker Ratio

This is a discussion on Roller Rocker Ratio within the Internal Engine forums, part of the LSx Technical Help Section category; I am getting ready to install a LS6 kit on my 2000 Trans Am, LS1, WS6. I bought the stock ...

  1. #1
    JMAC Racing WS6ICK's Avatar
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    2000 Trans Am WS6 LS6
    2006 GTO LS2

    Roller Rocker Ratio

    I am getting ready to install a LS6 kit on my 2000 Trans Am, LS1, WS6. I bought the stock GM heads and cam. My question is Summit sells a Harland Sharp roller rocker for LS1/LS6 and their ad says its a direct bolt on and will fit under stock valve covers for both engines. The stock ratio is 1.7:1 but I want to get the 1.8:1 ratio roller rockers. Will I have to worry about valve to piston clearance with the 1.8:1 ratio rockers? Do I need to change valve springs?
    Thanks
    Last edited by WS6ICK; 09-15-2006 at 04:47 PM.

  2. #2
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    Ruby Red
    98 Camaro Z28 402 stroker

    no you should be just fine

  3. #3
    Member Sunset T/A's Avatar
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    Sunset Orange
    2002 TransAm

    Talk to their technical service people and see what they say. Especially about pushrod length. They can help you.

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    Ruby Red
    98 Camaro Z28 402 stroker

    I would change the springs though

  5. #5
    JMAC Racing WS6ICK's Avatar
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    2000 Trans Am WS6 LS6
    2006 GTO LS2

    If I decide to go with a bigger cam, what size should I get that will work with the stock LS6 heads, Pushrods and Lifters? The car has an A4. This car is not a daily driver but I do take it to the track on Friday nights and I would like to drive it on the HWY if I need to.

  6. #6
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    Ruby Red
    98 Camaro Z28 402 stroker

    If you go with a big cam I would go with stock size rockers, pushrods, and get a prc dual spring kit.

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