WELDED CRANKSHAFT
#1
Senior Member
RACING JUNKIE
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Join Date: Sep 2007
Posts: 4,137
WELDED CRANKSHAFT
Would you guys be afraid to use a crank that had been welded up and offset ground? I am not talking about a race car..just a street car that will never see the dragstrip. The reason I ask is I have a GM steel BBC crank that was offset ground to build a 496. I got the engine free from my Uncle.It was in a dirt track car many years ago. It is std std but has one journal that is chewed up and will need repaired..Just trying to decide whether to keep it or not. The block is a 4 bolt 454 block. I was considering having the thing fixed and putting a BB together for my Chevelle I'm building right now . I have enough parts sitting around to do it cheap if the crank is usable. I know nobody welds stroker cranks anymore since there are cheap aftermarket cranks but this one was free and I already have it..Only other bad thing is it's cross drilled, but like I said the car will never be raced I just want a BB in it because it looks cool.
#5
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Location: Belleville, IL
Posts: 658
I've got a GM 5140, 454 crank if you need one cheap. It's .030/.030.
Uses the internal balance flexplate (has a weight welded on the rear flange), but standard external balancer.
Double keyed for a blower.
It was .010/.010, but I had it sitting under a shelf that had a 1 gallon container of car wash concentrate above it. The container cracked and leaked all of that shit all down the crank.
Chaffed my ass having to take .020 off of a perfectly good crank due to surface rust.
Still has a few minor pits, but nothing that's going to hurt anything. It's freshly turned, well oiled, and sitting in my basement next to the dehumidifier. Been sitting here for about 18 months now, and still looks like it did the day I picked it up from the machine shop.
Uses the internal balance flexplate (has a weight welded on the rear flange), but standard external balancer.
Double keyed for a blower.
It was .010/.010, but I had it sitting under a shelf that had a 1 gallon container of car wash concentrate above it. The container cracked and leaked all of that shit all down the crank.
Chaffed my ass having to take .020 off of a perfectly good crank due to surface rust.
Still has a few minor pits, but nothing that's going to hurt anything. It's freshly turned, well oiled, and sitting in my basement next to the dehumidifier. Been sitting here for about 18 months now, and still looks like it did the day I picked it up from the machine shop.
#7
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RACING JUNKIE
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Originally Posted by CamBirdRacing
I think 5130 is the best one GM makes. Don't think they make any 4130.
http://viewer.zmags.com/publication/...#/0ede9029/260
Page 258, p/n 3963524
And yes, GM makes 4340 cranks, same page in the catalog.
Where in the world did you get your steel numbers from? Neither one match any materials I've seen used in a crank.
#8
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RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Over 40 yrs ago i had a blown gas sm/blk, i had a delta welded 350 steel crank to a 3 5/8" stroke (365"s) i put 200/300 passes on the 671 blown Hilborn inj. engine, ran low 10.'s @ over 140mph ran the car from 1964 to 1970. Never an issue with the crank, it was welded and hard cromed. Went thru 3 blks, even ran the same set of alum rods. Car weighed 2450lbs per class rule Amod/sports and B/GS. Pretty good for the day and times of yesteryear.
Zip.
Zip.
#9
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Join Date: Feb 2009
Posts: 510
Originally Posted by OneBadGMC
Originally Posted by CamBirdRacing
I think 5130 is the best one GM makes. Don't think they make any 4130.
http://viewer.zmags.com/publication/...#/0ede9029/260
Page 258, p/n 3963524
And yes, GM makes 4340 cranks, same page in the catalog.
Where in the world did you get your steel numbers from? Neither one match any materials I've seen used in a crank.
Slip of the brain #'s. Didn't know GM made a 4130 crank. Last time I called all they had was the 5140. That was a loooong time ago.
#10
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Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Originally Posted by CamBirdRacing
Originally Posted by OneBadGMC
Originally Posted by CamBirdRacing
I think 5130 is the best one GM makes. Don't think they make any 4130.
http://viewer.zmags.com/publication/...#/0ede9029/260
Page 258, p/n 3963524
And yes, GM makes 4340 cranks, same page in the catalog.
Where in the world did you get your steel numbers from? Neither one match any materials I've seen used in a crank.
Slip of the brain #'s. Didn't know GM made a 4130 crank. Last time I called all they had was the 5140. That was a loooong time ago.
They make 1053, 5140, and 4340.