Long Idle's
+ Reply to Thread
Page 1 of 3 123 LastLast
Results 1 to 14 of 36

Thread:
Long Idle's

  1. #1
    I'm No Expert Shaun's Avatar
    Join Date
    Feb 2008
    Location
    San Clemente, Ca
    Posts
    3,118

    Default Long Idle's

    Is idling for long periods of time bad on an engine, lets say something like mine, a locked out 10:1 498 stroker with iron heads a solid roller and around 650 lift?

    Every year I always talk about how it would be great to decorate the boat with some lights and drop it in the dana point harbor to do the Christmas boat parade. We do it with my gramps 40ft sail boat and it's a good hour long idle around the harbor. I'm just curious how hard this would be on an engine like mine. If this was a stock mill i wouldn't even worry about it but with the timing locked out and the cam the idle is alittle rough. A though I had to help was to just setting the timing down to 10-15* since I wouldn't be running the rpms up over 2K anyway.
    Last edited by Shaun; 12-12-2011 at 10:33 AM.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    9,923

    Default

    IMO just make sure the water valve is open enough to feed the engine enough water so it stays under 140*



    S CP

    "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"

  4. #3
    Senior Member rpm0414's Avatar
    Join Date
    Oct 2011
    Posts
    459

    Default

    Idiling worse than 4000-5000 rpm constantly? No way. X2 on the water and heat issue. I would not worry bout it. Locked out dist curve? Why? Most timing is in by 2500 anyway. You have crank trigger or just locked out dist?

  5. #4
    I'm No Expert Shaun's Avatar
    Join Date
    Feb 2008
    Location
    San Clemente, Ca
    Posts
    3,118

    Default

    I doubt temps will be an issue, the water is pretty cold! Only thing i have restricting water flow is a regulator and that shouldnt be doing anything but allowing water to flow fully at idle. Water system is -8

    rpm0414, Running a Crank Trigger yes. I know it sounds weird but at idle the engines just seams like they are fighting themselfs to stay running, where as with alittle more rpm they smooth out. My idle runs about 1100 rpm. Another though was that at idle i'm flowing less oil
    Last edited by Shaun; 12-12-2011 at 10:56 AM.

  6. #5
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    9,923

    Default

    If I recall you have a Straub cam ? if so, he knows the lobes as well as anyone ask him able the idling.

    S CP

    "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"

  7. #6
    Senior Member Futs's Avatar
    Join Date
    Dec 2007
    Location
    Orange CA, Big River
    Posts
    4,387

    Default

    I would be concerned about the lifters more than anything else. Solids right? Long idles are not good for them.

  8. #7
    Canoe Jockey Michael Thomas's Avatar
    Join Date
    Jul 2008
    Posts
    1,122

    Default

    Shaun, In the fall we will idle the mini almost all day...we like to troll for salmon. At that time of the year it is hard to even get the temp gauge off the pin..I put new spark plugs in every two years, and change the fluids twice a season..The engine has 400 + hours on it and runs great. Happy Idleing!!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	004.jpg 
Views:	22 
Size:	98.5 KB 
ID:	141493  
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

  9. #8
    gn7
    gn7 is online now
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,784

    Default

    Ill effects from a long idle on a roller is over rated. Do you think factory hyd rollers have needle oilers? Think the needles of a roller need more oil than the under foot of a flat? When rollers first cam on the scene, one of the big selling points was that they with stood idling BETTER than flat tappets
    Dry sump, vac pumped, blocked valley with a scavange line I would be concerned. With the amount of oil you've been pumping to the heads, then down thrun the valley over the cam, I would'nt worry about it too much.

    Idle a flat tappet long enough with enough spring pressure and crap oil and kiss it good bye. I would rather idle a roller than a flat tappert any day.
    I could build a engine you couldn't keep a flat tappet alive in due to lack of oil. Hard to do with a roller.
    Last edited by gn7; 12-12-2011 at 01:02 PM.
    LINK:GN-RACING.COM

    "there are too many pigs for the teats"
    Abraham Lincoln

  10. #9
    Senior Member TNYoungblood's Avatar
    Join Date
    Mar 2010
    Location
    Clarksville, TN
    Posts
    4,457

    Default

    I'd worry more about no water goin to the headers than anything, might get hot and blue em up



    WFLC Boat #321 M/E Kentucky Drag Boat Association

  11. #10
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    9,923

    Default

    Quote Originally Posted by Futs View Post
    I would be concerned about the lifters more than anything else. Solids right? Long idles are not good for them.

    It has a lot to do with spring psi. Even at 740lbs over the nose I'd have no problem with it with the 565.

    I think Shaun runs Mobil 1 oil, I wouldn't worry about that.


    S CP
    Last edited by Sleeper CP; 12-12-2011 at 12:49 PM.

    "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"

  12. #11
    Senior Member H20MOFO's Avatar
    Join Date
    Dec 2007
    Posts
    4,193

    Default

    I always thought the magic word was hippo when it came to an "idle friendly roller" thats what my crowers are. I dont know...just tryin to learn.
    Another Hot Boat refugee

  13. #12
    gn7
    gn7 is online now
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,784

    Default

    Quote Originally Posted by Futs View Post
    I would be concerned about the lifters more than anything else. Solids right? Long idles are not good for them.
    Harder on the roller needles of a solid than a hyd? How so. spring pressure? Think a roller cares about the load? Think the load is higher at an idle than the at 7000?
    Like I said, I can build an engine you could never hope to have a flat tappet live in, I doubt you could build one that could kill a roller. Not saying it can't be done, just not sure you would know how to kill a roller. Aside from to little spring pressure, or a bad lobe profile, its not easy to kill a well build roller lifter.
    Last edited by gn7; 12-12-2011 at 01:06 PM.
    LINK:GN-RACING.COM

    "there are too many pigs for the teats"
    Abraham Lincoln

  14. #13
    Senior Member Futs's Avatar
    Join Date
    Dec 2007
    Location
    Orange CA, Big River
    Posts
    4,387

    Default

    Quote Originally Posted by gn7 View Post
    Harder on the roller needles of a solid than a hyd? How so. spring pressure? Think a roller cares about the load? Think the load is higher at an idle than the at 7000?
    Like I said, I can build an engine you could never hope to have a flat tappet live in, I doubt you could build one that could kill a roller. Not saying it can't be done, just not sure you would know how to kill a roller. Aside from to little spring pressure, or a bad lobe profile, its not easy to kill a well build roller lifter.
    To each there own old wise one.

  15. #14
    gn7
    gn7 is online now
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,784

    Default

    Its not a matter of choosing. I would never tell someone NOT to buy forced oil lifters. I will simply tell you that a stock 1965 sbc with a hyd flat tappet requires oil to the cam/lifter more than a .700 lift roller. Nobody ever worried their cam would go flat sitting in traffic on the freeway. Because Crower sells hippo lifters that means there is a need for them in the average build. How did they survive for the past 60 years without the hippo feature?
    I wish had one roller lifter that died of oil starvation to convince me. But I never have.
    LINK:GN-RACING.COM

    "there are too many pigs for the teats"
    Abraham Lincoln

+ Reply to Thread
Page 1 of 3 123 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.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


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