using 350 damper on a 383 ???
Thread Starter
Racer
Joined: Apr 2002
Posts: 415
Likes: 0
From: loughborough Leics ENGLAND
using 350 damper on a 383 ???
I seem to remember seeing a post about using an aftermarket 350 cu in fluid damper on a 383 with success to fit a 383 in a C4 frame without having to do any mods :confused: but i cannot find a link.
Has anyone got any info about this, i have been offered a zz4 based 383 short motor but it is externally balanced so as i do not intend to do anything with my frame and i don't want to use the bigger damper i would have to get it internally balanced if this is not possible. why ?? because i don't want anyone to know its a 383 ;)
:cheers:
Has anyone got any info about this, i have been offered a zz4 based 383 short motor but it is externally balanced so as i do not intend to do anything with my frame and i don't want to use the bigger damper i would have to get it internally balanced if this is not possible. why ?? because i don't want anyone to know its a 383 ;)
:cheers:
Melting Slicks
Joined: Apr 2002
Posts: 3,019
Likes: 0
From: down that one road next to that big tree
Re: using 350 damper on a 383 ??? (BLUE ONE)
my friend rich straped a street damper on a zz4 with great success. the 6&3/4" will bolt right on.
lingenfelter actually uses stock GM 6-3/4" dampers on it's 383's, however those engines are internally balanced and assembled very well.
lingenfelter actually uses stock GM 6-3/4" dampers on it's 383's, however those engines are internally balanced and assembled very well.
Le Mans Master
Joined: Nov 2002
Posts: 7,080
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From: Corvette valley Georgia
St. Jude Donor '06
Re: using 350 damper on a 383 ??? (BLUE ONE)
If you have the money any thing is possible, but why fight it! I would go with the externally balenced ( 400) damper And dont let them look under the hood! :smash:
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
Re: using 350 damper on a 383 ??? (BLUE ONE)
Sorry but you can't use a 350 dampner on an externaly ballenced engine. You will need a dampner for a 400ci. as far as being able to see the difference the weight is inbetween the engine and tranny. You couldn't see it anyway. Summit racing has a great deal on a 400 dampner that is almost the same size as a 350 dampner. As far as fitting if a 350 can be bolted into a car then a 383 can without any cutting.
Hope this helps
Hope this helps
Race Director
Joined: Jul 2001
Posts: 14,604
Likes: 3
From: Glendale, AZ
Re: using 350 damper on a 383 ??? (gtsyellow)
my friend rich straped a street damper on a zz4 with great success. the 6&3/4" will bolt right on.
lingenfelter actually uses stock GM 6-3/4" dampers on it's 383's, however those engines are internally balanced and assembled very well.
lingenfelter actually uses stock GM 6-3/4" dampers on it's 383's, however those engines are internally balanced and assembled very well.
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
Re: using 350 damper on a 383 ??? (85_togo)
How are you building a internaly ballenced 383? Is it an LT1? I don't know a lot about LT1s but with anything else I can tell you that a 383 crank is externaly ballanced and you will need a dampner for a 400 cid.
Melting Slicks
Joined: Apr 2002
Posts: 3,019
Likes: 0
From: down that one road next to that big tree
Re: using 350 damper on a 383 ??? (Phobos84)
you can easily make a internal balance 383
check out scat's 9000 series 383 shafts, many of these are made to be internal balance & use a 1pc rear with 350 damper
http://www.scatcrankshafts.com/serie...tcranks02.html
a new gm damper is under $60, don't be cheap, buy a new one. you know your going to spend thousands on the engine, $60 won't kill ya :thumbs:
check out scat's 9000 series 383 shafts, many of these are made to be internal balance & use a 1pc rear with 350 damper
http://www.scatcrankshafts.com/serie...tcranks02.html
a new gm damper is under $60, don't be cheap, buy a new one. you know your going to spend thousands on the engine, $60 won't kill ya :thumbs:
Race Director
Joined: Jul 2001
Posts: 14,604
Likes: 3
From: Glendale, AZ
Re: using 350 damper on a 383 ??? (Phobos84)
How are you building a internaly ballenced 383? Is it an LT1? I don't know a lot about LT1s but with anything else I can tell you that a 383 crank is externaly ballanced and you will need a dampner for a 400 cid.
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Burning Brakes
Joined: Dec 2000
Posts: 1,023
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From: Marietta, South Carolina, USA
Re: using 350 damper on a 383 ??? (BLUE ONE)
Most all 383 internaly balanced cranks are for 6 inc rods because the counter weights have to weigh more then a crank that is externaly balanced you can get a 3.75 crank for a 5.7 rods balanced to be internaly balanced but you have to put a lot of mallory in the counter weights and that will cost you, it will cost you $250-$400 to have it done.
Jay
[Modified by MrJay, 4:23 PM 1/3/2003]
Jay
[Modified by MrJay, 4:23 PM 1/3/2003]
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
Re: using 350 damper on a 383 ??? (MrJay)
I guess you learn something new everyday. I have never heard of that before. But my question is why? By the sounds of it the internal ballance 383 would cost a lot more and would not give any benifit over external except you get to use a 350 dampner, and like you said they are only $60.
