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what is better?

This is a discussion on what is better? within the Internal Engine forums, part of the LSx Technical Help Section category; 1.8 rockers or cam and stock rockers. Alot of the aftermarket cams say they don't reccomend the 1.8 rockers, but ...

  1. #1
    Junior Member
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    White
    1998 Camaro SS

    what is better?

    1.8 rockers or cam and stock rockers.

    Alot of the aftermarket cams say they don't reccomend the 1.8 rockers, but when people like SLP sell a performance pac they sell the 1.8 rockers and no cam. How mush hp will just the 1.8 rockers provide over stock?

  2. #2
    member since may 2000 nhraformula's Avatar
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    black
    2000 nhra edition formula

    i gained 9 rwhp with the rockers.
    i sold the rockers and added a cam, a 39 h.p bump that you can feel all the way threw the power band.
    my vote is for the cam.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  3. #3
    Senior Member Redphoenix1998's Avatar
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    Red
    1998 Pontiac Trans Am

    I have a cam that requires 1.7 and they sent me 1.8's on accident and let me tell you, it threw my valve geometry off and I ended up with a bent valve because some cams have a fast ramp rate and with 1.8's, you can actually float the valves open. Research your cam and valvetrain parts and find the best setup for your application. Most custom grinds from Thunder Racing I will let you know right now require 1.7's.

  4. #4
    BlackHawk T/A
    Guest
    The rocker ratio multiplies the lift of the cam...meaning if you have a high lift cam already (rated at 1.7) it can go way too high with a 1.8 ratio and the valve will actually hit the piston.

    Say its a .585" lift, that number is figured with a 1.7 rocker ratio. To figure out what it would be with 1.8 you would take .585 / 1.7, then take the answer x1.8. You get about .620".

  5. #5
    Junior Member MNR-0's Avatar
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    BLACK
    2004 Monaro

    I would go with a properly specified cam before rockers. Rockers can alter the valvetrain geometry and cause more problems than they are worth. The stock rockers are pretty good.

  6. #6
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    I like my stock rockers....
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

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