Install Car built 454 in Boat.what can I do? - Reply to Topic

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Topic Review (Newest First)

  • 06-17-2008, 01:59 PM
    kcsteck
    Thanks Tom..

    Sure glad we took it apart then. I didnt want to take any chances and have a grenade on my hands...Cant wait to get it in the boat and see the difference from the Olds to the Chevy!

    Thanks


    See ya soon

    Kc
  • 06-16-2008, 10:00 PM
    jetboatperformance
    Casey your motors looking good and (clearenced) ready for "cam degree-in/install and piston valve clearance check , cam should be here Wednesday ,Average piston to wall prior to work was .003 ,we rejected one rd brg for the score (prior dirty assembly) see ya soon Tom

  • 06-07-2008, 09:03 PM
    milkmoney
    casey, i am sure you are aware of this but i think you made the right decision, tom is nothing but above and beyond his customers expectations.. i dont have near as far to drive as you did, i know i would not hesitate to drive as far as you did to have tom take care of me.. just my.02
  • 06-07-2008, 08:31 PM
    jetboatperformance

    Thanks

    Casey Thanks for the Confidence and makin the trip ! Good to meet you as well, That motor need to come apart ! We will keep the thread updated BTW heres the new Project you saw come in after a little Scubbin" its got a lot of potential ! Look out "Pink Taco"

    (sorry for the thread jack)


  • 06-07-2008, 07:56 PM
    Some Kind Of Monster
    Quote Originally Posted by kcsteck View Post
    thanks for everyones input. I apreciate it.
    I did the best thing and am havin a profesional look at it. I drove it down to Tom & Josh at Jetboatperformance today. 360 mile round trip.Im bushed!

    Tom & Josh def was nice to meet both of you today and finally put a face to a name and voice. Thanks for always helpin me out.


    Casey
    Definitely post up what they find
  • 06-07-2008, 06:51 PM
    kcsteck
    thanks for everyones input. I apreciate it.
    I did the best thing and am havin a profesional look at it. I drove it down to Tom & Josh at Jetboatperformance today. 360 mile round trip.Im bushed!

    Tom & Josh def was nice to meet both of you today and finally put a face to a name and voice. Thanks for always helpin me out.


    Casey
  • 06-07-2008, 06:12 PM
    SmokinLowriderSS
    I would think the best way to measure them would be to mic the bore, mic the piston (accross the pin area) and do math.

    In that method, a .007" clearance IS a .0035" all the way arround.

    Am I right, or off base?
  • 06-07-2008, 09:49 AM
    jetboatperformance
    Casey per our conversation just now check the link (and chart) below ,this is not neccesarily applicable to YOUR pistons but will give you some Ideas maybe? Note that piston to cyl wall (and ring end gaps vary) and change depending on application piston type etc IF this motor was "seasoned" with some miles on it in a car things might be different but I would fear problems for you if it was set up with skinny clearances Call me later if I can help you more I'll be in all day Tom

