intake valley screen
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 14 of 27

Thread:
intake valley screen

  1. #1
    Senior Member Smallblocksperry's Avatar
    Join Date
    Jul 2011
    Posts
    397

    Default intake valley screen

    anybody have any experience doing this? putting together my Dart 540 and i would like to find out whats the best stainless mesh to use, and what kind of epoxy to install it? i know it helps out with oil hitting the camshaft and when a valvetrain failure occurs, it can save parts, any input?

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Ain't Right Racin piston in the wind's Avatar
    Join Date
    Dec 2010
    Location
    Sapulpa ok
    Posts
    1,706

    Default

    Click image for larger version. 

Name:	engine pics 009.jpg 
Views:	242 
Size:	96.6 KB 
ID:	185390


    I got tired of the epoxy.

  4. #3
    Senior Member wagspe208's Avatar
    Join Date
    Apr 2008
    Location
    waterloo
    Posts
    2,034

    Default

    Quote Originally Posted by Smallblocksperry View Post
    anybody have any experience doing this? putting together my Dart 540 and i would like to find out whats the best stainless mesh to use, and what kind of epoxy to install it? i know it helps out with oil hitting the camshaft and when a valvetrain failure occurs, it can save parts, any input?
    Oh, boy... here we go. I say no screen in most applications. Maybe drag piece. Dry sump.... sure... but here we go.
    Wags

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    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 piston in the wind View Post
    I got tired of the epoxy.
    Nice set-up. Bet you got tired of drilling holes too

  7. #5
    Senior Member Smallblocksperry's Avatar
    Join Date
    Jul 2011
    Posts
    397

    Default

    Quote Originally Posted by wagspe208 View Post
    Oh, boy... here we go. I say no screen in most applications. Maybe drag piece. Dry sump.... sure... but here we go.
    Wags

    Why not in a blown marine application?

  8. #6
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by Smallblocksperry View Post
    Why not in a blown marine application?
    Heres the problem we had with them. Depending on the course weave of the screen, if its small enough, blown engines tend to put enough blow by on the pan to disrupt the flow of oil back down to the pan. The screen blocks a certain amount of the available space for the oil to return, and the blowby to escape. Remember, the oil is going down, the crank pressure is going up. You spitting into the wind.
    If the screen increases the velocity of the upward blowby, it can hinder the flow of oil headed down. Doesn't take long and the valley is full and the pan is running dry.

    If you go to course enough screen, your not protecting anything if a rocker needle can fit thru the screen. we stopped running them when we determined that the falling oil pressure was due to LOW oil in the pan. Not empty, just low. When I hear about oil pressure dropping on some drag deals on shut down, and running GOOD pans, I just go MMmmm.wonder if the pan is FULL.



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

  9. #7
    Senior Member Bubbletop409's Avatar
    Join Date
    Jan 2008
    Location
    Castro Valley, State of Insanity
    Posts
    1,398

    Default

    Quote Originally Posted by gn7 View Post

    When I hear about oil pressure dropping on some drag deals on shut down, and running GOOD pans, I just go MMmmm.wonder if the pan is FULL.
    My last drag car was a 94 Lumina with a 540 BBC capable of low 8.40's at 165 +. I was having pressure problems in the shut down area, when I freshened the engine I updated to a Titan pump and a Billet Fab pan, full kick out, directional screen and very good baffeling. Before installing the pan I washed it out with solvent, tipping it rapidly I was impressed with its ability to control solvent, however when installed and run the problem was the same. A call to Titan opened my eyes, first question: do you have valley screens? YES Do you have a Jesel drive? YES. Low oil level is your problem son. Between the screens and the Jesel oil return to the pan was severely compromised. Advised that I add external oil return lines from the heads to pan, it my case it was easier to plumb in a 3 quart Moroso accumulator, end of problem.

    I wonder if powerful magnets would be a viable alternative.
    Last edited by Bubbletop409; 11-29-2012 at 08:42 PM.
    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

  10. #8
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by Bubbletop409 View Post
    My last drag car was a 94 Lumina with a 540 BBC capable of low 8.40's at 165 +. I was having pressure problems in the shut down area, when I freshened the engine I updated to a Titan pump and a Billet Fab pan, full kick out, directional screen and very good baffeling. Before installing the pan I washed it out with solvent, tipping it rapidly I was impressed with its ability to control solvent, however when installed and run the problem was the same. A call to Titan opened my eyes, first question: do you have valley screens? YES Do you have a Jesel drive? YES. Low oil level is your problem son. Between the screens and the Jesel oil return to the pan was severely compromised. Advised that I add external oil return lines from the heads to pan, it my case it was easier to plumb in a 3 quart Moroso accumulator, end of problem.

