Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: using a torque plate
          
   
   

Reply To Thread
Results 1 to 6 of 6
  1. #1
    hpwdboss1 is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    ft. wayne
    Car Year, Make, Model: BBF mod pulling tractor
    Posts
    17

    using a torque plate

     



    I was just wondering if the head bolt attaching points in 460 blocks are far enough down the wall that torque plates are really needed. I have a really nice 040 block that I want to hone and ring, but I didn't know how much a plate will move it around. My clearance will still be ok with a clean-up hone job but if a plate moves the wall around much, it may require more material removal than I can stand & still have proper clearance.

  2. #2
    R Pope is offline CHR Member Visit my Photo Gallery
    Join Date
    Jun 2005
    Location
    Eston
    Posts
    2,270

    You've got it backwards. The "more material removal" bit comes when you hone without a plate. The plate ensures a round bore with the head torqued down the same as the plate was, so any distortion is compensated for. That said, honing is not that aggressive an operation, and most of the time, you'll never notice the difference. You're just scratching the surface, not taking away a lot of metal.

  3. #3
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Apr 2005
    Location
    bay city
    Posts
    10,546

    1to the mild part of the bores can be off as much as .003+ so it is out of round so it can pull the bore out of round making both hi and low spot in the bores you will have to hone to the low parts of the bore to get it back round this is hard for the rings to seat up this has alot to do with how thick the block is and how many head bolts are around the bores if it has had deck plates on it when hone the bores it top could be out of round if check with out deck plate on the block if not hone with deck plates and you hone it you will make the bore bigger by taking the hi spots out and were there is a hi spot so you will have to make a round at the point where you will make the hole bigger to get the tapper out to you just can not hone the top of the bore and call it good with the deck plate on. the mains should all ways be TQ up when honing the block out with or with out deck plates from boring to honing with deck plates on a engine when boring you leave more in the bore to hone out less you bore with the deck plates thru the honing to i leave about 0.002 more in the holes when i bore if i going to use a deck plate you have no idea what the bore will do with the plate QT down i seen them move were you would not think they would get out of round
    Last edited by pat mccarthy; 02-18-2008 at 12:19 PM.
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  4. #4
    hpwdboss1 is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    ft. wayne
    Car Year, Make, Model: BBF mod pulling tractor
    Posts
    17

    I guess what I really wanted to know was.. do these ford blocks move around when torqed as chevy's do? The head bolts low point of attachment relative to the cylinder bore made me think there might be less distortion. I'm sure the original bore/hone was not done with a plate. I don't know how much material would need to be removed to achieve a straight, round wall if a plate was used this time. I have about .002 clearance now and I dont want to remove any more than necessary for good seating of a new ring package.

  5. #5
    Paul Kane's Avatar
    Paul Kane is offline CHR Member Visit my Photo Gallery
    Join Date
    Sep 2004
    Location
    Bay Area
    Car Year, Make, Model: Southwind Jet Boat & Dimarco Hydro
    Posts
    326

    Cool

     



    Quote Originally Posted by hpwdboss1
    I guess what I really wanted to know was.. do these ford blocks move around when torqed as chevy's do? The head bolts low point of attachment relative to the cylinder bore made me think there might be less distortion.
    The big block chevy head bolts anchor directly in the cylinder deck (which is not much thicker than the SBC deck), while the 429/460 block's head bolt holes anchor deeper in the block in and around the entire cylinder bank and therefore work against much greater structural integrity/stiffness and do not distort the deck anything like the chevy blocks distort. When it comes to very high performance engine building, the chevy needs the torque plate a lot more than the 460.

    This is not to say that the 460 wouldn't benefit from the use of a torque plate, but the need is so minimal that if you are splitting hairs so greatly that you want to use the torque plate on the 460, you might as well pre-heat the block to operating temp prior to boring too, etc, etc.

    Paul
    Last edited by Paul Kane; 02-19-2008 at 06:18 PM.

    429/460 Engine Fanatic

  6. #6
    hpwdboss1 is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    ft. wayne
    Car Year, Make, Model: BBF mod pulling tractor
    Posts
    17

    Thanks for the feedback Paul. I felt that this was the case, but wanted some one with more experience to boost my confidence. Thanks for your time!
    Perry

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink