cam help
+ Reply to Thread
Results 1 to 12 of 12

Thread:
cam help

  1. #1
    Senior Member eliminator's Avatar
    Join Date
    Dec 2007
    Location
    Roanoke VA
    Posts
    854

    Default cam help

    I need advice, 454 60 over 8.25 compression 871 moonyham . does this cam sound ok , advertized duration @ .050 235/245 lift .555/580 lobe center 112' this is hyd for 2500- 6500 rpm doug herbert brand going in a ski hydro .
    Spider Monkey Racing
    FRIENDS DONT LET FRIENDS DRIVE EGGBEATERS

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Hondo Jet blown540's Avatar
    Join Date
    Feb 2008
    Location
    Holland, Mi
    Posts
    120

    Default

    Wow, I'm by no means a cam expert but that cam seems really conservative for your application Are you sure you wouldn't be happier with somthing in the 260-270 range with .700+++ lift? What are your heads set up for? What fuel? I vote for bigger

  4. #3
    Senior Member eliminator's Avatar
    Join Date
    Dec 2007
    Location
    Roanoke VA
    Posts
    854

    Default

    thats the problem , I dont know what I need, this is my first go around with a blower engine, I am going to use the 781 heads .its all I have .This thing needs to be pump gas friendly and I am on a tight budget.
    Spider Monkey Racing
    FRIENDS DONT LET FRIENDS DRIVE EGGBEATERS

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Hondo Jet blown540's Avatar
    Join Date
    Feb 2008
    Location
    Holland, Mi
    Posts
    120

    Default

    Ahh, the money thing......understood Seriously for 75 bucks you can't beat that cam! And you won't have to spend a bunch of $$ on the rest of the valvetrain. Maybe you'll even luck out and not have to buy new springs

  7. #5
    RLP
    RLP is offline
    Senior Member
    Join Date
    Oct 2008
    Posts
    164

    Default

    I know they have a solid roller like 642 lift and a 244 @50 good cam

    sorry its 242 242 @ 50 CBH2 Herbert
    Last edited by RLP; 01-02-2009 at 07:37 AM.

  8. #6
    Senior Member cave's Avatar
    Join Date
    Dec 2007
    Location
    Mesa, AZ
    Posts
    4,704

    Default

    Dry or Wet headers?
    Takin it home

  9. #7
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,856

    Default

    Quote Originally Posted by eliminator View Post
    I need advice, 454 60 over 8.25 compression 871 moonyham . does this cam sound ok , advertized duration @ .050 235/245 lift .555/580 lobe center 112' this is hyd for 2500- 6500 rpm doug herbert brand going in a ski hydro .
    I don't know all the info that you gave Doug,Chet or Don Johanssen but they have more expierence in cam grinding than most will get in a life time!! If it is what they recommend then USE IT. I swear by herbert cams and will use nothing else! I built more than 1 468 bbc and will admit they were under 6-71 blower but Herbert recommended the cam and it was I used and never dissapointed! M

  10. #8
    Senior Member eliminator's Avatar
    Join Date
    Dec 2007
    Location
    Roanoke VA
    Posts
    854

    Default

    I will be running dry zoomies
    Spider Monkey Racing
    FRIENDS DONT LET FRIENDS DRIVE EGGBEATERS

  11. #9
    Senior Member VDRIVERACING's Avatar
    Join Date
    Jan 2008
    Location
    Atlantic Beach, FL
    Posts
    1,640

    Default

    You can stay conservative on the lift with a blower, say 650-ish, which will help you valve train live longer. You'll want a wide lobe separation, around 112-114.

    Comp Cams has a blower specific cam you might want to look at, and I have had good luck with Isky grinds. Call them and give them your specifics and they can guide you on the duration, but try to stay with the lift and lobe separation above.

  12. #10

    Join Date
    Jan 2008
    Posts
    54

    Smile

    Quote Originally Posted by eliminator View Post
    I need advice, 454 60 over 8.25 compression 871 moonyham . does this cam sound ok , advertized duration @ .050 235/245 lift .555/580 lobe center 112' this is hyd for 2500- 6500 rpm doug herbert brand going in a ski hydro .
    That cam is conservitive, but will work. The problem is the other cam choices could have issues with stock length valves, causing coil bind. This is an area where it can be a can of worms waiting to be opened.

    I would like to see a little more duration on both sides like 248/252 or close to that. Water reversion is not an issue since you have dry zoomies.

    Just my 2 cents worth.
    Good Luck

  13. #11
    ptz
    ptz is offline
    Senior Member
    Join Date
    Jun 2008
    Location
    so ca
    Posts
    785

    Red face

    high lift isn't as important as lca..
    blower makes over 100 ve..

    the trick is not blowing the fuel out the exhaust..
    most of the top fuel cars run .500 lift..
    something to think about..
    like it was said..
    chet knows more than most will ever know.
    he also pioneered some of the first rollers.
    they also grind for other manufacturers..
    something else to think about.
    they offer alot of bang for the buck.

    just my .02

  14. #12
    Senior Member eliminator's Avatar
    Join Date
    Dec 2007
    Location
    Roanoke VA
    Posts
    854

    Default

    Thanks for the input, I talked with the people at comp cams and for what I am trying to do they said the cl11-556-4 was the way to go , so we will see
    Spider Monkey Racing
    FRIENDS DONT LET FRIENDS DRIVE EGGBEATERS

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95