Author Topic: How to build your own racing connecting rods?  (Read 5242 times)

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pbf777

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Re: How to build your own racing connecting rods?
« Reply #30 on: July 31, 2021, 07:02:15 PM »
     Based on the picture, if crankcase, camshaft or whatever would permit it, I would want to adopt a greater taper in the beam, particularly being wider at the juncture of the big-end reducing the 'shoulders' or distance from the beam juncture to the bolt-posts; otherwise just additional heft to these 'shoulders' to reduce the tendency for the big-end I.D. to change dimension upon being loaded.

     As for a rather exaggerated example, look at the Ford/Mercury M.E.L. 430/462 connecting rod.  Though to much and one finds that in machining for the retaining bolt, one creates effectively a 'notch' this in particularly the "I"-beam flange,........not good! 

     As I often say:  Just another comment from the peanut gallery!      ::)

     Scott.
« Last Edit: July 31, 2021, 07:09:44 PM by pbf777 »

Hemi Joel

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Re: How to build your own racing connecting rods?
« Reply #31 on: August 01, 2021, 11:53:09 PM »
We will look into that idea, thanks

Hemi Joel

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Re: How to build your own racing connecting rods?
« Reply #32 on: August 03, 2021, 01:44:57 PM »

All aircraft quality, steel parts are usually, started with either annealed or normalized material, then rough out, sent for HT, then finished machined, MPI and then plated, if needed. I never made any that plating, wasn't a spec.

FRNKEORE, could you tell me more about this MPI and plating process?   I appreciate your input. Thanks, Joel

frnkeore

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Re: How to build your own racing connecting rods?
« Reply #33 on: August 07, 2021, 10:16:21 AM »
I'm sorry to be so late getting back to you.

All steel aircraft parts are magnetic particle inspected (MPI) and most all are cadmium plated. MPI is the same as "Magnaflux".
Frank

Hemi Joel

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Re: How to build your own racing connecting rods?
« Reply #34 on: August 09, 2021, 07:48:15 PM »
Thanks for the info Frank. Does that CAD plating serve any purpose other than corrosion protection? I don't think we need corrosion protection in the crankcase.

frnkeore

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Re: How to build your own racing connecting rods?
« Reply #35 on: August 10, 2021, 01:24:00 AM »
Yes, just basically corrosion protection
Frank