Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#441400 04/18/20 04:51 AM
Joined: Apr 2020
Posts: 3
Grease Monkey
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Grease Monkey
Joined: Apr 2020
Posts: 3
Hello everyone!

I' m restoring a Fleetline 48. Difficult project because the car is (was) very damaged.

Car with 6 cil 216 motor, uses CARTER W1 carburetor.
I have found, a NOS Carter YF (model 787SB) in very good condition.

Can I change it? Will it runs better?

Thank you for your help.
Regards

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Joined: Feb 2004
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Backyard Mechanic
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Backyard Mechanic
Joined: Feb 2004
Posts: 424
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The YF technically is a very slightly more advanced carburetor.

If you scale quality on a scale of 1 (awful) to 100 (wonderful), my grades would be: 1939-up W-1 - 90, YF 787 - 91.

The YF may give slightly better fuel economy in city (stop and go) driving.

The big disadvantage to the YF is the neopreme diaphragm accelerator pump. On a daily driver, not an issue. On a collector vehicle driven occasionally IF the owner must use ethanol contaminated fuel, the neopreme pump will harden if allowed to dry out, and fail. This would require rebuilding the carb more often. Not an issue if the owner uses real gasoline, or if the vehicle is started daily.

As the W-1 has a leather accelerator pump which is totally impervious to alcohol, the W-1 is a better choice if the owner has to use ethanol contaminated fuel.

Jon.


Good carburetion is fuelish hot air

Owner, The Carburetor Shop (in Missouri)
Joined: Sep 2009
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ChatMaster - 6,000
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ChatMaster - 6,000
Joined: Sep 2009
Posts: 6,689
Likes: 21
Jon,

I don't think the term "contaminated" fuel is quite accurately used here. Ethanol may be used in gasoline but it sure doesn't contaminate it. It is what it is.

Why not merely say that some carburetors don't perform as well, over time, with gasoline containing ethanol? And then state why.

Just a thought for fair play.

Best,

Charliecomputer

BTW: I surely don't doubt your expert knowledge in carburetor stuff here but merely the word "contaminated" as used in your instant post.




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