Crank Keying Crank, Pulley and Spockets

Discussion in 'MZR Knowledgebase' started by GCPhotographers, Oct 8, 2017.

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  1. Maisonvi

    Maisonvi Platinum Member

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    Im 500+ whp and just friction washered. But looking at it when I did it I would have had to spend a whole lot more than $90 to have it done. That and my block was already assembled by a builder. Would I have liked it keyed? Of course. Is it needed? No, just a nice thing to have for both a slim chance of issue, and if you ever have to take it apart again.
     
  2. GCPhotographers

    GCPhotographers Greenie Member

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    $90 dam...In Cali, the cheapest was 300$ for the set
     
  3. Maisonvi

    Maisonvi Platinum Member

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    Yeah I was looking at $300+ as well

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    Maisonvi, via a mobile device, Oct 15, 2017
    #43
  4. djohns

    djohns Greenie Member

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    I would probably even pay $300 since like I said earlier I'm retarded so the more safety/protection I can get the better.
     
    djohns, via an iPhone, Oct 15, 2017
    #44
  5. Solarsurge

    Solarsurge Greenie Member

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    Just adding some VERY important information for anyone who might read this down the road. IF you go to your local machine shop to get your crank keyed, there's like a 99% chance they're going to use a broach and a press to key your sprockets and you're gonna have a bad time. This is a *NORMAL* procedure for keying sprockets and will work perfectly fine for the crank pulley. However, our timing and oil pump gears are so hard and brittle they will crack before you can even broach 1mm into them. If they try carbide cutters they will radius the edges. The ONLY proper way I've seen so far is EDM cutting. That's how Massive Speed does it, how Speed Perf6rmanc3 does it, and how your shop should do it, too. If your shop doesn't do EDM cutting, find another shop.

    Ask me how I know:
    [​IMG]
     
    Last edited: Aug 3, 2018
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  6. Fstrnyou

    Fstrnyou Greenie Member

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    My build: keyed by SP63, pinned by me.
    The keying on mine was slightly off too. Sensor fully seated to one side was almost perfect alignment. I figure it's off by about 1 degree.
     

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    Fstrnyou, via a Samsung mobile device, Aug 16, 2018
    #46
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  7. Solarsurge

    Solarsurge Greenie Member

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    Further fuck-up to add to the above cracked sprockets. The same shop that cracked the sprockets also apparently keyed the crank upside down and I just now noticed after a week of trying to figure out why my new built motor wouldn't start. The keyway should be at top dead center of cylinder 1/4 on the crank, and the bolt hole in the crank pulley should be at 180 degrees from the keyway (on the bottom). NOT on the same side, like these morons did.[​IMG]
     
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  8. Maisonvi

    Maisonvi Platinum Member

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    Damn, thats some rough shit.
     
  9. Littleloogy

    Littleloogy Recovering Speed Addict Platinum Member

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    That sucks, but can’t you just pry the timing teeth apart from the pulley and turn that 180 degrees as press it back on with your manly thumbs? Should still work, no?


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    Littleloogy, via a mobile device, Sep 19, 2018
    #49
  10. Solarsurge

    Solarsurge Greenie Member

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    That bolt hole being in the correct location serves several functional purposes including, but not limited to, knowing what degree my crank is at without putting screw drivers in my cylinders. An upside down crank pulley does not.


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    Solarsurge, via a mobile device, Sep 19, 2018
    #50
  11. Littleloogy

    Littleloogy Recovering Speed Addict Platinum Member

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    That is true and drilling taping a new hole in the timing cover would be a big pain in the ass and confusing to anyone who works on your engine in the future. Just was throwing ideas out there man.


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    Littleloogy, via a mobile device, Sep 20, 2018
    #51
  12. Westbound

    Westbound Greenie Member

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    Not to revive dead threads wanted to pass along some info I came across regarding the keyed crank costs. As I was doing research into the popularity of the 2.5 ford short block replacement for our 2.3 motors for when the ZZB happens, and came across a huge difference in costs!

    Massive is selling the Keyed Mazdaspeed crank for $1,200. And the 2.5 Ford Fusion Keyed crank for under $500.

    Aren't these the same thing?

    ~ Ian
     
  13. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    The Mazdaspeed crank is much stronger
     
    Easter Bunny, via a mobile device, Mar 15, 2021
    #53
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  14. Westbound

    Westbound Greenie Member

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    That would explain a cost difference, thank you!!
     
  15. BAT-man

    BAT-man BANNED Greenie Member

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    Cant find delete post button..sorri
     
    BAT-man, via a mobile device, Oct 22, 2021
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