Cast or forged crank?

[highspeeddirt]

My 1967 273. I know they are typically forged cranks from what I read. Also, looks like wide forge marks. It Has the "ring" to it also. Just wanted to get some of y'all's expert opinions?

 

[toolmanmike]

Forged until about 72. Note the wide parting line on the crank throws.

 

[RustyRatRod]

Yup. Forged all day long.

 

[Dan the man]

Yup. Forged all day long.[/QUOTE Forged crankshaft would be awesome for a 318 build

 

[toolmanmike]

And totally unnecessary really. Mopar cast cranks can easily support 400 horse or more.

 

[Dan the man]

And totally unnecessary really. Mopar cast cranks can easily support 400 horse or more.

True, but would be a awesome addition to a 318 build since he already has it

 

[toolmanmike]

True, but would be a awesome addition to a 318 build since he already has it

Depending on what year teen, it may have a forged crank already.

 

[Dan the man]

Depending on what year teen, it may have a forged crank already.

What year's did the teen have a forged crankshaft? I knew that they had floating wrists pins

 

[highspeeddirt]

Thanks everyone. I was pretty confident it was forged. As of right now, my plans are to build the 273 using the 10.5:1 pistons from Egge.

 

[Ironracer]

Thanks everyone. I was pretty confident it was forged. As of right now, my plans are to build the 273 using the 10.5:1 pistons from Egge.

That's gonna be a Lil ripper.... heheheh

 

[toolmanmike]

Thanks everyone. I was pretty confident it was forged. As of right now, my plans are to build the 273 using the 10.5:1 pistons from Egge.

Check out my 273 build. Link is just below.

 

[highspeeddirt]

Check out my 273 build. Link is just below.

I kinda stalked your build a while back. Enjoyed watching your progress.
With the "no small bore head gasket availability issue" for the 273's, I sent an inquiry in to cometic about custom head gaskets. May be too pricey, but would be nice to try and keep as much compression as possible.

 

[toolmanmike]

I kinda stalked your build a while back. Enjoyed watching your progress.
With the "no small bore head gasket availability issue" for the 273's, I sent an inquiry in to cometic about custom head gaskets. May be too pricey, but would be nice to try and keep as much compression as possible.

Worth a try but it won't be enough to make a difference. Even with milling the heads, I ended up with 9.6/1. Perfect for today's gas.

 

[Krooser]

Geez….it’s agreed it’s a “forgery”…..

 

[Brooks James]

My friend who is a NHRA racer, regularly spun his. 318 cast crank to Over 7000

 

[AJ/FormS]

Same with my 360. 7000 at least a couple of times every time out

 

[pishta]

rounded counterweight edges is a dead giveaway from 50 feet. High rpms has much to do with a good balance job and quaillty rod bolts.

 

[highspeeddirt]

Worth a try but it won't be enough to make a difference. Even with milling the heads, I ended up with 9.6/1. Perfect for today's gas.

Well, Cometic replied..... They said they can do a fiber/fire ring gasket for the 3.625" bore, but they can't do a MLS gasket.. Also said stock thickness is .040" I'm trying to find out what is the smallest compressed thickness they can do. They are pricey, $93.07 each!

UPDATE: they replied that .027" is the thinnest they go for automotive head gaskets.

 

[pishta]

Are there red head gaskets that are .020? Old stock...thought I remembered them. How about .020 dead soft copper and some silver gasket paint?

 

[cudamark]

What year's did the teen have a forged crankshaft? I knew that they had floating wrists pins

All poly 318's have forged cranks. So do many LA318's. There doesn't seem to be any firm rules about them though. I found the forged ones mostly in '67 LA318's, and manual transmission applications in the later years....even late '70's trucks and vans. Most cars and pickups with automatics came with cast cranks.