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Author Topic:   New to a 383. Please help
Dirt Full Roller

Total posts: 60
posted February 14, 2005 09:03 PM  
I've ran a 355 the last two years in my hobby stock and I am currently building a 383 to replace it with. It is externally balanced. Can i use the lightweight 350 flywheel/clutch/pressure plate setup on this 383 that i've been using on my 355?? Sorry to be dumb but my 355 is all i have ran. Any help is appreciated.

Dirt Freak

Total posts: 466
posted February 14, 2005 09:48 PM  
Yes you can you just have to buy a balance plate that bolts on the crank with the flywheel.

Dirt Freak

Total posts: 385
posted February 15, 2005 07:20 AM  
Or get an internally balanced 383 setup - the common internal balance setup is an aftermarket crank for 6" rods and the matching 6" rods / lightweight pistons.

Whatever way you go take it to a machine shop and have the rotating assembly balanced with the matching parts if it's external...

Dirt Maniac

Total posts: 170
posted February 15, 2005 03:12 PM  
what is an average cost to do that?

and can it be done to 400's also?

i assume so...

Dirt Freak

Total posts: 370
posted February 15, 2005 06:01 PM  
Balance plate $12.95 from Midwest Motorsports. # FMP 416002. That is for the 2 pc rear main seal. If it is a crate motor it should be already balanced and assembled right. I wouldnt pull it apart til next year when you go to freshen it up pull it apart take the crank and get it balanced without the balance plate. That should be balanced to stock specs and the balance plate will work fine. OR if your real worried pull it apart and balance it or dont spin it real high. Make sure you use a 400 balancer.

Dirt Forum Champ
Total posts: 578
posted February 15, 2005 07:28 PM  
internal balance is the way to go. if you even break or replace the balancer plate or harmonic balancer you will need to rebalance the assembly. with an internal balance motor you dont hafta worry about that. plus no potential claimers will be able to tell your running a 383.


Dirt Maniac

Total posts: 170
posted February 15, 2005 08:49 PM  
yes i agree.. again, what is the average price to have that done?!

Dirt Freak

Total posts: 300
posted February 16, 2005 08:10 AM  
Normal basic balance with no heavy metal typically runs anywhere from $100-230.00. If you require heavy metal in the crank to internal balance it, the slugs can run $50-75 a piece and that adds up pretty quick.

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