What is the history of Hellcat supercharger pulley crank pinning?

Discussion in 'SRT Hellcat Maintenance' started by BULL, Jan 26, 2016.

  1. BULL

    BULL ________173.7mph_______ ___2016 Colorado Mile___ Gold Supporting Member

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    If you have specific knowledge of where crank pinning originated, I would like to hear it.

    My understanding of it is that it was a fix that came about specifically for HC's and their tappered/diamond dust fit lower SC pulley and the associated failures that happened to a certain number of cats.

    Any crank I've ever dealt with (admittedly not many but more than a few...) has been keyed. This seems to be the logic that was applied in this fix.

    Is it really this simple or is there more to the history than that?

    Are there other engines out there that are utilizing this fix?

    I'm aware of two versions of the fix, one that I'll refer to as "radial" and one as "axial' (one arrangement is in "radial-shear", the other in "axial-shear").

    I've got an initial opinion that I'd like to share with everyone here, but I need to get a bit more back ground before I go spouting off at the pie-hole.

    EDIT:

    For those that don't know, this train of thought isn't just a random thought or by someone who doesn't know his *** from a hole in the ground. I've got more than a few years experience and schooling to back up what I suspect is at hand here. It's not to brag, but only to qualify myself in an internet setting where I could be just ANY idiot versus my particular brand of idiot...
     
    Last edited: Jan 26, 2016
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  2. blaze

    blaze ☆★✪ The Watcher ✪★☆ Hellcat Car Club Gold Supporting Member

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    same here BULL.. i will be keeping my pie hole shut but have many questions about this..
     
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  3. owenspackman

    owenspackman BritishCat

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    I can't claim to know anything about the history of pinning cranks. But the LS community have been doing it for a long while on their Supercharged motors. It's certainly not something new just for the Hellcat. I know the Mopar community adding aftermarket S/C have been pinning too. That's about all I know.
     
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  4. terryturner

    terryturner Silver Member

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    If it's been around for so long I don't see why it's not being done at the factory. Seems like it'd be a smallish cost for much added insurance on warranty claims. Those engines that have been replaced under warranty were way more expensive than a small pin or 2
     
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  5. PlumTexasCrazy

    PlumTexasCrazy HELLCAT LIFE MEMBER Hellcat Car Club HCC Charter Member

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    Open your pie holes!!! Lol
     
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  6. blaze

    blaze ☆★✪ The Watcher ✪★☆ Hellcat Car Club Gold Supporting Member

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    muahahahhahahhaha
     
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  7. blaze

    blaze ☆★✪ The Watcher ✪★☆ Hellcat Car Club Gold Supporting Member

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    seriously though.. someone should open their pie holes on this.. i would like to know how why when who and where on this subject.. and maybe even some are you sures?
     
  8. blaze

    blaze ☆★✪ The Watcher ✪★☆ Hellcat Car Club Gold Supporting Member

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    BULL what is on your mind? we may all be wondering the same thing. i am an exceptional idiot and can provide testimony of that fact..

    applying this fix will void the warranty correct?
     
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  9. BULL

    BULL ________173.7mph_______ ___2016 Colorado Mile___ Gold Supporting Member

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    Many things, 'could write a book. Not many would read it I suspect.

    I'll spew some of it after I get some more homework done. I've got a few requests going in the background going at the same time.

    Sneak peek :

    From an engineering standpoint one of the two fixes is wrong, or at the very least, very much less than ideal.

    The other one isn't great either or at the very least could be significantly improved via specific instructions / procedures.

    Communicating this effectively via the Internet is fraught with danger however, I fear a war over what really should be fixed by Dodge in the first place.
     
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  10. Aaron Vogel

    Aaron Vogel Silver Member

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    I'd be curious to hear about this as well. For example the edelbrock kit has you pin the crank as well. Why didn't Dodge? Who knows. I would think that the way they designed it is stout enough when installed properly. But if those few engine that has problems had the wrong torque applied to the crank bolt, then that would explain why some slipped. Is it a common failure or trend? I wouldn't think so. Is it an isolated case involving a handful of motors? Sure. If you're running everything stock i would go with there design being acceptable. If you are modding, different pulley etc, then i can't see the harm in pinning.
     
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  11. BULL

    BULL ________173.7mph_______ ___2016 Colorado Mile___ Gold Supporting Member

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    I may approach this in a different way:

    If I were to make a kit that was "on the next level" regarding quality of components, process and control, how many people would be interested???

    It would be more precisely jigged for better control of the process AND the operator...
     
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  12. blaze

    blaze ☆★✪ The Watcher ✪★☆ Hellcat Car Club Gold Supporting Member

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    damn BULL, i am getting popcorn for this thread.. this is getting exciting.
     
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  13. BULL

    BULL ________173.7mph_______ ___2016 Colorado Mile___ Gold Supporting Member

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    If anyone has one of these kits (axial style - drill from the front) that they are willing to either sell or lend to me, I would appreciate it!

    (I can use more than one for the purpose of dimensional investigation)
     
  14. TrackDay

    TrackDay Silver Member

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    All this talk about pinning. Perhaps an enterprising person could just figure out a torque spec that would increase the clamp load and put the damper bolt into yield.
     
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  15. BULL

    BULL ________173.7mph_______ ___2016 Colorado Mile___ Gold Supporting Member

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    I was keeping that to myself, but that really is the better answer, but it should/needs to come from Dodge
     

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