vacuum pump on a endurance motor
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 14 of 25

Thread:
vacuum pump on a endurance motor

  1. #1
    Senior Member
    Join Date
    Dec 2008
    Posts
    179

    Default vacuum pump on a endurance motor

    anyone have any vac pump advice for a endurance engine, so far i have std evac system but dont have any # as to how much it will pull, not much as i remember. maybe 3-6 lbs vacuum witch is not much. and thats only at high rpms

    anyone think one of the new electric pumps would work? i would like to pull around 9-12 lbs thru all the rpm ranges

    engine is bbc 4.600 bore 4.250 stroke w/ring pkg .043/.043/3/16 low ten setup oh ya wet sump system
    also man are the mfg proud of the belt setups $$$$ big dollars for hp gain 30-50 hp and i was told not very good for enduranc app.????

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Apr 2008
    Location
    LaPorte Indiana
    Posts
    239

    Default

    I'm setting my motor up for one as we speak and have confidence it will work fine. I will be running a Star Machine Pump belt driven pump. I am going to run gapless top rings with a napier second and a low tension oil ring. I will also be running DLC coated pins. I plan on pulling 10-12 inches.

    Hopefully there is a nice little HP gain. We'll see!

    Craig

  4. #3
    Senior Member Bubbletop409's Avatar
    Join Date
    Jan 2008
    Location
    Castro Valley, State of Insanity
    Posts
    1,412

    Default

    Quote Originally Posted by flat601 View Post
    anyone have any vac pump advice for a endurance engine, so far i have std evac system but dont have any # as to how much it will pull, not much as i remember. maybe 3-6 lbs vacuum witch is not much. and thats only at high rpms

    anyone think one of the new electric pumps would work? i would like to pull around 9-12 lbs thru all the rpm ranges

    engine is bbc 4.600 bore 4.250 stroke w/ring pkg .043/.043/3/16 low ten setup oh ya wet sump system
    also man are the mfg proud of the belt setups $$$$ big dollars for hp gain 30-50 hp and i was told not very good for enduranc app.????
    I had an electric vacumn pump on a 540 drag motor in my Super Class Lumina. Prior to the muffler DBA rule I had run a pan-e-vac system plumbed into my collectors, tryed running the same setup with Borla collector mufflers, but could not get enough vacumn in the collectors and began to notice a slight amount of condensation in the oil seperators. I switched over to an electric vacumn pump discharging into a vented catch can, worked well for that application, but would max out at 6 in LBS. Better than nothing, but not going to generate enough vacumn to show a power increase, and may not be able to control oil on a low tension ring setup.
    Larry

    62 Bel-Air 409
    260 Eagle XP HP500EFI
    2016 Corvette Z51
    79 Cole TR-2 Sunset Racecraft 565 (RIP Tracy)
    Remember in November
    Well done USN Seal Team 6

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member jetjunky's Avatar
    Join Date
    Jul 2008
    Location
    Diamond Bar, Big River
    Posts
    1,145

    Default vac pumps

    I was informed by the engine builder who was rebuilding my 2yr old 540 bbc that the reason my wrist pins were so tight on 4 of my pistons was because of the moroso 3 vane pump I was running. 1 piston was so tight it would have probably broke the next time or two I was out and that would surely have hurt my dart block. He said he had other motors he had built with vacuum pumps that had the same problem. The pump did not go back on with this freshening. He suggested drag race only or check your motor often. It's for sale if your still interestd in running one. Just my $.02

  7. #5
    cfm
    cfm is offline
    Banned
    Join Date
    Jan 2008
    Posts
    1,263

    Default

    jetjunky - what "Hg where you running ? What preperations did you make with the pins ?

    How did you run your boat ? ie: quick blasts ? some cruising - how long at a time ? WFO for minutes on end ?

    No answers from me, just looking for data.

