Vacumm Pumps on non race motors
+ Reply to Thread
Page 1 of 10 1 2 3 4 ... LastLast
Results 1 to 14 of 129

Thread:
Vacumm Pumps on non race motors

  1. #1
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,736

    Default Vacumm Pumps on non race motors

    Is there any value besides the obvious of hp gain at higher rpm to running a vacumm pump on a non race application.

    Here is my scenario

    21' daytona.
    509 11 to 1 compression
    conventional heads
    around 750 - 800 hp on motor
    pump gas
    200 shot of n20.

    spend most of its life at idle to 3500 rpm with occasional kilo passes.

    I'm I going to gain enough to make it worth the $1000. Or are there any benefits besides at full throttle?
    Boat 405.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member Ronboats's Avatar
    Join Date
    Jun 2009
    Location
    Norcal-Santa Rosa
    Posts
    612

    Default

    What are "Kilo" passes? And how many "lid" passes in a Kilo pass??

  4. #3
    Senior Member Factory1's Avatar
    Join Date
    Oct 2008
    Posts
    1,134

    Default

    It's going to make better power throughout the entire rpm range due to increased ring seal. Second your chances of blowing out gaskets such as oil pan, timing chain cover, valve cover, and intake will be greatly reduced because you are taking the inside of your motor from a pressurized state to that of a vacuum. Oil leaks are greatly reduced as well. If you can afford it, it's worth the investment in my opinion. F1~

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,736

    Default

    Quote Originally Posted by Ronboats View Post
    What are "Kilo" passes? And how many "lid" passes in a Kilo pass??
    inside joke. sorry. basically WOT for a while...
    Boat 405.

  7. #5
    Red Blooded American The Doctor's Avatar
    Join Date
    Jan 2008
    Location
    Peoria, AZ
    Posts
    15,853

    Default

    It can help suck the oil off your cylinder walls and wear out rings faster so you can rebuild it as often as a race boat.
    Hope that helps
    The best things in life aren't things!

  8. #6
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,736

    Default

    Quote Originally Posted by Factory1 View Post
    It's going to make better power throught the entire rpm range due to increased ring seal. Second your chances of blowing out gaskets such as oil pan, timing chain cover, valve cover, and intake will be greatly reduced because you are taking the inside of your motor from a pressurized state to that of a vacuum. Oil leaks are greatly reduced as well. If you can afford it, it's worth the investment in my opinion. F1~
    Okay cool this is what I was looking for. Thank You.
    Boat 405.

  9. #7
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,736

    Default

    Quote Originally Posted by The Doctor View Post
    It can help suck the oil off your cylinder walls and wear out rings faster so you can rebuild it as often as a race boat.
    Hope that helps
    fwiw. I was thinking of running 12 to 14 inches vacumm
    Boat 405.

  10. #8
    Senior Member Factory1's Avatar
    Join Date
    Oct 2008
    Posts
    1,134

    Default

    Quote Originally Posted by widowmaker View Post
    fwiw. I was thinking of running 12 to 14 inches vacumm
    I've been told that 18" of vacuum is where you will have problems with the motor losing wristpins. Unless you are running a drysump, 4 vane pump, and low tension total seal gapless rings, I doubt you have to worry about it....
    Last edited by Factory1; 11-18-2009 at 08:49 PM.

  11. #9
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,736

    Default

    Quote Originally Posted by Factory1 View Post
    I've been told that 18" of vacuum is where you will have problems with the motor losing wristpins. Unless you are running a drysump, 4 vane pump, and low tension total seal rings, I doubt you have to worry about it....
    I've heard the same. We run 16 to 17 in the big chief dry sump motor. But that motor is a max effort drag race only motor.
    Boat 405.

  12. #10
    Red Blooded American The Doctor's Avatar
    Join Date
    Jan 2008
    Location
    Peoria, AZ
    Posts
    15,853

    Default

    Quote Originally Posted by widowmaker View Post
    fwiw. I was thinking of running 12 to 14 inches vacumm
    It was a lame attempt at a joke. Not my first failure.
    The best things in life aren't things!

  13. #11
    Senior Member Factory1's Avatar
    Join Date
    Oct 2008
    Posts
    1,134

    Default

    We all fail from time to time, just gotta dust ourselves off and keep trying!

    It will also stop the blowbye at high rpm from pushing that nice oily mist out of your breathers and dirtying up your boat.

  14. #12
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,736

    Default

    Quote Originally Posted by The Doctor View Post
    It was a lame attempt at a joke. Not my first failure.
    lol.. oh I like projects though
    Boat 405.

  15. #13
    Red Blooded American The Doctor's Avatar
    Join Date
    Jan 2008
    Location
    Peoria, AZ
    Posts
    15,853

    Default

    Quote Originally Posted by Factory1 View Post
    We all fail from time to time, just gotta dust ourselves off and keep trying!

    It will also stop the blowbye at high rpm from pushing that nice oily mist out of your breathers and dirtying up your boat.
    Isn't that what evac tubes into the headers are for?
    The best things in life aren't things!

  16. #14
    Senior Member Woods 017's Avatar
    Join Date
    Dec 2007
    Posts
    1,868

    Default

    Quote Originally Posted by Factory1 View Post
    I've been told that 18" of vacuum is where you will have problems with the motor losing wristpins. Unless you are running a drysump, 4 vane pump, and low tension total seal rings, I doubt you have to worry about it....
    I galled a set of wrist pins in one season w/ 14in of vacuum. We opened the pin tolerances up a couple of ten thousandths and went to a DLC coated pin and everything has been great since.

+ Reply to Thread
Page 1 of 10 1 2 3 4 ... LastLast

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

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