[Chrysler300] Modifying 1957 WCFB carburetors to address "stalling on turns"

["Ray Melton rfmelton@xxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx>]

Chrysler did indeed issue a Service Bulletin in 1957 to address the stalling problem in the WCFB carburetors.  See the attached Bulletin and redlined corrections thereto.  I bought the new jets and metering rods from The Carburetor Shop, bought the required drills, and provided the parts and Service Bulletin to Jim McGowan, who performed the modifications on my WCFB's, in addition to rebuilding, re-plating and RESTORING the carbs to like-new condition.  Beautiful job!   
 
After installation, the carbs were easily brought into "fine tune" while sitting in the shop; however transmission problems have kept the car from getting on the streets to verify that "the fix" actually works on turns.  Hope to have it back in action within a couple more months!
 
Ray Melton
Las Cruces, NM
1957 Chrysler 300C cvt











From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Ray Melton

Sent: Monday, November 05, 2012
5:25 PM

To: 'Larry Jabin'; 'George
McKovich'

Cc: chrysler300@xxxxxxxxxxxxxxx

Subject: [Chrysler300] Modifying
1957 WCFB carburetors



 

  









Regarding the modifications outlined in the Factory
Service Bulletins, you will also note that in addition to drilling some new
holes and enlarging some passages, they specify changing to new metering rods
in both carburetors and different secondary jets in the front carburetor, none
of which are available any more. However, since I am planning on having those
modifications made to the WCFB?s on my 300C, I have searched for quite a while
and finally found a source for the elusive parts. John Hardgrove at The
Carburetor Shop in Eldon, MO (573-392-7378) will make the new rods for
you on the original machines purchased from Carter when they went out of
business in the ?70?s. These unique, totally manual machines from the 1940?s
can hold precision tolerances down to 0.00005? (five hundred-thousandths of an
inch ? about one hundredth the diameter of a typical human hair!) However, that
kind of precision machining does not come cheaply: the rods cost $320/set of
four and you must also purchase their WCFB rebuild kit @ $154 for two
carburetors. The new secondary jets are a paltry $15/pair. So, I?m looking at
$489 + $14 shipping just for the parts for the rebuild, PLUS the labor for the
restoration itself! This is likely to be a ~$1100 job!  (subsequent note:  Make that a $1350 job!)



The best part about having these new metering rods custom-made is that John has
all the original Carter part numbers and specs as well as the Carter-original
tiny brass billets, so he can also make the new metering rods in the standard
configuration as well as three more stages of ?lean? to adjust for
high-altitude operation. John Chesnutt wrote on December 15, 2008 listing the
Carter P/N?s for these different metering rods. I can forward that message to
any interested member if you are unable to locate it yourself.



Ray Melton



Las Cruces, NM



1957 Chrysler 300C convertible 



White/Gauguin S/N 3N572517

From: Ray Melton [mailto:rfmelton@xxxxxxx]


Sent: Monday, November 05, 2012 1:08 PM

To: 'George McKovich'; Larry Jabin

Cc: chrysler300@xxxxxxxxxxxxxxx

Subject: RE: [Chrysler300] Carbs ?s for 1958 Chrysler 300D



There was an additional Chrysler Service Bulletin No. 1034-CH issued October
16, 1957 to correct a misprint in Service Bulletin No. 1028-CH (August 30,
1957). That misprint affected the dimensions of the modification to the
carburetors; to wit:



Quote: ?Please note on Page 2 of Service Bulletin No. 1028-CH in Figure 1,
under the drawing of the ?Air Horn? the Primary side should be 11/16 inch and
the Secondary side should be 13/16.? (The drawing in #1028 had these dimensions
reversed)



Ray Melton



On Nov 5, 2012, at 9:10 AM, Larry Jabin <larry@xxxxxxxxxx
<mailto:larry%40pwbsfo.com> > wrote:



> 

> When taking off from a stop light at an intersection where I have to make
a left turn

> 

> If I take off quickly the car stumbles so I guess the fuel is moving in
the bowl to the right side of the carb

> 

> I thought I read somewhere on the list server for a fix for this, but
can't seem to find it

> 

> Has anybody else experienced this & know of a fix?

> 

> Thanks

> 

> Larry Jabin

> 

> 


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