First day out with new heads/cam....but I am concerned about something.
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 38

Thread:
First day out with new heads/cam....but I am concerned about something.

  1. #1
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default First day out with new heads/cam....but I am concerned about something.

    Took the boat out for the first drive since swapping out the old D2VE heads for DOVE-C's and putting in the new Comp cam. I also added roller rockers, a 10qt pan and the Milodon oil pump/pickup.

    After running the boat in the water, on the trailer for well over 30 minutes to break in the cam, changing the oil filter, and some putt-putt around the lake for a while, I decided to see what it could do.

    Well, she screams pretty good, as you can see from the short vid.
    Night vs day from the old heads.
    This motor hits 5000 rpm's in an instant.
    I don't think the top speed will be much more than before, but it gets there a LOT faster.
    My pair of Holly 450's seem pretty much maxed out, so maybe an upgrade is in order when funds are available.

    One thing does concern me greatly though...
    I have a mechanical oil pressure gauge on the back of the block, as well as an electrical gauge on the dash.
    Both were pegged at 100psi when I gunned it.
    Back down to maybe 60psi when idling.

    This cannot be normal, can it?
    Nothing was done with the stock block other than a new timing chain and the new oil pump and pan.

    Not sure if I should be worried, but I am anyway.

    100psi seems ridiculously high to me.







    100 years from now, none of this will matter.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member HotRodJosh's Avatar
    Join Date
    Oct 2010
    Location
    Spanaway, Washington
    Posts
    209

    Default

    That is a tad high....so no bearings were replaced?
    I take it the new oil pump is a high pressure pump? Or high volume?? What temp is engine at?

    My 440 in the Charger runs at 80 psi when cold....75 when warmed up and 60 at idle...been that way for 10 years without any ill effects.

  4. #3
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default

    Quote Originally Posted by HotRodJosh View Post
    That is a tad high....so no bearings were replaced?
    I take it the new oil pump is a high pressure pump? Or high volume?? What temp is engine at?

    My 440 in the Charger runs at 80 psi when cold....75 when warmed up and 60 at idle...been that way for 10 years without any ill effects.
    Didn't replace any bearings.
    The pump is just standard volume and pressure.
    The oil in there is Valvoline 20w-50 racing oil.
    Temp is normal. No stat, so it varies from 130-160ish depending on what I am doing.
    100 years from now, none of this will matter.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default

    Maybe I spun a bearing? Doesn't sound like it. Boat runs extremely strong.
    100 years from now, none of this will matter.

  7. #5
    Senior Member EVILFORCE's Avatar
    Join Date
    Oct 2009
    Posts
    5,180

    Default

    Sounds like you need to come up to CFW Saturday.
    No Fool Like A Old Fool is there?

  8. #6
    Senior Member Boat 405's Avatar
    Join Date
    Dec 2007
    Location
    San Diego, CA
    Posts
    3,732

    Default

    you're probably fine. if you spun a bearing you'd have low pressure problems.

    All the 100psi is doing is robbing hp to turn that new oil pump
    Boat 405.

  9. #7
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default

    Quote Originally Posted by EVILFORCE View Post
    Sounds like you need to come up to CFW Saturday.
    I would LOVE to, but I have to work Saturdays.
    100 years from now, none of this will matter.

  10. #8
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default

    Quote Originally Posted by widowmaker View Post
    you're probably fine. if you spun a bearing you'd have low pressure problems.

    All the 100psi is doing is robbing hp to turn that new oil pump
    Yeah, I am hoping that is all it is. I freakin' love the way this thing runs.
    100 years from now, none of this will matter.

  11. #9
    Senior Member Scapegoat's Avatar
    Join Date
    Feb 2008
    Location
    SoCal
    Posts
    1,058

    Default

    Too high of oil pressure will wear out the bearings babbitt quick. I would lower your oil weight and see if it continues. Most likely cause is the oil pump since you replaced it. It could also be from the new cam and bearings having a tight tolerence. Oil pump Relief valve is not letting oil bypass untill predetermined pressure. In your case it is pretty high. A spring change in the pump could change this. I'm not sure whats considered excessive but 100 seems high.
    High pressure from the pump can or will cause endplay on the cam. Parts could fail due to excessive stress. Play it safe and call a couple shops like BD marine or Clay Smith cams.
    Last edited by Scapegoat; 04-01-2011 at 12:36 PM.

