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Thread: cam size help...for 350

  1. #1
    Senior Member DYNO OPERATOR
    Join Date
    Jul 2003
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    Chelsea Oklahoma
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    cam size help...for 350

    we have a 89 chevy block.13.1 steel crank yada yada.the heads are 2.02 dbl hump with some porting.it will be running alcohol.930 carb.kooks headers 1 7/8 tube.single plane intake.i allready have a set of hyd roller lifters from comp cams.so i would like to go hyd roller again.or i can go a differant route.just looking for some input.

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
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    La.
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    2,890
    Hey Ray,

    I don't know how heavy of a vehicle you have, But both Jimmy Smith and i have had good luck with bullit cams and for the small cu.in. engines we run anywhere between .625 and .640 lift ground on 106 lobe ctrs. and installed at 102. In fact Jimmy runs a 355 flattop motor with hilborn stacks that runs 6.40's in a 2920lb with driver Camero. I run a 377" with a toilet bowl in my Malibu that weighs 3250lbs with driver and it will run 6.50's. now in my case the cam is too big .660 lift, and kills the torque a bit. I have a .624/.624X106 lobe ctrs. i'm sure would drop me about a tenth, but i'm getting ready to drop in my 434, so i don't want make the change.
    I don't know if they grind a hydraulic roller that big or not since i've never run them, also i don't know if the low spring pressure will allow you to run to 7200 RPM's that you need to run to make a small engine perform at it's best.

    Here is a cam listed by Ultadyne (owned by bullit) that will fit your application perfectly.

    http://cgi.ebay.com/ebaymotors/Chevy...=p4506.c0.m245


    JMO

    Zip.

  3. #3
    Senior Member DYNO OPERATOR
    Join Date
    Jul 2003
    Location
    Chelsea Oklahoma
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    thanks for the reply. i do have a compcam part # 08-470-8 its 314int 314exh dur @.050 252int and 252 exh and has .600 lift on int and .600 lift on exh lobe sep of 110 would this be a good choice .and its a hyd roller.and the car weighs 2500 total

  4. #4
    Senior Member RACING JUNKIE
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    La.
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    With that weight i think you can probably get away with the 110 lobe seperation. I would atleast try it since you already have it. If it's a little sluggish on the 60' times you can alway back it down a little maybe install it at 107/108 and it shouldn't hurt the top end that much.

    Zip.


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