Cam selection for a 350 w/ 601 heads

Discussion in 'High Performance Modifications' started by ORANGE77, Feb 10, 2007.

  1. ORANGE77

    ORANGE77 Veteran Member

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    Jan 17, 2002
    TRAFFORD, PA.
    I have a chance, when I'm ready to buy a set of 601's that had the intakes enlarged to take 1.94 valves. The exhaust stays at 1.5. They were enlarged using a bowl hog and the comb. chambers are at 55cc. This will be on my LM-1 350 w/ its stock pistons, no block decking. Most likely using a .028 GM gasket. Not sure on the rockers and push rods yet. I was thinking of a good non-roller timing chain. Motor has under 36K. I have full length 1 5/8" headers and will be using a 2 1/2" exhaust with X-Pipe. Trans. is a TH-350, stock converter and 342.1 gears. What would be a nice street performance cam combo to match the compression I would be looking at. Upping on the convertor stall would be considered also. :bowtie:
     
  2. rustbucket79

    rustbucket79 Veteran Member

    While I personally hate installing 305 heads on a 350, the Comp extreme energy 262H hydraulic cam or equivalent from other manufacturers will work well for you, and even better with a 2500 stall. Do yourself a favor and put a nice radius on the combustion chamber edges that fall inside the head gasket to reduce the chance of detonation.
     
  3. pdq67

    pdq67 BANNED

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    Jul 26, 2001
    Columbia, MO, USA
    Ditto!!

    "Do yourself a favor and put a nice radius on the combustion chamber edges that fall inside the head gasket to reduce the chance of detonation."

    pdq67
     
  4. CWT Racin'

    CWT Racin' Veteran Member

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    May 15, 2006
    IND
    maybe run the hyd 327/350 hp camsahft.
     
  5. ORANGE77

    ORANGE77 Veteran Member

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    Jan 17, 2002
    TRAFFORD, PA.
    To rustbucket and/or pdq67. Are you talking about putting a chaffer or rounding off the edge. how would this be done. Where am I going wrong to risk detonation problems. I was thinking the chamber design would be less likely to do this vs a 416 or other 'D' chamber heads. Would a vortec design be my best bet.:)
     
  6. pdq67

    pdq67 BANNED

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    Jul 26, 2001
    Columbia, MO, USA
    You just put an about 1/16" to an 1/8" quarter-round "bullnose" around the sharp edge of the as-cast chamber outline is all to help open it up some as well as to remove any sharp edges that can become hot spots..

    It's easy to do, but will take a bit of time.

    pdq67
     
  7. rustbucket79

    rustbucket79 Veteran Member

    The vortec heads would be your best bet, but yes a nice rounded edge is your best bet.

    GM cams, although functional and long lasting, tend to be somewhat lazy on the bottom end of the torque scale, and the 327/350HP grind is too large. (222°@.050)
     
  8. CWT Racin'

    CWT Racin' Veteran Member

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    May 15, 2006
    IND
    Rusty, I ran that combo awhile ago, My father put the cam in my motor, and I ran it for years, it pull to 5600 rpms and run mid 13's with 3.23 gear. For being 16 at the time I thought ran pretty good for street, but I agree vortecs are a better choice over any 305 head, just really don't like the idea of coughing up more money for a intake and the centerbolt V/C.
     
  9. ORANGE77

    ORANGE77 Veteran Member

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    Jan 17, 2002
    TRAFFORD, PA.
    What do I need tool wise to do this. I could get who I could be buying these from to do this too. Have not ruled out Dart I.E. 180's or Vortecs yet. Just looking at cost. These heads are 375/pair plus shipping. I have a edelbrock eps intake with a squarebore base and a performer square/spread base on the motor now. I was thinking of a cam w/ say 214 on the intake and 224 on the exhaust range. :)
     
  10. rustbucket79

    rustbucket79 Veteran Member

    Since you already have an intake for the old style heads you should consider the Dart heads. There are a dozen manufacturers out there that make the cam you're thinking of, find the best deal and buy it. 214/224, .443/.465, 112 L/S.
     

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