WCFB carb problem. Oil pressure ?

OLD INJUN · 09-13-2018, 12:23 PM

Quote:

Originally Posted by randall klein

ed: I’m looking for a correct set of 56-57 wcfb, for another project
have anything?
Or any leads?

Thanks

bicks got 2 sets i done for him

Dissident · 09-13-2018, 06:23 PM

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

Ed Wright · 09-13-2018, 08:17 PM

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.

Mark Yacavone · 09-13-2018, 08:45 PM

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.

FED 387 · 09-13-2018, 09:55 PM

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

Ed Wright · 09-14-2018, 11:43 AM

Quote:

Originally Posted by FED 387

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

Both needle & seats are the same.

HP HUNTER · 09-13-2018, 11:15 PM

Quote:

Originally Posted by Ed Wright

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.

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

gsa612 · 09-14-2018, 02:52 PM

Quote:

Originally Posted by HP HUNTER

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

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

Dissident · 09-14-2018, 05:18 PM

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

Lyn Smith · 09-15-2018, 10:09 AM

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.

09-13-2018, 06:23 PM	#2
Dissident Member Join Date: Jan 2016 Location: Colorado hills Posts: 123 Likes: 11 Liked 73 Times in 36 Posts	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

09-13-2018, 08:17 PM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	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. __________________ Ed Wright 4156 SS/JA

09-13-2018, 08:45 PM	#4
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,819 Likes: 2,910 Liked 5,127 Times in 1,955 Posts	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. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

09-13-2018, 09:55 PM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 531 Liked 333 Times in 180 Posts	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??

09-14-2018, 05:18 PM	#9
Dissident Member Join Date: Jan 2016 Location: Colorado hills Posts: 123 Likes: 11 Liked 73 Times in 36 Posts	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

09-15-2018, 10:09 AM	#10
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,205 Likes: 287 Liked 986 Times in 198 Posts	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. Last edited by Lyn Smith; 09-15-2018 at 10:27 AM.