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Cam specs

Discussion in 'The Garage' started by mountainexplorer, Nov 20, 2002.

  1. mountainexplorer

    mountainexplorer 1/2 ton status

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    How would you evaluate these cam specs (in a 454)

    --------------------Intake-----Exhaust
    .050 Dur.------------254---------254
    SAE Dur.-------------295---------295
    Cam Lift------------.323--------.323
    Valve lift----------.485--------.485
    Lobe ctrs.-----------110---------118
    Lash----------------.030--------.030
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> Pretty mild in a 454. </font color>
     
  3. ben427

    ben427 1/2 ton status

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    kinda high on the duration side for wheeling, and surprisingly low on the valve lift side IMHO. It seems like a fairly low power high rev cam.
     
  4. mountainexplorer

    mountainexplorer 1/2 ton status

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    It's the cam in my 454 in my Suburban. I just use it for towing and hauling people around, nothing too serious off-road. Some guy spent $4500 to have this motor built in a '76 Suburban. I have all the receipts. I know its not worth that...I bought the whole '76 Suburban and dropped the motor in my '81 Suburban.

    Figured I'd just see what others thought about the specs on it (I knew it wasnt radical or anything).

    Anyone have any suggestions on what sort of cam to run in a 468? I have a .060 over 454 block, flat tops, closed chamber heads, and it will be going in a Crew Cab with 44" tires. I'm no expert...just kinda weighing some options and getting suggestions.
     
  5. ben427

    ben427 1/2 ton status

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    Id try to keep the duration below 230 @.050 lift GMPP has a nice one im looking at for my truck when it goes big block, pN 1235922
    Duration at .050-- 218 228
    valve lift------------.500 .500
    lobe centerline-------- 114
    surprisingly gmpps cam kits are fairly competitivly priced.
     
  6. TWISTEDJACK

    TWISTEDJACK 1/2 ton status GMOTM Winner

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    I am a big fan of the Comp Cams 4x4 extreme series cams. They make big power in the low rpms. /forums/images/graemlins/thumb.gif
     
  7. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Personally, I've had great luck with this Crane camshaft.

    Crane Cams Energizer Hydraulic Cam #103072
    .533 intake lift .533 exhaust lift
    226° Intake 226° Exhaust @.050 checking
    108° lobe centers

    Lots of torque!! /forums/images/graemlins/thumb.gif
     
  8. Z3PR

    Z3PR Banned

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    I have a friend that bought a Crane Cams reproduction 300 HP cam for his 327 he had in a 74 Nova. One of the lobes was off by so meny degrees and coused a valve to put a hole in a piston. Crane admitted they fawked up, and was willing to replace the cam, but refuced to pay for any damage thier mistake coused. I refuce to use Crane Cams becouse of that. I've had good luck with Comp Cams.
     
  9. Blazer79

    Blazer79 1/2 ton status

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    The dream cam for my 454 would be something like:

    206-210 deg @0.50
    Somewhere around 0.5" lift

    Plenty of low end torque, according to Desktop Dyno.
     
  10. reddog64

    reddog64 1/2 ton status

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    Comp Cam's 4x4 cams....

    Most Machine shop builders I have met swear to the m for off-road use!
     
  11. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    This is what i run in my camaro:

    454 block + .070" overbore = 469 cu. in. Big Block Chevy Forged Crank, Rods, JE Pistons, 11:1 compression, Edelbrock aluminum rectangular port heads, 2.19"/1.88" valves, 315cc/ 110cc ports,
    Isky hyd. roller cam,
    Advertised Duration 284/294
    Duration @.050=238/248,
    cam lift =.340/.358,
    valve lift w/ 1.7 rockers =.578/.608,
    Lobe sep.= 110 deg.,
    Dart Single plane manifold, Holley 920cfm carb, Hooker super comp 2 1/8" primarys, 2-1/2" w/ H pipe, to 2 chamber flowmasters. TH-400 tranny, manual valve body, 3,000 stall converter. Ford 9" 4:11 posi, ladder bar rear suspension, subframe connectors, driveshaft loop...etc...
    This cam is LOPEY and rumbles! This cam (and the rectangular port heads) are for top end power like 3,000-7,000 rpms, a bracket race cam, not a 4X4 cam. You'd want to run a stall converter with something like this.
    It baseline chassis dyno'd 415RWHP @ 7,000rpms and 425RWFT/LBS. TQ @ 3,500rpms

    Sounds like that cam of yours is high on the duration and low on lift #'s like someone else mentioned. Less duration would be the way to go with a 4X4 cam.
    You'd want to degree in your cam also! The cam in my camaro we had to use 4* offset bushings to get the figures to match the cam card specs. So if you were to install the cam straight up without degreeing it, it would have really been 4* advanced.
     
  12. fortcollinsram

    fortcollinsram 1/2 ton status

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    The cam I bought for my TBI 454 is the GMPP Truck Torque cam #12361314...It has 202/210 duration on the I/E valves respectively at .050". Valve lift is .468"/.485"...this is a very low duration cam...in Chevy High Performance, they built a mild 454 with a similar cam (a little more lift I think) that made just shy of 500 lb/ft at like 2300 rpm...That is what I am going for...Low End torque

    Chris
     
  13. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Hey Ryan, I like that engine! The one in my truck is very similar, trust me...put it in the Blazer you'll love it!! /forums/images/graemlins/thumb.gif
     
  14. mountainexplorer

    mountainexplorer 1/2 ton status

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    Based on the little info I have on another cam (292 duration, .519 lift), can anyone tell how this 454 should sound at idle? I just got a Blazer with a 454 in it, and this is the only info I have on the cam.
     
  15. Donovan

    Donovan 1/2 ton status

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    I think everybody missed this cam is a Solid cam and not a hydrualic because the lash is .030". It probably will not get that good of gas mileage. I would pick a cam that is under 270 advertised duration and around a 112-114 lobe center. Most people will try to put to big of a cam in and you will not be happy. Stay on the smaller side.
     

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