    I wonder if powerful magnets would be a viable alternative.
    EXCELLANT POINT Bubbletop.
    Although the hole behind the cam gear is a little elevated and will still allow oil to collect in the valley before spilling down the hole, thereby lowering the pan level by however much collects in the valley, and the Jesel cover is a perverbial plug in that hole when it comes to allowing blowby thru it. That hole is a major pathway for escaping air, and with the Jesel cover over it, the valley slots become that much more critical for blowby headed up and oil headed down. Even without the screens, the Jesel is a HUGE blockage to escaping crankcase gases, and an external line is the best bet. The Accumulator will accomlish the same thing, so long as its a drag deal. In time, and hard running boat will end up with a starved pan.
    Good info Bubbletop!



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
    Last edited by gn7; 11-29-2012 at 08:57 PM.

  11. #9
    Senior Member Bubbletop409's Avatar
    Join Date
    Jan 2008
    Location
    Castro Valley, State of Insanity
    Posts
    1,398

    Default

    Had I had all the information prior to assembling, installing, and running the engine I would have done the oil line return modification. If it had been an engine running for a long time or distance I still would have done the modification, but as Bob stated the accumulator was sufficent for my issues. So to answer the original question, I guess alot would depend on the intended use of the engine.
    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

  12. #10
    Senior Member wagspe208's Avatar
    Join Date
    Apr 2008
    Location
    waterloo
    Posts
    2,034

    Default

    Quote Originally Posted by gn7 View Post
    Heres the problem we had with them. Depending on the course weave of the screen, if its small enough, blown engines tend to put enough blow by on the pan to disrupt the flow of oil back down to the pan. The screen blocks a certain amount of the available space for the oil to return, and the blowby to escape. Remember, the oil is going down, the crank pressure is going up. You spitting into the wind.
    If the screen increases the velocity of the upward blowby, it can hinder the flow of oil headed down. Doesn't take long and the valley is full and the pan is running dry.

    If you go to course enough screen, your not protecting anything if a rocker needle can fit thru the screen. we stopped running them when we determined that the falling oil pressure was due to LOW oil in the pan. Not empty, just low. When I hear about oil pressure dropping on some drag deals on shut down, and running GOOD pans, I just go MMmmm.wonder if the pan is FULL.
    Ding ding ding ding...
    Wags

  13. #11
    Led
    Led is offline
    Senior Member Led's Avatar
    Join Date
    Jul 2010
    Posts
    1,493

    Default

    Click image for larger version. 

Name:	ImageUploadedByTapatalk1354294889.328514.jpg 
Views:	159 
Size:	80.3 KB 
ID:	185472
    If you use a screen, think about parts in pieces... These came out of the bottom of the pan, except the lifter and arm that is still in tack

  14. #12
    Member Boat 104's Avatar
    Join Date
    Jan 2009
    Location
    San Marcos, Ca
    Posts
    524

    Default

    Quote Originally Posted by Led View Post
    Click image for larger version. 

Name:	ImageUploadedByTapatalk1354294889.328514.jpg 
Views:	159 
Size:	80.3 KB 
ID:	185472
    If you use a screen, think about parts in pieces... These came out of the bottom of the pan, except the lifter and arm that is still in tack
    Never have run screens, had lifters look like that—screen would have not helped much, broke the cam and cracked the block . Picked up a used block awhile back and always wonder why two holes were added to the front of the block leading into the lifter valley, now I know why, oil drain off, a lot to be learned reading this stuff . Low oil problem, think about this, 9 qt. oil pan, 3.5 to 4 qts. in suspension and now probably two in the valley area because of a screen to catch the parts when the engine comes apart due to 2.5 to 3 qts. maybe left in the pan on deceleration nothing for the pickup.

  15. #13
    Led
    Led is offline
    Senior Member Led's Avatar
    Join Date
    Jul 2010
    Posts
    1,493

    Default

    Quote Originally Posted by Led View Post
    Click image for larger version. 

Name:	ImageUploadedByTapatalk1354294889.328514.jpg 
Views:	159 
Size:	80.3 KB 
ID:	185472
    If you use a screen, think about parts in pieces... These came out of the bottom of the pan, except the lifter and arm that is still in tack

    no screen here either, if I had one, maybe saved my cylinders and pistons a little better, less shrapnel in rotating assembly. The broke parts were larger pieces before they seen over 6K rpm worth of rotating mass.

  16. #14
    Senior Member Smallblocksperry's Avatar
    Join Date
    Jul 2011
    Posts
    397

    Default

    Quote Originally Posted by Led View Post
    no screen here either, if I had one, maybe saved my cylinders and pistons a little better, less shrapnel in rotating assembly. The broke parts were larger pieces before they seen over 6K rpm worth of rotating mass.

    thats the reason i brought it up regarding installing screens on my blower motor

    we did a 14-1 505ci that had a valvetrain failure, took everything out on the way down we dry sump'd the 505 (or in the process of dry sumping it, so it sounds like it'll be a good idea to screen that engine.

    also correct me if im wrong, but if were doing a dry sump we can block all the holes off and weld a fitting on the intake gallery and suck the oil back to the tank from there?

+ 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