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28 oz vs 50 oz Flywheel and Balancer 351W

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Bruno2
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28 oz vs 50 oz Flywheel and Balancer 351W

Bruno2
I was wondering how a person determines if they need the 28 oz balancer or the 50?

I am about 90% sure I need the 28 oz, but would like some confirmation before I continue the build. The reason why I am thinking 28 oz is because all of the parts I have laying around from different 351 W's seem to have the 28 oz weights on them. I believe one of the flywheels is from the 82 I am building, another is from my 87 Bronco and one is an aftermarket I got from Gary. All of them are 28 oz.

Any opinions or thoughts?
Whitey: 1996 F 250 XL CCLB 4X4 7.3 DI ZF5 (The Work Horse) Lots of power mods
Whitey Jr: AKA Jr 1982 F 150 CCLB 4X4 351W C6 (Jr Work Horse) respectable power, but not over the top
The Bronco: 1987 Bronco XLT 351W C6 (needs work) Lots of off road mods and plenty of power mods
The Dodge: 2006 Ram 2500 CCSB 4X4 5.9 HO Cummins (The reliable ride that cant keep an AC in itself) (5th AC go around almost complete)
85lebaront2
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Re: 28 oz vs 50 oz Flywheel and Balancer 351W

85lebaront2
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Brandon, I don't have a good answer on that, maybe the parts fiches Gary has or the 1980-89 parts CD might help, If you are building a "killer" 351W anyway I am sure it will be balanced anyway. The machine shop probably has a list of which crank casting numbers take which external weight.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

Gary Lewis
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Re: 28 oz vs 50 oz Flywheel and Balancer 351W

Gary Lewis
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Ill check the catalog, but I don’t think it shows anything about the weight. Anyway, I will look.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Ken Blythen
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Re: 28 oz vs 50 oz Flywheel and Balancer 351W

Ken Blythen
351w engines were all 28oz. Only 302's changed from 28 to 50 (1981/2)
Bruno2
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Re: 28 oz vs 50 oz Flywheel and Balancer 351W

Bruno2
That makes sense Ken. I noticed the aftermarket parts companies only listed 50 oz for 302 motors.So I think I am good with my 28oz stuff.
Whitey: 1996 F 250 XL CCLB 4X4 7.3 DI ZF5 (The Work Horse) Lots of power mods
Whitey Jr: AKA Jr 1982 F 150 CCLB 4X4 351W C6 (Jr Work Horse) respectable power, but not over the top
The Bronco: 1987 Bronco XLT 351W C6 (needs work) Lots of off road mods and plenty of power mods
The Dodge: 2006 Ram 2500 CCSB 4X4 5.9 HO Cummins (The reliable ride that cant keep an AC in itself) (5th AC go around almost complete)
PetesPonies
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Re: 28 oz vs 50 oz Flywheel and Balancer 351W

PetesPonies
In reply to this post by Ken Blythen
Yep very easy . . no 50 OZ 351s.
Pete's Ponies
Mustang RUSToration & Performance

1982 F100 Flareside
1983 Bronco

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