Cfm ?
Results 1 to 6 of 6

Thread:
Cfm ?

  1. #1
    Member
    Join Date
    Nov 2015
    Posts
    92

    Default Cfm ?

    Can having too big of runners/heads for the selected valvetrain actually be detrimental or is it only a waste of money?
    Quick reply to this message Reply  

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Or Seth, either one Budweiser's Avatar
    Join Date
    Dec 2007
    Location
    Tower Park Resort, Lodi, CA
    Posts
    3,270

    Default

    Quote Originally Posted by drc9805 View Post
    Can having too big of runners/heads for the selected valvetrain actually be detrimental or is it only a waste of money?
    Too big for engine displacement at intended rpm range will be detrimental to low rpm torque and power.
    Quick reply to this message Reply  

  4. #3
    Member
    Join Date
    Nov 2015
    Posts
    92

    Default

    Quote Originally Posted by Budweiser View Post
    Too big for engine displacement at intended rpm range will be detrimental to low rpm torque and power.

    That's what I thought but I wanted to verify it here. Thanks!
    Quick reply to this message Reply  

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member
    Join Date
    Dec 2007
    Location
    Tri-Cities, TN
    Posts
    1,676

    Default

    And it happens all the time. Companies in this industry feed off the consumers ego and catch phrase " Bigger is Better". When in reality it should be "Combination is King".
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW
    Quick reply to this message Reply  

  7. #5
    Senior Member Hass828's Avatar
    Join Date
    Dec 2007
    Location
    okie, lake Texoma
    Posts
    6,275

    Default

    I agree with what these guys are telling you, BUT--- need to know the intended application & cid. If this is a jetboat, you flash right through most of that midrange that many get hung up on and are building for one specific rpm, which is usually on up the scale- and with the common cid of engines today often being over 500 inch. Makes it a little harder to "over head" the engine.

    Car or v-drive accelerating through the gears, or a heavy cruiser- maybe an outdrive-- sure it becomes more of a problem then.


    Application. JMO though.
    Last edited by Hass828; 12-20-2015 at 08:43 AM.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass
    Quick reply to this message Reply  

  8. #6
    Senior Member wagspe208's Avatar
    Join Date
    Apr 2008
    Location
    waterloo
    Posts
    2,034

    Default

    Quote Originally Posted by cstraub View Post
    And it happens all the time. Companies in this industry feed off the consumers ego and catch phrase " Bigger is Better". When in reality it should be "Combination is King".
    Amen brother.
    Wags
    Quick reply to this message Reply  

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