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www.ColoradoClassicBroncos.com - View topic - 28oz or 50oz Flywheel
It is currently Sun Nov 24, 2024 4:03 pm



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 28oz or 50oz Flywheel 
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Joined: Mon Jan 27, 2020 3:31 pm
Posts: 36
Location: Denver, CO
Post 28oz or 50oz Flywheel
I picked up a used 302 and am going to replace the clutch and flywheel before I put it in. I can't tell if the flywheel is a 28oz or 50oz? Anybody have any suggestions based off the pic? The engine block is a E0AE D3C, but I think it may have been rebuilt. Any help is greatly appreciated.


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Mon Sep 21, 2020 7:35 pm
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Location: Denver, CO
Post Re: 28oz or 50oz Flywheel
Or should I just get this one resurfaced and not bother buying a new one?


Mon Sep 21, 2020 8:05 pm
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Post Re: 28oz or 50oz Flywheel
E0 is 1980
1968-80 302 engines were built with a 28-ounce imbalance factor. 1981-2001 302 engines were built with a 50-ounce imbalance factor.

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1968 3.5" Lift on 31's Front serpentine belt ViperBuilt 4x4x2 PS C4 '66 Speedo '66 Horn Button- STROPPE goodies: Steering Wheel, Roll Bar, Cactus Smasher
SOLD :(1972 Explorer Sport - '66 Eyebrow Grill - '66 Speedometer - Stroppe Steering Wheel - Stroppe RollBar - ViperBuilt C4


Mon Sep 21, 2020 9:48 pm
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Location: Falcon, CO
Post Re: 28oz or 50oz Flywheel
If your not sure I would see what you can find online with the casting number for the block, E0 is 1980 which is around the time the 302/5.0 changed from 28oz to 50 oz imbalance. The casting number on the flywheel E8TR-AA is a 1988 casting number which if it was from a 302 would be the 50oz imbalance, however if it was from a 351W it would be a 28oz imbalance. I would try and find as much info as I can on those casting numbers or just have it resurfaced. I am sure someone else will chime in.

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1969 Bronco: Full widths, 3 linked front end, 37's, hydro-boost, 4x4x2 box, ZF5, Atlas t-case, and fuel injected 302


Mon Sep 21, 2020 9:54 pm
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Post Re: 28oz or 50oz Flywheel
What does resurfacing do for you? A general question, not specific to this post?


Tue Sep 22, 2020 7:34 am
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Post Re: 28oz or 50oz Flywheel

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Tue Sep 22, 2020 9:32 am
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Post Re: 28oz or 50oz Flywheel
And you can probably get the ring gear replaced by the machinist.

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Tue Sep 22, 2020 10:53 am
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Post Re: 28oz or 50oz Flywheel
I vote for resurface and starter gear as mentioned.

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Wed Sep 23, 2020 2:32 pm
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Post Re: 28oz or 50oz Flywheel
I went the safe route and just got the flywheel resurfaced...


Wed Sep 23, 2020 7:35 pm
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