[C1] WCFB float setting

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Jun 25, 2024 | 10:53 AM

vettepoor

Thread Starter

Burning Brakes

Joined: Mar 2006

Posts: 1,105

Likes: 171

From: Colorado Springs, CO

WCFB float setting

I’ve been having issues with percolation on my 57 with dual wcfb carbs. Starts and cruises fine, but stumbles when hot and in slow traffic, especially in 90* temps we’ve been having. After shutdown, gas dribbles out of the accelerator pump nozzles on both carbs for a few minutes. I have read that lowering the float levels might help. My question is, by how much? 1/8”, 3/16” or what? Should this be done on both primary and secondary floats? I do have phenolic spacers under both carbs, and I have used both 10% and non-ethanol with same results. Thanks for any recommendations.

John

Jun 25, 2024 | 10:59 AM

thoyer

Melting Slicks

Joined: Sep 2005

Posts: 2,734

Likes: 910

From: Warminster PA

Do you have the intake crossover ports blocked? I never had issues with my 60 until I had the intake off and forgot to block the crossover when I put it back on. Percolation problem became quickly apparent. I lowered the float level about 1/8 which did improve some, but pulling the manifold and blocking the crossover did the trick.

Jun 25, 2024 | 11:10 AM

vettepoor

Thread Starter

Burning Brakes

Joined: Mar 2006

Posts: 1,105

Likes: 171

From: Colorado Springs, CO

Yes, I do have the block out plates installed.

Jun 25, 2024 | 11:28 AM

Dan Hampton

Le Mans Master

Joined: Sep 2008

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From: Lake Minnetonka, Mn

2018 C1 of Year Finalist

You might want to look at using a phenolic spacer between the carb and the manifold.

Jun 25, 2024 | 12:40 PM

leif.anderson93

Le Mans Master

Joined: Feb 2014

Posts: 8,995

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From: Richardson Texas

Quote:

Originally Posted by Le Mans 1967

You might want to look at using a phenolic spacer between the carb and the manifold.

If you re-read the OP's original post you will see that he already has the phenolic spacers installed.

Jun 25, 2024 | 03:10 PM

CBO

Instructor

Joined: Mar 2021

Posts: 151

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From: Florida

VP let us know if when you resolve the challenge. I have dealt with this and feel I tried it all. Never giving up despite the Florida heat.

Jun 25, 2024 | 04:11 PM

Dan Hampton

Le Mans Master

Joined: Sep 2008

Posts: 5,662

Likes: 2,344

From: Lake Minnetonka, Mn

2018 C1 of Year Finalist

How is the air flow through the shroud and radiator?

Jun 25, 2024 | 04:28 PM

vettepoor

Thread Starter

Burning Brakes

Joined: Mar 2006

Posts: 1,105

Likes: 171

From: Colorado Springs, CO

Quote:

Originally Posted by Dan Hampton

How is the air flow through the shroud and radiator?

Air flow seems fine, Dan. No overheating problems, and car pulls strong. Plugs are burning nice and tan except when I have this percolation issue, then I need to drive it hard to clean up the gas fouling.