Damaged crank flange

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BTW, Pishta, what are you doing about overall balance here? You are putting 318 pistons and later heavy rods in there? The bobweight is not going to be quite the same as for the 360LA piston setup... maybe 15-20 grams off. Just run it?
No idea, id have to weigh the pistons to the rods and then figure what a 360 bobweight is. If its a 360 crank , itll take a 360 bobweight. You think it would be as easy as weight matching the 318 truck pistons to some stocker 360 dish pistons? I got the bigger rods already and a set of heavy 273-2 pins. If my 273 was still apart, Id chuck it in there with 273-2's and see where the pistons end up at above the deck. Well see how the crank comes out tomorrow.
 
You're using a hodge-podge of parts so it's going to need to get balanced. Do that, then run 5 bolts and run it.
 
OMG! Have it pinned in place, then welded by a competent welder. The pins will help keep the piece in place. It will be stronger than it ever was before and if someone does the repair that REALLY knows what they're doing, you can simply run a tap through the hole, clean up the threads and go.

My GAWD. You'd think nobody on here knows a FRIKKIN thing about how to weld cast iron. Stop wastin your time here, where nobody knows a FUKKIN thing and take it to a good welding shop.


On page one a professional welder gave his input. There's no value to having it welded.
 
No idea, id have to weigh the pistons to the rods and then figure what a 360 bobweight is. If its a 360 crank , itll take a 360 bobweight. You think it would be as easy as weight matching the 318 truck pistons to some stocker 360 dish pistons? I got the bigger rods already and a set of heavy 273-2 pins. If my 273 was still apart, Id chuck it in there with 273-2's and see where the pistons end up at above the deck. Well see how the crank comes out tomorrow.
Well, if you are using the heavy rods like were used in all the 360 LA's, then weight matching the 318 and 360 rings, pins, and pistons will get you as close as a factory balance. My data shows the 318 pistons+pin+rings being about 16 grams more than the shorter 360 pistons (798 grams total vs 782 grams total), so it ought to work fine just taking some weight off.

15 grams off a piston can be some work unless you mill the dome, in which case it comes off fast, so some might have to come from the pins, or you can take it off the small ends of the rods too (though that would change the rods forever). If you shorten the pins, then I'd make sure that you still have at least .6" of weight bearing length in each pin boss.
 
Sorry fellas. I just like fixin stuff so it's good again. I didn't mean to get carried away. My bad.
 
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