What do you think about this camshaft change.

Discussion in 'PSI Superchargers Tech Questions' started by gt_diesel, Jun 25, 2008.

  1. gt_diesel

    gt_diesel New Member

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    So, as you may know... I have been trouble shooting why my car is running slower than I think it should and have done a little research... I have talked to some camshaft guru's and here is what they have come up with.

    My motor of course is a 526" Rodeck, Dart 360's Flowed to 410, 14-71 at 38 pounds of boost, Methanol... etc.

    The car will end up weighing around 2750 with driver with my new block.

    It had run 7.60 @ 183 weighing 2900 pounds using my 2 speed glide.

    So I send out my camshaft info which is as follows.
    Lober Seperation - 116
    Exhaust Closes @ 22 Degrees
    Exhaust Opens @ 82 Degrees

    Intake Opens @ 35 Degrees
    Intake Closes @ 79 Degrees

    Center Line of Intake Lobe - 112 Degrees

    4 Degrees Advanced

    Lift at Intake Valve - .810
    Lift at Exhaust Valve - .770
    Rocker Arm Ratio - 1.7
    Valve Adjustment - .026

    Duration @ .050
    Intake - 294
    Exhaust - 284

    Advertised Duration
    Intake - 330
    Exhaust - 314





    They replied back saying that the camshaft in the car now is defineately wrong and appears to be like old school turbo stuff.

    They recomended the following.

    282° intake, 296° exhaust, .833" / .833" lift, 116° lobe sep.

    They said with the exhaust being 10degrees out on my current cam, it is causing a lot of power loss.

    What do you guys think? Any ideas on improvement?

    I would like to go in the bottom 7's

    My new block is gonna be dropping 150 pounds or so off the car which will also help.
     
    #1
  2. secondwindracing

    secondwindracing top alcohol

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  3. gt_diesel

    gt_diesel New Member

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    Yeah, your post got me thinking about it, and after some talk with differnt cam companies, you were right.

    I hope I can pick up enough to drop down to the bottom 7's
     
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  4. JRB

    JRB Guest

    Camshafts are an often overlooked area. I think changing your cam is a great idea. Good luck and let us know how it works out.
     
    #4
  5. Kenneth S

    Kenneth S Member

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    They are correct about that cam being for a turbo setup, a different cam should wake your car up.
     
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