Which BB flywheel do I need??
Thread Starter
Senior Member since 1492
Joined: Aug 2000
Posts: 87,922
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Which BB flywheel do I need??
Well, Im resigned to getting a new flywheel in order to balance my rotating assembly. I bought the 454 with a flexplate attached so a new flywheel was in order anyway. My question is which flywheel do I need? Here's one from Jegs for $175:
J.W. Performance ''The Wheel'' Flexplate
Product images may differ from actual product appearance.
Approximately 4lbs. heavier than a stock flexplate which creates inertia force. The inertia force is designed to provide quick launches, lower reaction times, improved 60 foot times and more constant engine RPM's during shifts. This quality flexplate that will last 5 years. SFI-certified and NHRA-accepted. Choose lightweight (5.5lbs.) or standard (7.5lbs.). The 4130 chromemoly 0.190'' thick center is welded to the ring gear.
And then there's the correct 454 ext balanced flywheel from GM:
3993827 - Flywheel (454ci) 1970-90 $165.74
This counterweighted 14" diameter flywheel for manual transmission applications provides the correct engine balance for externally balanced 454ci big-blocks. It is drilled for an 11" diameter clutch. Flywheel ID #3993457.
Technical Notes: Do not use with internally balanced engines. Use with counterweighted balancer P/N 3963530. 168 tooth starter ring gear. For use with Mark IV engine only.
And then I read on the forum here about an aluminum flywheel???
I'm using a stock cast crank and stock 8in 454 balancer. These two flywheels are about the same price. Will either make a difference.
The tranny is a Muncie M-20.
Thanks
Len
J.W. Performance ''The Wheel'' Flexplate
Product images may differ from actual product appearance.
Approximately 4lbs. heavier than a stock flexplate which creates inertia force. The inertia force is designed to provide quick launches, lower reaction times, improved 60 foot times and more constant engine RPM's during shifts. This quality flexplate that will last 5 years. SFI-certified and NHRA-accepted. Choose lightweight (5.5lbs.) or standard (7.5lbs.). The 4130 chromemoly 0.190'' thick center is welded to the ring gear.
And then there's the correct 454 ext balanced flywheel from GM:
3993827 - Flywheel (454ci) 1970-90 $165.74
This counterweighted 14" diameter flywheel for manual transmission applications provides the correct engine balance for externally balanced 454ci big-blocks. It is drilled for an 11" diameter clutch. Flywheel ID #3993457.
Technical Notes: Do not use with internally balanced engines. Use with counterweighted balancer P/N 3963530. 168 tooth starter ring gear. For use with Mark IV engine only.
And then I read on the forum here about an aluminum flywheel???
I'm using a stock cast crank and stock 8in 454 balancer. These two flywheels are about the same price. Will either make a difference.
The tranny is a Muncie M-20.
Thanks
Len
Pro
Joined: Feb 1999
Posts: 735
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From: Portland, OR.
Re: Which BB flywheel do I need?? (1970 Stingray)
An aluminum flywheel!? That would be odd.
I would steer clear of the one with 4 pounds added to it, unless you really want to make your tire store happy. It will cause more clutch slippage also. I would go for the GM.
Good luck.
STW!
Linwood
I would steer clear of the one with 4 pounds added to it, unless you really want to make your tire store happy. It will cause more clutch slippage also. I would go for the GM.
Good luck.
STW!
Linwood
Thread Starter
Senior Member since 1492
Joined: Aug 2000
Posts: 87,922
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: Which BB flywheel do I need?? (73454)
OOpppss. Sorry, I just noticed the first Jegs listing is actually a flexplate. I had the wrong vendor & item number. :bb :crazy:
Drifting
Joined: Jul 2001
Posts: 1,418
Likes: 1
Re: Which BB flywheel do I need?? (1970 Stingray)
Len,
I would use the 350 /427 flywheel and the 12.00 balancing plate. The flywheel is lighter,cheaper
Nothern Auto parts has them them for $94.99
[Modified by mountainmotor, 6:37 PM 7/9/2002]
I would use the 350 /427 flywheel and the 12.00 balancing plate. The flywheel is lighter,cheaper
Nothern Auto parts has them them for $94.99
[Modified by mountainmotor, 6:37 PM 7/9/2002]
Thread Starter
Senior Member since 1492
Joined: Aug 2000
Posts: 87,922
Likes: 156
From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: Which BB flywheel do I need?? (mountainmotor)
Thanks for the lead Curtis. I saw that they have a replacement for the GM flywheel above:
http://www.northernautoparts.com/Pro...ctModelId=2532
Standard Transmission Flywheels - Flywheel
Chevy 454 1970-90, Replaces OE#3993827, 168 Teeth, Pitch 12-14, OD 14.13", External Balance, Clutch size 11" or 12"
Category: Flywheels, Flexplates & Ring Gears
Manufacturer: Autocraft Manfacturing
Model Number: GS9202
Price: $109.99
I'm so stupid :yesnod: Haste makes waste and I'm always in a hurry.
[Modified by 1970 Stingray, 9:05 PM 7/9/2002]
http://www.northernautoparts.com/Pro...ctModelId=2532
Standard Transmission Flywheels - Flywheel
Chevy 454 1970-90, Replaces OE#3993827, 168 Teeth, Pitch 12-14, OD 14.13", External Balance, Clutch size 11" or 12"
Category: Flywheels, Flexplates & Ring Gears
Manufacturer: Autocraft Manfacturing
Model Number: GS9202
Price: $109.99
I'm so stupid :yesnod: Haste makes waste and I'm always in a hurry.
[Modified by 1970 Stingray, 9:05 PM 7/9/2002]
