383 harmonic damper

[dazedduster]

I am building a 383 for my dutser, it has a cast crank and is externally balanced. I want a quality damper i was going to use a fluidamdr but they only make a internal balance model. also will i need a specialy balanced flex plate to run a 2500 internal balanced stall converter. I had to get one for my 360 but dont know if its required for my 383. any input would be gret thanks.

 

[66dartgt]

383 cast crank ? That seems odd. I thought all 383's were forged cranks. Sounds like this is a 383 with a 400 crank in it ? Or maybe its a 400 ? If you have the old balancer you could reuse it by having it rebuilt. Take a look in hemmings there are outfits that do this. The other thing to check is the parts houses, somebody probably is producing the correct part in a performance version. A 360 flex plate and or damper wont work, the snout is too long, not to mention the balance wont be right. If the motor is apart why not get a forged crank and do it "right" , with a neutral balance damper and flex plate. Make sure to have the whole mess balanced in any event.

 

[dazedduster]

they started using cast cranks after 71 i thought they were all forged too. i was not thinking of using my 360 parts on the 383 just wanted to know if i needed a specialy ballanced flex plate I.E. did the torque converter have a balance weight on it. all this came about when they were trying to balace it. need to get them the parts so they can balance it

 

[racingsnake440]

not that it's any help but i've got a cast crank 383 too and was wondering the same thing. also is there a flywheel for a manual transmission for this motor?

 

[66dartgt]

I'd call or check mancini racings web site or store, they should be able to find out for you what's available. Hope this helps.

 

[oldkimmer]

The 383 cast crank IS INTERNALLY balanced even though it is cast ,same as the 318 cast crank IS INTERNALLY balanced. U do not need any counter weighted balancer or flex plate or fly wheel. If your crank is indeed a 383 cast it is outta a 1971 383, G code for 71....as A=65,b=66 c=67,d=68,e=69 f=70.U can tell by the parting line wide flat approx 1/2 in wide=forged....narrow like a jagged1/6=cast.Hopes this help u guys out. If I can be of anymore help to u , just PM me or by e-mail.....Thanks........Kim

 

[demon seed]

If your crank is indeed cast, the part number is 3462922 and balancer part number is 3577180. Behind the distributor there is 2 inch square area of the block that will be stamped G 383 if it is a 71 383. These engines were a low performance 383, sometimes with a 2bbl carb, before they were replaced by the 400 late the same year. If you are going to soup this puppy up I would recommend forged crank, correct dampener and since there are probably thousands of these things about they can be gotten for cheap.