59 WCFB Carburetor issues

[Steve C.]

Bought my 59 283 w/ Carter WCFB Carbs in the mid-west and now it is at altitude (7000 feet) and running very rich. Local mechanic says it is OK at idle but very rich at 2500 rpm and suspects jets need to be changed out.
+Has anyone encountered a similar issue/diagnosis?
+Does the solution sound right?
+What's the best source for carb parts--Carbs Unlimited?

Thanks.

[Clem Z.]

Re: 59 WCFB Carburetor issues

Bought my 59 283 w/ Carter WCFB Carbs in the mid-west and now it is at altitude (7000 feet) and running very rich. Local mechanic says it is OK at idle but very rich at 2500 rpm and suspects jets need to be changed out.
+Has anyone encountered a similar issue/diagnosis?
+Does the solution sound right?
+What's the best source for carb parts--Carbs Unlimited?

Thanks.

stock jetting is for sea level. you need to reduce the jet AREA 2% for every 1500 feet above sea level

[Steve C.]

Re: 59 WCFB Carburetor issues

Clem--Thanks for the quick reply and for the technical input.

Steve

[Clem Z.]

Re: 59 WCFB Carburetor issues

my list says the carb is a 3059S with a pri jet .086,sec. jet .063 and metering rod .065 X .050. .086=.005808800,.063 =.003117243,.065 =.003318304,..050 =.001963494 you do the math.

[Gerry P.]

Re: 59 WCFB Carburetor issues

Steve - I had the exact same problem with my '57 dual carb setup. The car idled fine but would run terrible above 1000 RPM. I talked to several mechanics locally, but could never get the problem solved. I finally stumbled on to Ken Erwin in Ohio (phone 618-435-3728) who rebuilds and markets 2X4 carb setups. I explained the richness problem to him and gave him the sizes of my jets and metering rods. He explained they were incorrect for my altitude (Denver 5280'). He sent me what he felt were the correct ones which as I recall were a size down from the standard sizes. Upon installing, the car runs like a top. He charged me $100 for the rods and jets which have been well worth it.
Gerry

[Clem Z.]

Re: 59 WCFB Carburetor issues

my list says the carb is a 3059S with a pri jet .086,sec. jet .063 and metering rod .065 X .050. .086=.005808800,.063 =.003117243,.065 =.003318304,..050 =.001963494 you do the math.

this is for a single carb setup do you have 245 HP or 270 HP ?

[Steve C.]

Re: 59 WCFB Carburetor issues

Clem,
I have a 245hp, 2X4 carbs. Steve

[Steve C.]

Re: 59 WCFB Carburetor issues

Gerry---Thanks a million for the contact info. I'm outside of Park City, UT and finding a local knowledgeable mechanic has been a real challenge. I will get in touch with Ken Erwin.---Steve

[Steve C.]

Re: 59 WCFB Carburetor issues

Clem---The Black Book says they should be 2626S and 2627S carbs. I'm a bit new at this, could you explain the "math" just a bit?? Steve

[Clem Z.]

Re: 59 WCFB Carburetor issues

Clem---The Black Book says they should be 2626S and 2627S carbs. I'm a bit new at this, could you explain the "math" just a bit?? Steve

2626S Pri jet .093, Sec jet .053, metering rod 3 step .077 X .071 X .068. 2627S same jets and metering rod.. .093 diameter jet the area is .006792903, .053 diameter jet the area is .002206182. you need to reduce the area of these jets 2% for each 1500 feet you are above sea level. 7000 feet didvided by 1500 feet = 4.6 so i would reduce the jet areas by 4 X 2= 8% too start. i do not have the Carter numbers for the jets so you would need a set of number pin gauges to check what you have. maybe someone here has the Carter numbers for the jets to see what is in the carbs now.

[Steve C.]

Re: 59 WCFB Carburetor issues

Great information, thanks Clem. If you don't mind I may need to get back in touch as I get more info on this.---Steve

[Timothy B.]

Re: 59 WCFB Carburetor issues

Steve,

What you need to do is find the effective jet area (sq.in) of what's in the carburetor now, that means jet area minus metering rod diameter (the larger diameter for cruise). Then reduce the area by 8% and determine the new effective area of the jet/rod relationship.

When you go up in altitude, the air is not as dense (heavy) so there is not as much pulled into the motor during the intake stroke. The fuel stays the same because of the sea level jetting so the relationship of air/fuel changes and the engine runs rich.

I will post the math later when I find my book, it's not hard to do once you figure out what size you want.

[Steve C.]

Re: 59 WCFB Carburetor issues

Timothy--Thanks so much. I'm working on it!!!--Steve