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  • #31
    In that case then the cam is right, the dot was pointing up.. I had to let the car idle high just so that it would run at all. The timing is set correctly so I think that I am good.
    00 Grand Prix GTP Daytona

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    • #32
      the dot on the cam was pointing 12 oclock??!! the dot on the cam gear should be 6 oclock and the crank gear should be 12 oclock
      '86 Grand National

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      • #33
        Originally posted by 34blazer View Post
        the dot on the cam was pointing 12 oclock??!! the dot on the cam gear should be 6 oclock and the crank gear should be 12 oclock

        Doesn't matter. Since the crank rotates twice as many times as the cam, you have more than one position the gears can be in relation to each other and still be on time.
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        • #34
          Originally posted by ForcedFirebird View Post
          Doesn't matter. Since the crank rotates twice as many times as the cam, you have more than one position the gears can be in relation to each other and still be on time.
          to me it does, how do you know if the cam timing is dead on if your not dot to dot. other than degreeing it in
          '86 Grand National

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          • #35
            he means that it is prob on, just out of rotation...if you turn the crank one more time it should be spot on then...remember cam turns 1/2 crank speed

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            • #36
              Originally posted by 34blazer View Post
              to me it does, how do you know if the cam timing is dead on if your not dot to dot. other than degreeing it in
              Both marks up, both marks down or both marks facing each other makes no difference. In any case if you are a tooth off you will be able to spot it by eye quite easily in any scenario. Being 1 tooth out is quite a difference. If you ever want to check then all you need to do it get out your ruler and lay it over the gears. When the centers of the dots both land on the ruler edge and you are also liked up to the center of the cam and crank shafts then you have installed your cam correctly.
              1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
              1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
              Because... I am, CANADIAN

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              • #37
                back to the lash....

                the magical way to set it....

                start engine, remove valve cover, use scrap metal to collect flying oil and direct it back into the head, loosen each rocker arm nut slowly till it ticks, then tighten it slowly till it stops. move on to the next rocker arm nut...repeat. once youre done, set the valve covers on (but dont bolt them on) and give it a lil rev while listening for anyticking from a rocker arm. if you hear any, give them a little more of a turn.

                this is a sure fire way to nail valve lash. for V8s they actually sell oil deflectors that make this possible with out all the flying oil.

                this method is a lil messy, a lil warm and works everytime.
                3500, 1280 cam and PR, ls6 valve springs, port and polished heads, ported lim, ported uim, 4.3 70mm tb, ported trueleo headers and y pipe ALL FOR SALE (minus the car)
                96 LT4 6spd corvette. 355, AI 215cc LT4 Comp CNC Heads, Prope SRS pistons, Ported intake, ARH long tubes, Corsa Indy Pace 4:10 gears
                2012 Chevy Sonic Turbo 6spd
                1970 M35A2 Deuce and a Half, Spin on filters, Turned up IP, HIDs, Flat Black, 11.00x20 singles.

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                • #38
                  I have heard of that method. A good way I read to do it is to get some old junker valve covers and cut the center out to deflect alot of the oil. Remember I have an old ironhead so I have to remove the intakes to pull the valve covers which makes it a little bit of a pain.
                  00 Grand Prix GTP Daytona

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                  • #39
                    Originally posted by merlot566jka View Post
                    back to the lash....
                    start engine, remove valve cover, use scrap metal to collect flying oil and direct it back into the head, loosen each rocker arm nut slowly till it ticks, then tighten it slowly till it stops. move on to the next rocker arm nut...repeat. once youre done, set the valve covers on (but dont bolt them on) and give it a lil rev while listening for anyticking from a rocker arm. if you hear any, give them a little more of a turn.
                    once you don't hear ticking, turn an additional 1/2 to 1 full turn. if you tighten the rocker nut until you don't hear ticking, you'll hear ticking later as parts wear. CompCams told me 1.5 turns. with the SAE threads on the rocker stud instead of metric, 1.5 sounded a little too much. i ended up with 1 turn on the rocker nut.
                    Andy

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                    fastest 1/8: 10.19@ 67.17
                    fastest 1/4: 16.16@ 82.70

                    62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.

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                    • #40
                      instructions for comp lifters are .040" preload, which depending on the thread pitch can be any number of turns.

                      i would verify this with a dial guage or measure the thread pitch. i went 1.5 turns when i first saw that information and something didnt feel right about the motor so i went back and checked. sure enough it was about .120"

                      my .02$
                      got zap-straps?
                      89 Z24
                      13.886 @ 96.16 mph
                      street trim - slicks

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                      • #41
                        That is exactly what happened to me. I have read 1.5 turns before so I went that far. I now went 1 turn.
                        00 Grand Prix GTP Daytona

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