  12. #10
    www.highflowdynamics.com LakesOnly's Avatar
    Join Date
    Dec 2007
    Location
    San Francisco Bay Area
    Posts
    1,160

    Cool

    Quote Originally Posted by jet460 View Post
    Took the boat out for the first drive since swapping out the old D2VE heads for DOVE-C's and putting in the new Comp cam. I also added roller rockers, a 10qt pan and the Milodon oil pump/pickup.
    I have a mechanical oil pressure gauge on the back of the block, as well as an electrical gauge on the dash.
    Both were pegged at 100psi when I gunned it.
    Back down to maybe 60psi when idlinng.
    Your post states, "putting in the new...10qt pan and the Milodon oil pump/pickup."

    That sounds like you changed the oil pump. Did you change the pump or not? If so, then what is the model of the pump that came out and what is the model of the pump that went in?

    100 psi is way too much for your application, for several reasons.

    Paul
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2017 Paul Kane. No copying, linking, printing or otherwise without express written permission.

  13. #11
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default

    Quote Originally Posted by LakesOnly View Post
    Your post states, "putting in the new...10qt pan and the Milodon oil pump/pickup."

    That sounds like you changed the oil pump. Did you change the pump or not? If so, then what is the model of the pump that came out and what is the model of the pump that went in?

    100 psi is way too much for your application, for several reasons.

    Paul
    Yes, I changed the oil pump and pickup as well as the pan.
    I put on a Milodon 10qt pan.
    MEL-M84DHV is the part # for the pump
    It had a stock 5 qt pan and truck type pump.
    100 years from now, none of this will matter.

  14. #12
    www.highflowdynamics.com LakesOnly's Avatar
    Join Date
    Dec 2007
    Location
    San Francisco Bay Area
    Posts
    1,160

    Cool

    Quote Originally Posted by jet460 View Post
    Yes, I changed the oil pump and pickup as well as the pan.
    I put on a Milodon 10qt pan.
    MEL-M84DHV is the part # for the pump
    It had a stock 5 qt pan and truck type pump.
    The M84DHV is a High Volume oil pump, not standard volume as you originally thought.

    Even if you have a bone stock 460 with OEM passenger car clearances the pressure seems higher than typical. Assuming the bypass piston isn't stuck (and I kinda doubt that it is, based on your overall idle/5000 rpm pressure behavior) then you ought to switch to a 10W-30 engine oil in an effort to reduce your oil pressure.

    LO
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2017 Paul Kane. No copying, linking, printing or otherwise without express written permission.

  15. #13
    www.highflowdynamics.com LakesOnly's Avatar
    Join Date
    Dec 2007
    Location
    San Francisco Bay Area
    Posts
    1,160

    Thumbs up

    Quote Originally Posted by jet460 View Post
    Took the boat out for the first drive since swapping out the old D2VE heads for DOVE-C's and putting in the new Comp cam. I also added roller rockers, a 10qt pan and the Milodon oil pump/pickup.


    Sounds nice. It's amazing how a set of ported D0VEs can transform these engines, isn't it?
    High Flow Dynamics
    Performance Components for the 429/460 Engine Family


    This post © Copyright 2007-2017 Paul Kane. No copying, linking, printing or otherwise without express written permission.

  16. #14
    Senior Member jet460's Avatar
    Join Date
    Mar 2010
    Location
    Modesto, Ca.
    Posts
    681

    Default

    Quote Originally Posted by LakesOnly View Post
    The M84DHV is a High Volume oil pump, not standard volume as you originally thought.

    Even if you have a bone stock 460 with OEM passenger car clearances the pressure seems higher than typical. Assuming the bypass piston isn't stuck (and I kinda doubt that it is, based on your overall idle/5000 rpm pressure behavior) then you ought to switch to a 10W-30 engine oil in an effort to reduce your oil pressure.

    LO
    I honestly don't remember ordering a HV pump.
    Didn't want one, but that's what I got.
    I've only run it once, so I will keep a close eye and probably switch to a lighter weight if it doesn't drop some.
    Thanks Paul.
    100 years from now, none of this will matter.

+ Reply to Thread
Page 1 of 3 1 2 3 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