FLEX PLATE - Team Camaro Tech
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post #1 of 4 (permalink) Old Apr 18th, 01, 09:24 AM Thread Starter
 
Join Date: Jan 2001
Location: griffith indiana usa
Posts: 9
Question

I just purchased a new zz4 short block and i would like to no if it is internal or externaly balanced the block has a one peice oil seal so i guess it would be 1986 and newer
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post #2 of 4 (permalink) Old Apr 18th, 01, 11:21 AM
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Location: Monroe, WA, USA
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all SB except the 400 and a 383 are internaly balanced. the 383 is not a prodution GM SB. it is a bored and stroked 350 useing a 400 crank.

some 383's are internaly balnced, it depend's on the crank.

all 400's are that have a OEM type crank in them are externaly balanced. they make an after market internaly balnced crank for the 400 too.
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post #3 of 4 (permalink) Old Apr 18th, 01, 11:26 AM
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Well I have the ZZ4 block and the one piece crank and the flex plate has a balance on it due to it not having the flange that the early cranks have.

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post #4 of 4 (permalink) Old Apr 18th, 01, 01:36 PM
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that is true, that is too keep the crank balanced, but it is still called an internaly balanced motor. you do not have a extra weight on the harmonic balancer, and the weight you have on the flex plate has less weight then the one on a SB 400.

it is there to make up for the smaller end flange. the larger end flange is part of the balance weight on a old style SB crank.

[This message has been edited by ilbl8 (edited 04-18-2001).]
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