Auto to manual conversion

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Jan 9, 2010 | 11:09 AM

Phil Zell

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Drifting

Joined: Nov 2003

Posts: 1,874

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From: l In

Auto to manual conversion

I currently have a TH-400 in my car and I am considering changing to a manual and my question is this.
My 383 is externally balanced, what type flywheel do I use to keep everything balanced ?

Thanks

Jan 9, 2010 | 11:14 AM

Gordonm

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Joined: Dec 1999

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From: Forked River NJ

Get one that is for an externally balanced motor. Your 400 used the larger flywheel so your starter is set for the larger 168 tooth flywheel. There are plenty of flywheels out there take your pick.

Jan 9, 2010 | 12:48 PM

Phil Zell

Thread Starter

Drifting

Joined: Nov 2003

Posts: 1,874

Likes: 7

From: l In

Quote:

Originally Posted by Gordonm

Get one that is for an externally balanced motor. Your 400 used the larger flywheel so your starter is set for the larger 168 tooth flywheel. There are plenty of flywheels out there take your pick.

Thanks Gordonm, so any external, 400, or big block flywheel will work ? This is the first externally balanced engine I have ever messed with and was a little confused.

Jan 9, 2010 | 01:40 PM

redvetracr

Race Director

Joined: Aug 1999

Posts: 18,126

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From: WI

If you or anyone else is interested I have a 168t GM flywheel casting #3973457 it`s in good condition and I believe it`s from a 454 w/2piece rear main...send a PM if interested

Jan 9, 2010 | 01:45 PM

Gordonm

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From: Forked River NJ

Quote:

Originally Posted by Phil Zell

Thanks Gordonm, so any external, 400, or big block flywheel will work ? This is the first externally balanced engine I have ever messed with and was a little confused.

The only BB that was external was the 454 so it would have to be from a 454.

Jan 9, 2010 | 04:54 PM

syro

Instructor

Joined: Dec 2004

Posts: 121

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From: sherbrooke quebec

is there any difference between a 454 two pieces and a one piece main seal flywheel ?

Jan 9, 2010 | 06:12 PM

MotorHead

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Joined: Apr 2000

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From: Who says "Nothing is impossible" ? I've been doing nothing for years.

Check the flexplate to see if anything looks like it was tacked on or drilled for balancing.

If it looks clean you can just swap in an externally balanced 400ci small block flywheel, the correct size and tooth count of course

Jan 9, 2010 | 07:45 PM

Gordonm

Race Director

Joined: Dec 1999

Posts: 19,610

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From: Forked River NJ

Quote:

Originally Posted by syro

is there any difference between a 454 two pieces and a one piece main seal flywheel ?

Yes there is. They are different.

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Jan 9, 2010 | 10:26 PM

TheSkunkWorks

Le Mans Master

Joined: Apr 2007

Posts: 7,353

Likes: 72

From: Graceland in a Not Correctly Restored Stingray

Welcome to the auto-to-manual club. This will be one of the best mods you ever make.

If interested, I've got a ...403 bellhousing available (std SB w/153 tooth flywheel).

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