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Approx cost of crank regrind and straightening

Discussion in 'V8 Development and Modification' started by shane_3800, Oct 6, 2019.

  1. shane_3800

    shane_3800 Member

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    Hi all.
    As stated just looking at the aprox cost for a 304 355 crank. I know it will be above 70% of the new crank price. But is it 95% or 70%?

    Thanks.
    Shane.
     
  2. Smitty

    Smitty Well-Known Member

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    .. index grind of a V8 crank ?
    $300-350 mark
    straightening?.... oooh
    that will not be cheap

    I would talk to a specialist (Crankshaft Builders for example)... and ask them
     
  3. shane_3800

    shane_3800 Member

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    Yea just want a rough idea so I can make sure I have the cash in the bank when I call. It's a scat 355 crank that stopped dead when the rod hit the girdle after tearing the block up. Can probably grind it back in line and use holden rods but I would like to see if I can get away with chev over size bearings for the rods.
     
  4. shane_3800

    shane_3800 Member

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    It's an old engine that I pulled apart 5 years ago. Plan is to get new valves and rams heads to radius the seats on their Newen CNC seat machine and get them to do a bowl job and port match nothing major. I want to run a TP low rise dual plane and carb, yes it's not ideal for power but thats what I want because it looks old school. I'll find some decent but cheap rods and pistons chev will be good for this just hyperutetic and forged I beam. Cam I think a 6500rpm flat tappet will be the go maybe solid too but I'm a lazy mechanic so it'll end up being hyd so stock rocker ratio in that case.
     
  5. EYY

    EYY Well-Known Member

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    It’s not worth trying to save. Better off buying another crank for the $400 or so.
     
  6. shane_3800

    shane_3800 Member

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    Could you please let me know which is the best place to buy one from? Rocket ind?
     
  7. EYY

    EYY Well-Known Member

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    I got mine really cheap from vpw when they had a sale on.
     
  8. shane_3800

    shane_3800 Member

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    Thanks. they're selling for $472. But if I can get away with a regrind for $300 I might go that way.
     
  9. EYY

    EYY Well-Known Member

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    Keep in mind that you can’t always see metal fatigue or stress. I wouldn’t even chance it - but any decent engine shop will probably tell you that anyway.
     
    losh1971 likes this.
  10. shane_3800

    shane_3800 Member

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    I was planning on using crankshaft rebuilders. They will magnaflux it.
     
  11. _R_J_K_

    _R_J_K_ Well-Known Member

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    Not saying that Crankshaft Rebuilders can't do the job, but $172 (maybe) isn't a lot of money in the scheme of an engine, particularly for such a stressed and embedded component. Why would you risk the integrity of a component like that for $172? Not to mention the insurance against the stupid amount of effort and time wasted alone of build and tear down and rebuild if it does go.
     
    Last edited: Oct 7, 2019
    VS 5.0, keith reed and losh1971 like this.
  12. EYY

    EYY Well-Known Member

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    Magnaflux will show cracks, but not work hardening etc
     

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