RE: [Chrysler300] 300 c carburetor modifactions

["George McKovich" <george@xxxxxxxxxxxx>]

Vince..

I have the modification on my 57 Chrysler 300C coupe. I have had it on there
for about two years now and it definitely makes a significant difference.
The engine idles much smoother and my mileage increase from 14.3 to over 17
mpg. It is tricky to do in regards to the drilling of the pilot jet holes,
so I would be very careful with that or have a qualified carb guy do it. I
located the correct jets in some other old carbs and not being able to find
the correct metering rods, I had them manufactured by a guy in Colorado.
After the job was completed, he suggested that if I do another conversion,
that I could get new Edelbrock jets and have the metering rods adjusted in
size to fit those and accomplish the same thing. He suggested that, because
the older jets are often worn and that reduces the accuracy of the
modification. I believe that is the way I will go on our 300C convertible
when I get around to it.

 

George

 

 

 

  _____  

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Vince Helbling
Sent: Monday, December 15, 2008 08:58 AM
To: Chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] 300 c carburetor modifactions

 

I would like to try the modifications described in the Chrysler TECHNICAL
BULLETIN #364 (or 384) dated 7/18/57. The change involves installing (4)
metering rods #75-1160. Does anyone know a source? Or can anyone tell me the
diameter of the rod at high speed (small diameter) and low speed (large
diameter). Is there a cross reference chart available that shows chrysler
numbers vs carter numbers on the metering rods. Does anyone have any info
how this change worked in their car, especially regarding idle? I think I
read somewhere that this change was incorporated into carburetors for 1958.
Anyone have any advice? I have the motor on a running stand in the garage
and will happily post results if I can get enough parts and info to try it.
If the change is already in the 58 carbs, I could trade my spare 57 carbs.
Vince in tampa bay 

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