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383..which cam??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by wheelin247, Jul 12, 2001.

  1. wheelin247

    wheelin247 1/2 ton status

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    im gettin a 383 but im kinda wondering what cam i should have put in it ,i was thinkin of gettin the comp 4x4 extreme cam in it ...does anybody know a good high torgue cam with a nasty lop too it ?
     
  2. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    Had OK luck with a comp 270S magnum in mine, but a little too lumpy for crawling. It might have worked with the injection, maybe not too well, so I went with a 256 hydraulic roller. that was pretty snappy, but too low for the rest of the motor. I'd advise building the whole thing around a 260-268 size cam. Maybe a marine cam, that's what I have in the 468ci. now. talk to the cam guys, but that's what I would do.

    Making the world better, one truck at a time.
    [image][/image]
    SW-ORD
     
  3. COXER222000

    COXER222000 Registered Member

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    I actually just had a extreme 4x4 comp cam installed in a 383 for my blazer and it works awsome it has great hp and amazing torque these cams are great for wheeling and I highly recommend one. I would go with a 262 grind for a 383 for I went with a 254 and I wished that I went one step higher!
     
  4. CaptCrunch

    CaptCrunch 1/2 ton status

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    I like the opinions so far. I think 270 is too much for a torque application. I think the 260 might be a bit light depending on what rpm ranges you want, what gears you have etc. It really depends on the combo though... I think the 383's have enough torque and I would probably get something like a 264 grind w/ 111 deg overlap or something in that neck of the woods.. that way you would have a little bit more top end and wouldn't quite be so torquey down low. The more torque you have may be the better, but the more torque and power you have down low the more likely you are to break stuff too. A 264 grind in any brand or compcams line would be pretty decent and let you get decent power up to 5 grand and start iit's power at about 1000 or 1500 rpm. I have also personally used the 260 w. good results in 350's... so I think a touch more for the 383 should work out nicely.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     
  5. Andreas

    Andreas 1/2 ton status

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    Agreed with the above. The Xtreme 4x4 262 will do the job, you can use your stock converter and you always have the option to go with 1.6 rockerarms to open it up a little bit more. Personally I wanted more midrange in my 406 so I went with Xtreme Energy 274. According to Desktop Dyno I should have over 400 ft.lbs from 2000 all the way to 5000 with a peak of 456 ft.lbs @ 4000rpm.

    Andreas

    406cui of pure sh*t[​IMG]
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I have a Comp Xtreme 4x4 250/258. It's 206/214 .432/.453. It's in an otherwise stock motor with stock valvetrain and it's fine. If you want torque, this is the cam to get. For a 383, I'd go 1 or two steps bigger on the cam.

    "High Torque Cam with a nasty lope to it"

    Impossible buddy. If you want torque, get a cam for torque. If you want a rough idle, get one for that. But be advised, your rough idle is going to cost you a lot of perforamance.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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