427 crank ?

[COPO_Anders]

Is it possible to identify the crank I bought together with a #512 block, just by these numbers ?
First pic: 71..

[COPO_Anders]

Second pic: ..37 GMT

[nuch_ss396]

Anders,

That's a '7115 ( L-88 -or- ZL-1 ) crankshaft. I have one
just like it. Nice prize if it's std./std. http://www.yenko.net/ubbthreads/images/graemlins/burnout.gif
Steve

[nuch_ss396]

Anders,

One more thought. If that crank belongs to the '512 block
it came out of, well then you know what you may have. http://www.yenko.net/ubbthreads/images/graemlins/beers.gif

Is there a code on the stamping pad?

Steve

[COPO_Anders]

They didn´t make any L-88´s using the #512 biock, did they ?
The block was cast in November 1969. And it has been decked so there are no codes anywhere.
Are there more things on that crank that would identify it as a #7115 ?

[COPO_Anders]

I just compared this crank with a 6223 I have in a shortblock, and the counterweights are the same size. The third one from the front is 3/4" (slightly less than 20 mm) on both cranks. Don´t know about the 6223, but the 7115 is crossdrilled. It has an X on the foremost counterweight that looks like it was made at the factory. The X is very deep into the crank.

Still think it´s an L-88/ZL-1 crank ?

http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

[nuch_ss396]

Anders,

I have '6223 cranks with the '6223 and 3856223 part designations.
I have '7115 cranks with the '7115 and '71 part designations.

Honestly, the width of the counterweights on your '7115 crank has me confused http://www.yenko.net/ubbthreads/images/graemlins/hmmm.gif

You may wish to expand this thread over on the NCRS.ORG site
as those guys can tell you for sure. Please keep us posted
in you learn more.

Steve

[Kim_Howie]

Alan Colvin's book on page 81 explains that the 3rd counter weight in the 427 is bigger than the 396 because of the weight of piston. he states the 396 is 7/16" and 427 is 7/8". http://www.yenko.net/ubbthreads/images/graemlins/flag.gif

[COPO_Anders]

So they must have made `7115 cranks for 396 engines then ?

http://www.yenko.net/ubbthreads/images/graemlins/confused.gif

[Kim_Howie]

6223 is the 396 crank and the 7115 is the 427 crank.

[COPO_Anders]

He states that the 396 crank is 3/4" and the 427 is 7/8".
And my crossdrilled 7115 crank is 3/4" without a doubt. Just like the 6223 I have.

[Kim_Howie]

I have never checked them. I don't know from personal experance. Kim http://www.yenko.net/ubbthreads/images/graemlins/beers.gif

[Kim_Howie]

What's the #s on a 454 crank??

[427king]

454 steel cranks are #7415 , #7416, and #3521 ..There are a few more #s that are considered other casting #s for 454 steel but ive never seen one of them.

[nuch_ss396]

[ QUOTE ]
6223 is the 396 crank and the 7115 is the 427 crank.

[/ QUOTE ]

Kim,

Not exactly. I know for a fact that many, if not all, of the L/71 engines
used the '6223 crankshaft. I'd bet that the L/72's did as well.
L/71's, L/72's, and L/78's all shared a very similar,
if not exact piston dome.

I believe that the '7115 crankshaft ( aside from the actual
inherant strength ) has beefier counterweights because the
L-88 & ZL-1 pistons had monster domes.

I've never heard of a '7115 crank being factory installed
in anything but the badest of the bad. http://www.yenko.net/ubbthreads/images/graemlins/burnout.gif Unless I'm
wrong, that = L-88 & ZL-1 http://www.yenko.net/ubbthreads/images/graemlins/drool.gif

[Kim_Howie]

That could be true Colven doesn't say what 427. I never thought about the L-88 & zl-1 only . http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif http://www.yenko.net/ubbthreads/images/graemlins/flag.gif

[Kim_Howie]

Crap, I think your right!!!! http://www.yenko.net/ubbthreads/images/graemlins/worship.gif http://www.yenko.net/ubbthreads/images/graemlins/beers.gif