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Question: Will Rocker Ratio Increase Fit

This is a discussion on Question: Will Rocker Ratio Increase Fit within the Internal Engine forums, part of the LSx Technical Help Section category; This question relates to a '99 C5 Corvette / LS1 I'm putting a set of ported AFR heads with comp ...

  1. #1
    sgurski
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    Question: Will Rocker Ratio Increase Fit

    This question relates to a '99 C5 Corvette / LS1

    I'm putting a set of ported AFR heads with comp 918 springs. At this time i'm not going to do a cam. I'd like to increase the rocker arm ratio from 1.6 to 1.7 (or 1.8 if it will fit). But that's the question will a 1.7 fit without interference?

    thanks.

    SG>

  2. #2
    Ripa
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    Isn't the stock LS1 rocker ratio 1.7 ?

  3. #3
    sgurski
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    Your right, the LS1 has a 1.7 RR. What about a 1.8 RR.

    SG>

  4. #4
    member since may 2000 nhraformula's Avatar
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    my 1.85 cleared the valve covers.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    2000 TransAm WS6

    I would stay with stock 1.7:1 and get a bigger cam
    SLP 1.85 $450
    New Cam around $400 and more power than just bigger rocker arms
    lift is not what adds all the power duration, lift, LSA, ICL, overlap, ramp rate....

    The big reason I so no to this is because when you do a cam in the future with the bigger Rockers and then a bigger cam with even more vavle lift you might have to take of the heads again to cut vavle reliefs

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by BerryWS6
    I would stay with stock 1.7:1 and get a bigger cam
    SLP 1.85 $450
    New Cam around $400 and more power than just bigger rocker arms
    lift is not what adds all the power duration, lift, LSA, ICL, overlap, ramp rate....

    The big reason I so no to this is because when you do a cam in the future with the bigger Rockers and then a bigger cam with even more vavle lift you might have to take of the heads again to cut vavle reliefs

    i ditched my rocker arms because i cammed my car. i didnt wanna have to fly cut or anything.
    the rocker arms gave me a 10 h.p bump.

  7. #7
    sgurski
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    Cool thanks guys.

  8. #8
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    2002 Camaro SS

    The answer to your question is that you can put higher ratio rockers on your car. I put Crane VHP 1.85 rockers on my 02 with absolutely no problems. Yes they are expensive compared to a cam and you probably need a different valve spring too. The Cranes are an interesting option if you do not want to change cams but you want increased lift. Go to the Crane web site and read about it for yourself.

  9. #9
    ericeg
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    yeah crane has some nice pieces check out the pics at www.automotivemachine.com they have some of cranes stuff and some other trick stuff

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