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  • valve train

    ok getting a new cam and so im getting rocker arms, new spring, pushrods, lifters, and valves. i want to upgrade everything from stock. im gonig to get a gt2 cam and i want to run 1.8 rockers. And was wondering if i have to get longer push rods or i could just use the stock length? if so how much longer and will 1.8 rocker be fine in stock heads?
    thank you
    whisper air lid, ftra, kenny brown sfc, k+n air filter,smooth bellows, borla 3\" cat back ,random tech high flow cat,bfg t/a kds 275/40front 315/35rear

  • #2
    Do you know how to calculate how much lift you would be running there? If not, you probably need to do more studying before thinking about going this route.

    GT2 cam = .3168" lobe lift
    At 1.8, that's .570". Way too much for stock heads.


    Changing rocker ratios isn't gonna effect pushrod length needed.
    Matt
    1998 Mystic Teal Camaro M5
    Whisper Lid, Pacesetter Headers, Catco Cat, Dynomax Super Turbo, B&M Shifter, BMR STB, LSD, P&P Intakes, GT2 Cam, Comp OE Lifters, 1.7 Roller Rockers, Pushrods, SSM Heads, DHP PowrTuner.

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    • #3
      yeha i really dont nkow that much about this part could you tell me a good site to go to read about it ?
      thank oyu
      whisper air lid, ftra, kenny brown sfc, k+n air filter,smooth bellows, borla 3\" cat back ,random tech high flow cat,bfg t/a kds 275/40front 315/35rear

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      • #4
        Originally posted by zero:
        yeha i really dont nkow that much about this part could you tell me a good site to go to read about it ?
        thank oyu
        Here. Just do a search, you will find the info you need.
        1995 Pontiac Firebird
        2008 Chevrolet Silverado LT Crew Cab 4x4

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        • #5
          well i did some reading and i think wiht new valve seals and new retainers it would give me .05 of extra clearence. so that should give me the extra space i need to run stock heads....right
          whisper air lid, ftra, kenny brown sfc, k+n air filter,smooth bellows, borla 3\" cat back ,random tech high flow cat,bfg t/a kds 275/40front 315/35rear

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          • #6
            Hey Matt, the stock lifters are hydraulic right?
            Sorry about the kind of off topic question.
            1999 Firebird

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            • #7
              Forget about the 1.8 rockers and just run your stock ones with some stronger valvesprings/matching retainers and possible stronger pushrods. I dont think you would see much gain with 1.8 rocker, just added stress to the valvetrain.

              [ December 15, 2005, 02:14 PM: Message edited by: RedFrk13 ]
              92 S10 3800 A4(96)<br />1/4: 14.374 @ 92.25 w/ 1.976 60\'<br />Turbo and 12\'s Coming Soon!

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              • #8
                k then thast what i will do thank you
                whisper air lid, ftra, kenny brown sfc, k+n air filter,smooth bellows, borla 3\" cat back ,random tech high flow cat,bfg t/a kds 275/40front 315/35rear

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                • #9
                  Just don't buy the Comp locks....

                  I went with z06 springs, titainium retainers, and comp pushrods with the GT2 cam in mine.
                  -1999 Camaro Coupe 3800 Series II V6 A4 - SOLD<br />-1998 Pontiac Grand Prix GTP coupe

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                  • #10
                    Originally posted by RedFrk13:
                    Forget about the 1.8 rockers and just run your stock ones with some stronger valvesprings/matching retainers and possible stronger pushrods. I dont think you would see much gain with 1.8 rocker, just added stress to the valvetrain.
                    He will see a gain. I'm thinking about doing it now that I have heads.


                    With 1.6 he will have .507 and with 1.8's he will have .568 lift. His stock heads wont like that but it would be a good mod after he has head work done.
                    2001 V6 Camaro - VTEC Badged, Abbott Racing Heads Sticker, and Loud A$$ Exhaust<br /><br /><b>BUILT NOT BOUGHT</b><br /><br />14.0 @ 96.44 MPH (Street Tires, Before Tranny)<br /><br /> <a href=\"http://members.cardomain.com/6pakcamaro54\" target=\"_blank\">http://members.cardomain.com/6pakcamaro54</a>

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                    • #11
                      Originally posted by SilverBirdSeven:
                      Hey Matt, the stock lifters are hydraulic right?
                      Sorry about the kind of off topic question.
                      Yes, hydralic roller lifters.


                      To calculate cam lift for those who don't know

                      .507 is the lift with the rocker ratio added in. Divide by rocker ratio .507/1.6 = .3168

                      Take that number and multiply by rocker ratio to find new lift. I didnt read replies, but like matt said your stock heads wont like that much lift at all. You'll have to get valve guides cut to handle that lift.
                      2001 V6 Camaro - VTEC Badged, Abbott Racing Heads Sticker, and Loud A$$ Exhaust<br /><br /><b>BUILT NOT BOUGHT</b><br /><br />14.0 @ 96.44 MPH (Street Tires, Before Tranny)<br /><br /> <a href=\"http://members.cardomain.com/6pakcamaro54\" target=\"_blank\">http://members.cardomain.com/6pakcamaro54</a>

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