Re: [Chrysler300] 300E Carburetion ...............................................................

["Gary Barker" <gbarker@xxxxxxxxxxxx>]

I have driven my 62 with the Crab's hooked together and then put the front carb. on Progressive. and I have driven the car on each carb. separately.  The only difference I felt between fixed together and progressively is You have a almost instant takeoff and a faster acceleration with the same pedal travel.  I would spin the tires taking off unless you watched your foot.  For racing I felt the two locked together was the way to go.  It felt that way anyway.  But there was also a decrease in gas mileage but that was expected because you tend to drive it harder.  Overall the car is easer to drive especially in traffic and better mileage with the progressive hookup.

                                    Gary Barker


From: Richard Barber 
Sent: Tuesday, September 01, 2009 11:28 PM
To: Chrysler300E@xxxxxxx ; chrysler300@xxxxxxxxxxxxxxx 
Subject: RE: [Chrysler300] 300E Carburetion ...............................................................


  Points of reference: '55-'56 dual carbs are locked together with primaries
both opening at same time, secondaries open up based on air velocity through
the carbs. I happened to view a 300-D engine Sunday and observed the front
carb opens up only after additional throttle advance--secondaries also
opened at high velocity. So Chrysler had a change of design philosophy in
there somewhere--possibly for fuel economy?

In the olden days, we made it a point to blow the "cobwebs" out of the
secondaries of four barrel carbs and multiple carbs by brief hard runs that
would clear out the old gasoline and some of the crud. If the carbs were
really gummed up after being driven by a very conservative driver, blowing
the cobwebs out did not always work. Cans of carburetor cleaner "Gumout"
were then dumped through the carbs with the engine running, generating great
plumes of white smoke and some additional cleaning. All to avoid a thorough
carb teardown and cleaning. Today's refiners add different materials to
help keep the fuel system cleaner. Shell is now advertising a nitrogen
enhanced gasoline. Adding a non-combustible component to a fuel does not
automatically impress me.

I believe converting from progressive activation of the second carb to a
locked together configuration would help keep the primary side of the second
carb open and clean, but probably not the secondaries unless you
periodically put the pedal to the metal. Downshift to a lower gear and rap
it out if you can't find a place to open her up in high gear.

C-300'ly,
Rich Barber
Brentwood, CA

-----Original Message-----
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Chrysler300E@xxxxxxx
Sent: Tuesday, September 01, 2009 7:38 PM
To: chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] 300E Carburetion
...............................................................

Good evening to all 300E owners out there in 300 Land!

Hypothetical Question:

During normal acceleration, the 4bbl nearest the firewall is the one that 
continuously operates while the front one is idle. Obviously, unless you 
put the pedal to the metal, the front one does not engage. Being that I 
live in South Florida where 50% + of the drivers are uninsured, 70% + can't

even read road signs, and the average speed on most drivers on our highways

averages under 30 mph, what would be wrong with having the linkage adjusted 
so that both carbs engage when you drive the car? My thinking is that if 
the front carb is hardly if ever used and over time that thing will become 
gummed up, would it not be better to have that engage also? I do realize 
that if the carburetion was Gerry rigged this way and one did accelerate at
a 
nice pace, one would continuously smoke the tires, but down here I've 
become very accustomed to having a light foot! Also, gas mileage is not a

consideration since, because of the above referenced driving habits, I only
take 
big red out once in a blue moon - maybe only drive her a couple hundred 
miles a year. Thanks in advance for your input!

Tom
Miami, FL





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