Tell me how well this will work.....

[blykins]

This was done by one of our highly thought of crank grinders...

Luckily, it's the crank for my 352 project and not a customer's piece.  But still....

He ground it a couple of years back and I'm just now getting around to checking the balance on the crank. 

[WConley]

I think the question should be, "How long will this work??"

Holy stress-riser, Batman!  At least you'll be getting lots of earl to that rod 

[SMA390]

Maybe that rod and piston will be faster

[Barry_R]

I have seen similar stuff before and I have pretty much hated it all the time.
Never caused a problem that I was aware of, but that oil crater gets really close to be exposed to the outside of the rod bearing - a major no-no

[mike7570]

Those aluminum rods fit a Honda journal?
here's mine with a 2.20

[blykins]

That's the second crank that I've had issues with from this guy.  Last time, I paid $1400 to have a 391 crank ground down and then had to have it ground again locally because the thrust surface had .004" of run-out. 

As George Bush would say....

"Fool me once, shame on — shame on you. Fool me — you can't get fooled again.”

I know he saw it because he chamfered the hole.....

[blykins]

Those aluminum rods fit a Honda journal?
here's mine

No sir, they are BBC rods. 

[mike7570]

That's the second crank that I've had issues with from this guy.  Last time, I paid $1400 to have a 391 crank ground down and then had to have it ground again locally because the thrust surface had .004" of run-out. 

As George Bush would say....

"Fool me once, shame on — shame on you. Fool me — you can't get fooled again.”

I know he saw it because he chamfered the hole.....

My 391 above was done for $700.00 (plus a discount for the long wait)

[blykins]

Anyone got a 361 crank they wanna sell?

[mike7570]

Were you changing the stroke and he offset it incorrectly? 

[68fecyclone]

   I have one, its been turned .020 on mains and rods I think. Never been used since it was turned. Still in a bag and just collecting dust. I'll sell it for a decent price plus shipping. Its in billings mt. Rob

[blykins]

Were you changing the stroke and he offset it incorrectly?

No sir, just going to BBC journals.  It happens but it would have been nice if he had stopped when he saw that so I could have cut my losses.  It was sent to me ready to roll.

[GerryP]

It looks like it has nice radii.  But for that one funky hole.  Why not weld the crank?  Too much investment?

[pbf777]

      I don't think it's fair to blame the crankshaft grinder here, assuming that the grinding operation was not out of index, but rather solely the result the journal diameter reduction for the 2.200" diameter; adding stroke in the process changes the outcome some, but this observance is due to where Ford Motor Co. placed the oil drilling.  The only appropriate statement would be oh-well, it-is-what-it-is!

      And not intending to make excuses for the operator, but generally one grinds the mains first, then the rod journals, and perhaps this was a latter position in the grinding operation, and even when in the grinding process sometimes visibility is not so good until stopped at which point, well it-is-what-it-is; and hopefully the person contracting for the nonstandard operation is aware of the possible shortcomings of the modification, and that person must decide the usability of their creation, not the contracted machine operator, although that person may be willing to supply previous observations and opinions, particularly if inquired upon, it's not fair to make this result that persons' fault.

      But yes, with the proximity of this oil hole breaching the surface so near the journal radius, it would not be considered "ideal".         

      Scott.

     

[gt350hr]

It looks like it has nice radii.  But for that one funky hole.  Why not weld the crank?  Too much investment?

      Worthless to weld. The weld will actually cause it to break sooner by the stress cracks from the welding process.