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Grinding your motor free of marks.

Discussion in 'The Hokey Ass Message Board' started by Stone, Jul 7, 2009.

  1. Stone
    Joined: Nov 24, 2003
    Posts: 2,279

    Stone
    Member

    I read a magazine article about a cool looking .060 312 Yblock. 3x2 intake, Offy valve covers. Block and heads grinded smooth whole thing painted olds gold and white. I read another story in R&C about a rod that had a ford Mill that was dressed with Thunderbird valve covers. They had grinded the block and heads smooth too.

    I liked the smooth look and thought it would look good on the 283 I'm trying to put together.
    Does anyone have any expierence with this? Any pics of SBC that have been "smoothed" out? I especially like the idea of angering SBC purists by grinding off the "double humps".LOL
     
  2. hotrodA
    Joined: Sep 12, 2002
    Posts: 7,348

    hotrodA
    ALLIANCE MEMBER

    ONLY took me about 40 hours :eek:to get my SBC smooth.
     
  3. henry29
    Joined: Sep 5, 2007
    Posts: 2,887

    henry29
    Member

    Yeah, but think of all that power you gained!:D
     
  4. Stone
    Joined: Nov 24, 2003
    Posts: 2,279

    Stone
    Member

    The article on the Yblock said it took them around 40 hours.
     
  5. Stone
    Joined: Nov 24, 2003
    Posts: 2,279

    Stone
    Member

  6. chaddilac
    Joined: Mar 21, 2006
    Posts: 14,071

    chaddilac
    Member

  7. Ditto.. i hope my 292 looks half as good when i'm done with it.. and i'm glad i'm not crazy.. i was just out in the shop yesterday staring at my heads wondering what they would look like smoothed out..
     
  8. resqd37Zep
    Joined: Aug 28, 2006
    Posts: 3,215

    resqd37Zep
    Member
    from Nor Cal

    40 Hrs is nothing. Try polishing an aluminum block. Pain in the ***!
     
  9. Holy smokes! That is beautiful. I think B*** smoothed out his 283? 327? for his roadster project? Check his threads.
     
  10. My buddy is doing his early olds now, he is using those little 2" sanding disc's..........see how long it takes for him to finish it :)
     
  11. KreaturesCCaustin
    Joined: Sep 3, 2008
    Posts: 1,258

    KreaturesCCaustin
    Member
    from Austin, TX

    I think I just came a little
     
  12. chevy57dude
    Joined: Dec 10, 2007
    Posts: 9,655

    chevy57dude
    ALLIANCE MEMBER

    Did it to my BBC. Yeah, it took a long time, but looks really good. I think some engines lend themselves to this treatment. I kinda wish I had used a different color than Chevy orange, to make it "pop" a little more. Gold or yellow? Air angle grinder with the co**** 3M green discs and burr bits for the nooks & crannies. Get some headphones, it's tedious!:eek:
     
  13. kustombypook
    Joined: Oct 12, 2002
    Posts: 683

    kustombypook
    Member

    That is bad ***.
     
  14. chopolds
    Joined: Oct 22, 2001
    Posts: 6,325

    chopolds
    Member
    from howell, nj

    I did a how-to on this..lots of pics...when I prepped and painted the engine in the Kopper Kart. Search for "painting an engine the show car way".
     
  15. RAY With
    Joined: Mar 15, 2009
    Posts: 3,132

    RAY With
    Member

    Thats about one of the best looking Y blocks I have ever seen. Back in the 50's I bought a 34 coup from Barris and it had an olds motor that had been polished and chromed. That was the first chrome motor I had ever seen and always wondered how many hours did it take to get it that smooth? This post indicates about 40 hours and no doubt thats seems very close to actual labor hours. Thanks for posting.
     
  16. rc.grimes
    Joined: Aug 14, 2007
    Posts: 694

    rc.grimes
    Member
    from Edmond, OK

    Smoothing the engine does look great and that Y-block testifies to that. Polishing an aluminum block takes it to a whole new level of insanity cause you get the joy of polishing over and over again!
    I've never worried about what I would consider "show car details" like smoothing the block but that Y-block does have me thinking about it now. Considering I spend damn near that much time smoothing the interior of block when machining and painting valleys.....really not that crazy an idea.
     
  17. I spend a couple of hours on my engine builds grinding away casting flash. But I don't see the need to do a full polish. It is a workmanship issue for me.
     
  18. 5window
    Joined: Jan 29, 2005
    Posts: 9,983

    5window
    Member

    Hate to be contrary (okay,not really) but I don't really care for the smooth look. Grinding away casting flash is one thing, and I guess if you're building a show car that look would be fine. But, IMO, if you're building a working engine, it should look like an engine.

    But, it's your motor,if you like it, it's cool.
     
  19. 61bone
    Joined: Feb 12, 2005
    Posts: 890

    61bone
    Member

    Why would I want to spend that much time on pretty on something i'm probably going to break anyway?
     
  20. marshall
    Joined: Mar 19, 2001
    Posts: 782

    marshall
    Member
    from tacoma/wa.

    We ground the block,trans and the rear end. **** load of work
     

    Attached Files:

  21. I've had more than one set of heads go through my hands that had 40+ hours of grinding on them but I usually concentrate on the inside.

    If you look through the jalopy journal archives Ryan did an article on a roadster way back in the '90s I'm guess that had a ground smooth SBC.

    They look pretty slick smoothed out. Too much work for me but I just don't have the dicipline to build a show car qaulity car.
     
  22. Shifty Shifterton
    Joined: Oct 1, 2006
    Posts: 4,964

    Shifty Shifterton
    Member

    That's a little too engine-covery for my taste. But then again I'm a foundryman and like to see castings as castings. But it is very pretty in a car-as-sculpture kinda way

    I wonder how the paint fares against oil and heat without the normal amount of tooth to bite in?

    The few I've seen in person had major issues with adhesion over time, but I think those guys also shortcut the prep with a ton of high-fill primer.
     
  23. JeffreyJames
    Joined: Jun 13, 2007
    Posts: 16,626

    JeffreyJames
    Member
    from SUGAR CITY

    Maybe on a full out show rod that the block was to be painted white,gold, etc, but I really don't know if it looks all that great. Maybe knock down the marks a bit but I am just not sold on the completely smoothed out look.

    Now if you were painting it candy it might be a bit more necessary.
     
  24. MikeRose
    Joined: Oct 7, 2004
    Posts: 1,583

    MikeRose
    Member
    from Yuma, AZ

  25. Larry T
    Joined: Nov 24, 2004
    Posts: 7,921

    Larry T
    Member

    I spent the biggest part of my spare time one winter grinding, sanding, and rubbing on the heads, intake, and little parts on this engine. I wouldn't have done it if the casting on the Brodix heads hadn't been so ****py. Once you get started, there's no place to stop.
    Larry T

    [​IMG]
     
  26. DirtySanchez
    Joined: Aug 31, 2006
    Posts: 408

    DirtySanchez
    Member
    from So Cal

    ART! Any pics of a flatty smoothed?
     
  27. SinisterCustom
    Joined: Feb 18, 2004
    Posts: 8,277

    SinisterCustom
    Member


    Don't forget, the steering box too right??......Sure looks good!!

    I'm grinding "most" of the flash and smoothing out most of the big bumps on my SBC....prepping for nice paint.:) Still got a ways to go yet....

    [​IMG]
     

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