WCFB carb problem. Oil pressure ?
 

Got a 1956 Carter WCFB on my 55 265 Q/SA.The problem is that coming out of the water as soon as you let off of the throttle the car wants to die.You have to stick it in neutral real quick, and bring up the rpms to keep it from dying.It also will also try to quit running when you pull into your pit space,and let off of the throttle.Going testing tonight and I have a fuel pressure gauge on the car now.Will keep a eye on the pressure.Also the oil pump that came with the pan I used has 80 lbs of pressure at 6500 rpms.That seems high to me.

Re: WCFB carb problem. Oil pressure ?
 

Is there any black smoke when you try to keep it running? If so, something little in the needle and seat? It doesn't take much.

Re: WCFB carb problem. Oil pressure ?
 

No black smoke.Seems more like it is running out of fuel.

Re: WCFB carb problem. Oil pressure ?
 

Does it run down the track fine?

Re: WCFB carb problem. Oil pressure ?
 

Yes runs fine at WOT.

Re: WCFB carb problem. Oil pressure ?
 

May be helpful, maybe not (Grumpy said that to me once!), although we run dual WCFBs, we finally wound up at 14.5 lbs fuel pressure, cured a problem like yours and dying at launch FWIW

Re: WCFB carb problem. Oil pressure ?
 

When we ran one of those on our 55 ss car we ran 15-18 pounds of fuel pressure.

Re: WCFB carb problem. Oil pressure ?
 

For sure going to bump up f pressure.Only has 6.5 now.Had another racer tell me if I want to richen the wcfb up ,just bump up the fuel pressure.Will keep you all informed.Thanks for all the info.Lyn

Re: WCFB carb problem. Oil pressure ?
 

U might also want to check float level and make sure that the float is centered in the float bowl not touching the sides of the bowl at all. They were known to do that as well

Re: WCFB carb problem. Oil pressure ?
 

Have messed with those old carbs forever. We have run both single and dual in s/s so it is way different- but some things to look at is of course float level and binding,also check floats in hot water for leaks. One of the things carb kits show is to check vacuum passage thru body, fuel will slobber on turns or stops. we have always plugged with a piece of wire. We only run 5 1/2 lbs. for fuel pressure.

Randall-looks like we should try 15 lbs.

Re: WCFB carb problem. Oil pressure ?
 

Way, way back in the day we would cut the gasket out above the float to get a slightly higher float setting. Forrest Shropshire of '56 Chevy Milk Wagon fame put me on to this.

Re: WCFB carb problem. Oil pressure ?
 

This may or may not be interesting....at Topeka after Grumpy made our tunnel ram, he stopped by our pit, Ron had the carbs laid out on a table adj float levels with a casting that had been cut out....Grumpy picked up a float, & rubbing his chin said we might try cutting floats & brazing them back together making them small thus holding more fuel

As he climbed on his scooter he said “might work, might not”

Anybody try that? We didn’t, although we cobbled two empty Canton fuel cannsters between regulator and ea carb....result was inconclusive although quite ugly

Once he asked why we didn’t run the fuel injection on the 57 instead of the 2 4’s, Ron said it doesn’t flow enough.....”it will when I get done with it”

Many stories even a R rated one at Mickey’s Landing

Quite the guy

Re: WCFB carb problem. Oil pressure ?
 

I ran dual WCFBs on my '56 many years ago. I ran rear floats in the front as well. They had the "notched" place in the bottoms, used to have needles & seat assemblies made here in Tulsa, Parker Brothers, that had flat "needles", not tapered. They were open, or closed. They made me a set with a .150" orifice. We had no Holley pumps, nor adjustable fuel pressure regulators I knew of. I put a second Stewart Warner fuel pump on it, with them plumbed parallel. Zero gain. Tried them in series, pegged my hand held shop fuel pressure gauge. This was after we had to go Super Stock (they did away with lower Stock classes at one time.) I could not stop flooding that way, but it was faster.
I finally ran separate wires to one fuel pump. Turned it on with a "universal starter button" under my accelerator pedal. Picked my car up. I could not run more than 8 psi with no flossing, with what we had for needle & seats back then. Parker Brothers handled more than anything else I could find. I also used them in customer's early Quadrajets.

Re: WCFB carb problem. Oil pressure ?
 

Ed: I’m looking for a correct set of 56-57 WCFB, for another project
Have anything?
Or any leads?

Thanks

Re: WCFB carb problem. Oil pressure ?
 

No sir. I started with used a 2626S and a 2627S. After many stripped threads(thought I needed to change jets & Rods way too often. Young guys have to learn. LOL
Ordered a new pair, those numbers had been superseded. The replacements had thick, heavier weights on the secondary air flaps. I swapped those with the originals. I first drilled lightening holes in the weights, like I saw a couple of guys at Pomona had done.
Red Anderson said "Ed, you KNOW that is wrong!" Red did not like them tied up, either.
I got home, and put the lighter, earlier shafts & weights in the new carbs. Also put the old 2626S & 2627S tags on, because I felt like they needed to go together. Those were original '56/'57 carb numbers. Third record teardown, Wesley was helping Red. Wesley checked the numbers on the tags, and said "I have not seen these numbers in years!"