    http://kb-silvolite.com/article.php?action=read&A_id=32


    AUTO APPLICATIONS
    APPLICATION Hypereutectic Forging
    Ring End Gap Factor Suggested Piston To Wall Clearance Ring End Gap Factor Suggested Piston To Wall Clearance
    Bore To 4.100" 4.100" & up Bore To 4.100" 4.100" & up
    Street - Normally Aspirated .0065" .0015" - .0020" .0020" - .0025" .0040" .0035" - .0045" .0045" - .0055"
    Street - Towing .0080" .0015" - .0020" .0020" - .0025" .0045" .0040" - .0050" .0050" - .0060"
    Street - Nitrous or Supercharged .0080" .0020" - .0025" .0025" - .0035" .0050" .0045" - .0055" .0055" - .0065"
    Circle Track - 2 BBL or Restrictor/Gas .0070" .0015" - .0045" .0020" - .0050" .0040" .0040" - .0050" .0055" - .0065"
    Circle Track - Unrestricted .0080" .0025" - .0045" .0030" - .0045" .0040" .0045" - .0065" .0055" - .0075"
    Circle Track - Alcohol Injection .0060" .0025" - .0045" .0025" - .0050" .0040" .0045" - .0065" .0055" - .0075"
    Circle Track - Alcohol Carbureted .0080" .0030" - .0045" .0030" - .0050" .0045" .0050" - .0070" .0060" - .0080"
    Drag - Gasoline .0075" .0015" - .0045" .0020" - .0045" .0040" .0050" - .0070" .0060" - .0080"
    Drag - Alcohol .0065" .0015" - .0045" .0020" - .0045" .0040" .0040" - .0070" .0050" - .0080"
    Drag - Supercharged or Nitrous Gas .0095" .0020" - .0045" .0025" - .0050" .0050" .0060" - .0090" .0070" - .0100"
    Drag - Supercharged Alcohol .0085" .0015" - .0045" .0025" - .0045" .0050" .0050" - .0070" .0060" - .0080"
    Drag - Supercharged Fuel .0115" .0030" - .0050" .0035" - .0055" .0060" .0070" - .0100" .0080" - .0110"
    Marine - Normally Aspirated .0080" .0030" - .0045" .0035" - .0050" .0040" .0045" - .0060" .0055" - .0070"
    Marine - Supercharged .0090" .0030" - .0045" .0035" - .0050" .0045" .0055" - .0070" .0065" - .0080"
    Air Cooled Baja .0075" .0030" - .0045" .0035" - .0050" .0040" .0050" - .0070" .0060" - .0080"
    Propane .0065" .0015" - .0045" .0020" - .0045" .0040" .0035" - .0070" .0045" - .0080"
    Supercharged Monster Truck / Mudbog .0090" .0025" - .0045" .0030" - .0050" .0060" .0080" - .0100" .0090" - .0110"
  • 06-07-2008, 09:25 AM
    Cas
    Quote Originally Posted by kcsteck View Post
    did I do this correctly or should I take block to a machine shop and have them check it for me.you all are makin me hell of nervous.LOL I dont want a repeat of what happend on my OLDS

    Casey
    I'd bring it to a machine shop if you're having doubts in the measuring. You also need to find out if the cylinders are round top to bottom. If they aren't, you'll need to find out how much needs to come off the walls to make them that way again.
    For me, it was well worth taking the block along with the rotating assembly to have it all checked out.
  • 06-07-2008, 08:50 AM
    kcsteck
    maybe I didnt measure correctly or with the correct tool. I used a Digital sliding caliper that has like a 1/2 reach for inner measurement and measured the very top edge of cylnder to get the 4.284 to get .003-.0035 clerance the pistons are forged L2465f30 Speed Pro/TRW and are 4.281 per manufacturer. I didnt measure the piston my self.

    did I do this correctly or should I take block to a machine shop and have them check it for me.you all are makin me hell of nervous.LOL I dont want a repeat of what happend on my OLDS


    Casey
  • 06-07-2008, 07:59 AM
    River Rat 005
    I ran a stock pan on mine for years. Just got to use a stock volume pump. A high volume pump will suck the pan dry and drop oil pressure. Only reason I'm not using it is I made it into a box pan to use on my hydro.
  • 06-07-2008, 03:41 AM
    SmokinLowriderSS
    Quote Originally Posted by kcsteck View Post
    hey smokin I read it was .002 -.004 for car specs are your specs for marine specs? .006-.007? basilcy double what I have?
    Please advise.
    I thought I saw on this post that If i was near the higher side of the car specs .003 or more like I am that id be ok.Is that not the case?"

    Check the clearances. If they are anywhere close to the mid-point of the factory clearances or wider, it'll be fine."
    If it is close to minimums, don't do it.
    I believe it was you that said that if Im not mistaken. Maybe I misunderstood.
    is the factory clearances .002-.004 and High performance is .006-.007?

    Casey
    Yes, I said that, and that is where my 454 is quite happy.

    The specs I quoted are straight from GM's own Chevrolet Power Catologue, 6th edition. They are the "High Performance" specs, not "car" or "marine" or "truck" specs.

    For cylinder to bore clearance, go to the piston maker's info.
    The piston clearance was spec'd in the book as "with GM forged pistons", which I didn't type in.
  • 06-07-2008, 03:25 AM
    396_Ways_To_Spit
    Quote Originally Posted by RCB19 View Post
    If you want your marine (cold block) engine to last .005-.055 piston to cyl wall clearance and set the rings up at .005xbore diameter for top ring, .0055xbore diameter for second ring and check the oil ring to make sure it is not less than .015. For the bearings .003 on the mains and .0025-.003 on the rods. Set the pistons up to be .005 in the hole. Just some basics to follow here for a good marine engine.



    This is PERFECT advice right here!!!!!!!
  • 06-06-2008, 11:57 PM
    TRG
    Quote Originally Posted by RCB19 View Post
    Word has it she makes a mean one.
    She's gettin better, or worse kinda depends on where you stand! lol
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