Guys,
I was wondering if anyone seen or have a cast crank 383? If in fact they do exist, what years? If the harmonic balancer is the same? Torque converter weighted? I know about forged being internally and cast being externally balanced. I've read so many forums and technical articles that all say something different.
383 Cast Cranks
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383 Cast Cranks
71 Runner 383
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- GTX (RS)
- Posts: 238
- Joined: Tue Apr 21, 2009 8:27 am
- My Cars: 1971 Road Runner 4speed FJ6 air grabber car. And yes i have the
build sheet to prove it. NO IT'S NOT FOR SALE! - Location: South Jersey
Re: 383 Cast Cranks
I believe all big blocks had forged cranks up to 1970. After that it depends on the motor.
http://www.moparts.org/Tech/Archive/motor/36.html
http://www.moparts.org/Tech/Archive/motor/36.html
Re: 383 Cast Cranks
The reason I'm asking is that I have a vibration when idling and when being revved up. The engine is a 70 two barrel and out of a coronet station wagon. All I did was install a mopar camshaft and a four barrel carb. I changed fan and water pump thinking that would help, but it didn't. Only thing that has me wondering is the torque converter. It's for an internally balanced(non weighted) engine. I might have to pull the oil pan off and look at the crank.
71 Runner 383
Re: 383 Cast Cranks
the cats crank was used starting in 71, on the 2 bbl motors only. In 72, the 400 was introduced, with the same cast crank, unless you had a 4 speed, those motors got forged cranks.
Re: 383 Cast Cranks
What's the harmonic balancer look like? Can you post a pic?
Re: 383 Cast Cranks
Well guys i pulled the pan and its a cast crank. I read numerous forums and other guys said they had also. If someone says they didnt use cast in 70, then they are full of it. I believe its still internally balanced since it has a normal harmonic balancer and the crank counter balancers are drilled.
71 Runner 383