Are SB and BB flywheels the same?

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Dec 18, 2004 | 06:49 PM

Corey_68

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Are SB and BB flywheels the same?

I know they have the same bolt pattern but are the the same part # and can a SB flywheel work on a 454?

Dec 18, 2004 | 07:17 PM

Gordonm

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The 454 is externally balanced so it would only work with a 400. If the 454 is internally balanced it will work.

Dec 18, 2004 | 07:22 PM

Jughead

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St. Jude Donor '09

I think there's and adapter balance plate you can use when using a SB flywheel in a BB crank. Northernautoparts.com had one. And Competition Products lists it as P/N 4163, I couldn't find it online though.

Quote:

Eliminates the need for expensive internal balancing of externally balanced motors.

I just bought a new flywheel for $109.
http://www.northernautoparts.com/Pro...ctModelId=2532

Last edited by Jughead; Dec 18, 2004 at 07:27 PM.

Dec 19, 2004 | 01:02 AM

joe73vette

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400 sb and 454 bb are both externally balanced, but not the same. I think a 427 can use a 350 flywheel. Joe

Dec 19, 2004 | 01:08 AM

Solid LT1

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Quote:

Originally Posted by joe73vette

400 sb and 454 bb are both externally balanced, but not the same. I think a 427 can use a 350 flywheel. Joe

Give the man a "CEGAR" he is right along with the 327, 307, 302 and 283. I use the L-88 (427) 14lb nodular iron flywheel on my LT-1 350 (revs up like a Singer sewing machine!)

Dec 19, 2004 | 01:28 AM

Sigforty

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Quote:

Originally Posted by Corey_68

I know they have the same bolt pattern but are the the same part # and can a SB flywheel work on a 454?

Corey the SB and BB are normally different it depends on whether the motor is Internally or Externally balanced. A SB 350 tends to be internally balanced which means its flywheel will not work for a 454 but a 427 which is internally balance can use the same flywheel as a 350.

Mark B.