Are these cams decent for my application?

Discussion in 'Engine Topic' started by 71cmro, Jan 6, 2011.

  1. 71cmro

    71cmro Veteran Member

    1,384
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    Dec 3, 2003
    Beavercreek, OH USA
    An engine builder friend is suggesting either of these two cams for my application.
    http://www.summitracing.com/parts/SUM-K1105/

    http://www.hdmaddog.com/Chevrolet-GMC/Camshafts-Lifters-Cam/SB-Chevy-327-350hp-Complete-p3678288.html

    Here is what I am dealing with.
    - Engine is a 1969 block 4 bolt main 350
    - Vortec cast iron heads with a max lift of .475. Stamping #12558062
    - Do not know what pistons I have. Never removed the heads but believe them to be flat top since everything else on the engine was vintage 1969 and my engine guy said dish pistons did not start showing up until the early 70's.
    - Block has been decked but not sure how much. Can no longer see any engine code stamping on the deck.
    - Will be running an edelbrock or similar up to 5000 rpm intake.
    - Highly tuned quadrajet.
    - Mallory slightly better than stock distributor.
    - Full length headers going to Flowmaster dual exhaust that dumps out the rear
    - 3.42:1 posi rear.
    - Stock converter. Don't want to change it out at this point. Maybe in the future

    Want to get as much as possible without changing anything else.

    Goal is good street manners but with a few balls.

    Thanks for the help guys!
     
  2. sweetsoul

    sweetsoul Veteran Member

    598
    0
    Jan 12, 2010
    Liberty sc
    i would go with the second one , if it was a daily street driver
     
  3. earnhardtgm3

    earnhardtgm3 Veteran Member Gold Member

    1,403
    4
    Dec 18, 2007
    Camaro Country,GA
    Ditto on the second cam choice
     
  4. Cardinal

    Cardinal Veteran Member Lifetime Gold Member

    8,166
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    Jun 22, 2003
    Endicott, NY
  5. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

    12,247
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    Sep 19, 2009
    Guyton, GA
    I woud use the 268h or the 270h and if you want to push it go with the 280h
     
  6. BigEd36

    BigEd36 Veteran Member

    141
    0
    Mar 14, 2010
    Auburn, IN
    Of the two you listed the 2nd cam would be my choice, it's the old 327/350HP cam, and is used in the GMPP 350/290HP engine. But neither of these cams would be my first choice for your application. My choice would be the cam that GMPP uses in the 350HO/330 HP and 350/350HP circle track crate engines or a copy of it. Pace Performance uses the same cam in their Pace Pac 350/300HP crate engine, which is the same base engine as the Universal 350 or the 350/290HP engine. It has better street manners and still makes more HP than the 327/350HP cam. Every cam company has a close copy of it. The Lunati Bare Bones #10001LK cam/lifter kit and the Speed Pro #1013R both have a few thousandths more lift and 2* more duration on the intake/exhaust, so I consider them the same cam. The Lunati cam/lifter kit is $99.95 at Summit Racing. Member Z28rod reports very positive results with this cam. The Speed Pro cam/lifter kit is $91.99 at Northern Auto Parts. Don't be put off by the rpm range given by Speed Pro, I don't know why but Speed Pro always seems to give a very low rpm range for their cams. These cams will put your max HP at 5000-5300 rpm, and pull strong to 6000 or more. GMPP gives the 350/350 circle track a recommended max rpm of 5500 but the guys that race them in the crate engined late models wind them over 6000 rpm for best performance.

    The Comp Cams High Energy 268 or the Magnum 270 mentioned above would also be good choices. The HE 268H isn't Comp Cams best selling cam for no reason! The Speed Pro 1169R has the same specs (just .004" more lift) and sells for just $108.99 for the cam/lifter kit at Northern Auto Parts
     
    Last edited: Jan 6, 2011
  7. z28rod

    z28rod Veteran Member

    4,473
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    Apr 30, 2009
    hopewell junction,ny
    I Have Used The Cam That Cardinal Spec'd. Its A Tq Monster, Id Use That One.
     
  8. 71cmro

    71cmro Veteran Member

    1,384
    0
    Dec 3, 2003
    Beavercreek, OH USA
    Would the comp cam 270 give me a little lope to the idle?
     
  9. 1981zapper

    1981zapper Veteran Member

    The second one you picked out is the L79 Spec, it will work for your application
     
  10. BigEd36

    BigEd36 Veteran Member

    141
    0
    Mar 14, 2010
    Auburn, IN
    Any of these cams we've recommended will give you a nice lope to the idle.
     

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