  8. #6
    B1 Racing cs19's Avatar
    Join Date
    Dec 2007
    Posts
    6,523

    Default

    Weve had some issues with wrist pins, pretty sure it was a galling issue from the vacuum and not the pins flexing. I went to a stouter DLC pin, problem gone.
    B1Racing.net

  9. #7
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Maybe someone could come on here and clue us in on how much "depression" a Cup car pulls. This is something I have wondered about myself, with either a dry sump or vac pump. I think DLC, or Casidium pins would be a "must do"



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  10. #8
    Senior Member
    Join Date
    Dec 2007
    Location
    Tri-Cities, TN
    Posts
    1,681

    Default

    Quote Originally Posted by gn7 View Post
    Maybe someone could come on here and clue us in on how much "depression" a Cup car pulls. This is something I have wondered about myself, with either a dry sump or vac pump. I think DLC, or Casidium pins would be a "must do"
    15 to 20 in many professional applications is not unheard of. Special front, rear main, and valve seals are used. Pin oiling, skirt oiling are all mods that are being used along with coated parts.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

  11. #9
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Yeah that figures. Should have known not ask that question. Squiters everywhere, special everything, and about $x0,000.00 out of my price range So now the question becomes, how much vac can you pull with minimum mods, pins, and maybe spring oilers, and still make it worth doing. Don't know if there is much value to it if you don't pull at least 12"



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  12. #10
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    10,075

    Default

    Quote Originally Posted by gn7 View Post
    Don't know if there is much value to it if you don't pull at least 12"
    Of all the stuff I've read( lot's of it) 9-14" is the window for power with out problems. Beyond 14" you can create some problems for yourself. Many say to not exceed 12" without proper prep of pins.

    Quote:

    The proper amount of vacuum will improve ring seal. C&S research indicates you can have too much. About 10” to 14” of vacuum at 7000 RPM yields the highest power gains. This agrees with tests done by Bill Jenkins. Besides losing power, “too much” vacuum consumes more power and can collapse oil pans, cause oil leaks, and suck gaskets.

    http://www.candsspecialties.com/store/html/pumppan.html

    I was going to put one of these on this Winter but I heard from Jon Kaase that doesn't recommend the vac pumps with the Ford type oil pump. He has found issues with oil cavitation. For endurance engines he told me to stay away from them to be safe. I kind of wanted the extra HP but for now I'll leave it alone.


    Sleeper CP
    Last edited by Sleeper CP; 03-19-2009 at 08:21 AM.

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

  13. #11
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,507

    Default

    Dry sump and get the best of both worlds.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  14. #12
    Lurker
    Join Date
    Dec 2007
    Location
    NC
    Posts
    1,417

    Default

    Quote Originally Posted by gn7 View Post
    Maybe someone could come on here and clue us in on how much "depression" a Cup car pulls. This is something I have wondered about myself, with either a dry sump or vac pump. I think DLC, or Casidium pins would be a "must do"
    A typical Cup car will see between 20-25 inches of "Depression".

    FYI




    Main Entry: 1vac·u·um
    Pronunciation: \ˈva-(ˌ)kyüm, -kyəm also -kyü-əm\
    Function: noun
    Inflected Form(s): plural vac·u·ums or vac·ua \-kyə-wə\
    Etymology: Latin, from neuter of vacuus empty, from vacare to be empty
    Date: 1550
    1: emptiness of space
    2 a: a space absolutely devoid of matter

    The term depression is used because scientifically speaking, the only "True Vacuum" is a black hole (definition 1,2). Every thing else is just a depression!

  15. #13
    Senior Member
    Join Date
    Dec 2008
    Posts
    179

    Default

    my pins are not coated,thats why i was looking to run in the 9-12 range..

    anyone have any # on pan evac setup ? dont think it will pull over 6 even at
    6000 rpm.

    so how do the oem market run these ultra thin rings without proublems?

  16. #14
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,507

    Default

    Thin rings are lightert for less mass, but not necessarily low tension. They also have less surface area which means less drag. They've also gotten pretty specific on cyl finishes which makes a huge difference.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

+ Reply to Thread
Page 1 of 2 1 2 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

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