Carb adjustments

[Mike Przano]

I have minor black smoke coming out of the tail pipes so I believe that the carb needs adjustment which I've tried several times to do with no luck. What is the best method/sequence for tweaking a Carter WCFB single four barrel. The carb has recently been overhauled and the 283cid/230hp engine idles and revs smoothly. Inputs/suggestions are very much appreciated.
Thanks,
Mike

[David Bodily]

Re: Carb adjustments

Go to http://www.carbs.net They have an excellent step by step procedure listed on their web page.

[Mike Przano]

Re: Carb adjustments

Thanks David, I'll check it out.

[Dale Pearman]

Re: Carb adjustments

Tell us about your spark plugs. Are any black and sooty?..........The idle air adjust regulates only thre QUANTITY of fuel-air mix not the ratio of fuel to air MIXTURE. You may have improper jet/metering rod sizes or there may be problems with the load-enrichment mechanism.

Dale Pearman

[Dale Pearman]

P.S.

I assume there's no air inflow problems. Choke open all ther way? Air cleaner correct and not impeding inflow?

Dale.

[Mike Przano]

Re: Carb adjustments

Dale,
Plugs are brand new with no mileage on them so their clean. The old ones did have a some buildup on them but not excessive.
Mike

[Dale Pearman]

Re: Carb adjustments

Use them for about 500 miles or so and then give them a good reading. That'll tell you if you're rich on fuel. I guess an expensive measured exhaust analysis would work as well.

[Mike Przano]

Re: Carb adjustments

Don't want to do anything expensive. Will drive it for awhile then check the plugs.