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Cam selection for 400

Discussion in 'The Garage' started by orangeGMC, Aug 3, 2005.

  1. orangeGMC

    orangeGMC 1/2 ton status

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    Does anybody have any recommendations on what cam I should run in my 400? I have found recommendations for 350s but is there anything different for the 400? I have also read about "small base circle", do I need to look for that? The truck never sees highway, just a little around town and trail. Spends alot of time in the mud. Are any manufacturers better than others?
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    400 make good tourqe so get a good tourqe cam. and thay dont spin as fast as smaller motors so get one in the rmp range you will be most of the time:wink1: i like comp xtreme 4x4 cams
     
  3. orangeGMC

    orangeGMC 1/2 ton status

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    I found 2 comp xtreme 4x4 cams. Which would be better for low end torque?
    The red one or the blue one?

    Description
    Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 254/ 262, Lift .447/ .462, Chevy, Small Block, Kit
    Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 250/ 258, Lift .432/ .453, Chevy, Small Block, Kit


    Advertised Duration
    254 int./262 exh.
    250 int./258 exh.

    Advertised Exhaust Duration
    262
    258

    Advertised Intake Duration
    254
    250

    Assembly Lubricant Included
    Yes
    Yes

    Basic Operating RPM Range
    1,000-5,200 RPM
    600-4,600 RPM
     
  4. sweetk30

    sweetk30 professional hooker Premium Member

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    where do you run most of the time in power range? and what rpm do you lanch at most of the time? this will help you make a good choice:wink1:
     
  5. orangeGMC

    orangeGMC 1/2 ton status

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    In my truck right now I have a 305, so I have to stay up higher in the RPMs to turn the tires. The 400 is still on the engine stand so I don't know the RPMs it will be running.
     
  6. sweetk30

    sweetk30 professional hooker Premium Member

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    ah hell get #2 cam . the 400 will kick that 305 big time. :D
     
  7. SUBFAN

    SUBFAN 1/2 ton status

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    I went with the 262 grind, going with 4.56 gears and ported the crap outta the heads....

    What is the rest of the combination?

    Maybe mine will be in and running this weekend so I can give you the results.

    A friend of mine runs the 254 grind in his 388, and it is wicked strong til about 4500 rpm's. Sounds great, lots of throttle response amd torque....
     

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