Re: WCFB carb problem. Oil pressure ?
 

bicks got 2 sets i done for him

Re: WCFB carb problem. Oil pressure ?
 

I've got a guy who makes clones.

Re: WCFB carb problem. Oil pressure ?
 

Mark Jones and Mark Yacavonne just let me know about this thread. SO, I decided to take a moment and toss my 2 pennies in the hat.



A carbureted system requiring abnormally fuel pressure is generally a description of some other problem occurring. A lot depends on needle and seat sizes or other issues, but there should be no need to run over 6 - 6.5psi on WCFBs that are properly done. Also if abnormally high fuel pressure is required, it is perhaps an indication of a poor overall fuel delivery system. And there are lots of those out there. Perhaps there is a restriction somewhere in the system?


Of course, your experiences may vary.



FWIW as a comparison of carburetor float bowl capacities (total for each listing) :


Holley - center hung floats - 0.066gal
Carter WCFB - standard floats - 0.066gal
Rochester 4GC - standard floats - 0.068gal
Rochester QJ - small float - 0.022gal
Figure about 80% of the numbers above as usable.



If you multiply the SG of the fuel times the volumes above yields the fuel in pounds. Planning for a need of about .5 to .6lbs per hp-hr should give you some food for thought. Example - 100Hp takes 50lbs of fuel per hour, etc. At idle, the power required to twist all the whirly stuff is perhaps 10 - 12Hp or less......not much fuel required there at all.



Regards to All that like this kind of stuff,
HB2:)
Dissident

Re: WCFB carb problem. Oil pressure ?
 

If Dissident ran Jr Stock back in the '60s he would know we weren't allowed larger fuel lines (Red Anderson made slip-on gauges for checking fuel lines. '56 Chevys had 5/16" lines, tank to carb.) We also had to use the factory manual pump. Lots of restrictions.
My stuff got checked a lot.

Re: WCFB carb problem. Oil pressure ?
 

Interesting and nostalgic thread here, but let's not get too far astray, so we can help Lyn with his modern day problem.
So now ,we can run a fuel cell with a 1/2" line, return line system, large regulator, any inlet size..on a single carb application. Can't imagine needing fuel psi in the double digits.

Re: WCFB carb problem. Oil pressure ?
 

Do you possibly have the needle and seat switched that is primary in the secondary and the secondary in the primary??

Re: WCFB carb problem. Oil pressure ?
 

Hmmmm Red Anderson - Make America Great Again.....Right Ed

Re: WCFB carb problem. Oil pressure ?
 

Both needle & seats are the same.

Re: WCFB carb problem. Oil pressure ?
 

Off topic but there would of been a good national tech director,left us way too soon.There would not be the crap that goes on today.Very knowledgeable and personable man.A lot of the tech tools/checkers used in teardown were made by Red. gsa612

Re: WCFB carb problem. Oil pressure ?
 

Mr. Ed, et al,


I fully realize the restrictions of the antique fuel systems and rules. Red Anderson was a great tech guy and was adamant about line dimensions (OD) but was fairly tolerant of use of better fittings and eliminating tight bends in fuel lines as long as you didn't try to BS him. He even tolerated using better tubing as long as it was the correct OD. ;)



I miss Red and his friendly smirk when he asked...."exactly what are you trying to do here..?" Lotsa good Red Anderson stories.



My points about fuel systems were targeted to today's approaches where electric pumps and skillful plumbing are acceptable. Getting away from the antique systems should be obvious. Even then, lots of errors are committed by not paying attention to the basics of fluid flow.




Regards to All that read this kind of stuff,
HB2:)
Dissident

Re: WCFB carb problem. Oil pressure ?
 

Thanks for all the help, and interest in my old 55 project .Raised the fuel pressure to around 8lbs.Seems to run better.Ran 13.55 @97 mph.Need to get a 5.57( has 5.14 now) in it before next test session, as the car only goes 6000 across finish line.The cars previous owner had put a #8 fitting in the stock tank,and had a Holley blue pump on the frame above that.I need to put the pump lower on the frame so it does not have to suck the fuel from the tank.Got a video on You Tube of the car under 1955 Chevrolet Q/SA Jr Stocker run.Not the greatest video,but still fun to watch.Thanks again .Keep the interesting posts coming. https://youtu.be/e601yqejjUM

Re: WCFB carb problem. Oil pressure ?
 

Pretty cool. Lyn. You're right about the pump not being mounted above the tank outlet.

Re: WCFB carb problem. Oil pressure ?
 

For sure. Electric pumps don't suck very well. You should have a full stream of fuel run out the fuel line on the inlet side of the pump if you pull it off the pump. At the back of the car, near the tank's sump. Vehicle acceloration should force fuel to the pump. The pump should not have to try to suck fuel against it.