Stock Motor Cam Suggestions?

Discussion in 'High Performance Modifications' started by motor60, Jul 1, 2011.

  1. motor60

    motor60 Member

    85
    0
    Feb 27, 2011
    So. Cal
    Have a stock 1970 SS 350 motor with HEI ignition and headers. Any cam suggestions for the stock motor? Looking for the lumpy sound; however, dont want it to mess with the vacuum ( dont wanna lose my brakes). Just quick performance for now until the cash flow speeds up for a new motor.
     
  2. DRIVESHAFT

    DRIVESHAFT New Member

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    Aug 3, 2005
    Any cam that gives you the lumpy sound will have an affect on vacuum.
    You can get a cam that will give you the sound and still allow enough vacuum for brakes, but your vacuum is probably going to drop by at least a third.
     
  3. 80-z28

    80-z28 Veteran Member

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    Apr 20, 2009
    New Orleans, La
    Comp XE268. Any bigger you will loose vacuum and need a bigger converter.
     
  4. Damon

    Damon Veteran Member

    12,875
    10
    Nov 16, 2000
    Philly area
    Yeah, the XE268 would be the BIGGEST cam you should consider. I would make a case for the much smaller XE250, which is still about 10* more duration than a "stock" cam and on a tighter LSA. Next step up is the XE256 which is about 15* bigger than stock. All of them have much more modern lobe design which means they will usually out-perform a stock cam pretty much everywhere as long as you don't over-do it.

    As was said above, forget lumpy cams. If you can hear the cam in an otherwise stock motor you've probably already gone too big.
     
  5. tom3

    tom3 Veteran Member

    10,485
    26
    Aug 1, 1999
    ohio
    Just for fun I'd suggest the old grind for a 350/350 small block. Nice idle and good street manners, decent on gas. Should be pretty durable with the low additive oils of today too.
     
  6. motor60

    motor60 Member

    85
    0
    Feb 27, 2011
    So. Cal
    Ok, so between those three choices, which would be best for my "stock" application? AND if I changed my converter, which stall would work best with those cams? OR which cam/converter combo is best for stock application?
     
  7. motor60

    motor60 Member

    85
    0
    Feb 27, 2011
    So. Cal
    Looked up the XE268 cam. What is the H-10 model?
     
  8. rustbucket79

    rustbucket79 Veteran Member

    The correct cam would be the XE250 if you change nothing (assuming typical 8:1 dished/smog head 350) and the Xe256 would be decent if you go with a 2500 stall. The 246 pure energy is a decent choice as well.

    All these cams will enhance your current engine, but likely won't have much if any "tone", but then what's better, a rough idle, or tire smoke? ;)
     
  9. motor60

    motor60 Member

    85
    0
    Feb 27, 2011
    So. Cal
    Thx guys, but of course, i'd rather have the TIRE SMOKE!!
     
  10. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

    12,283
    5
    Sep 19, 2009
    Guyton, GA
    The xe268 is a nice cam for a stock motor
     

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